FloraPulse Crop Compatibility
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Pomegranate

Untested

No field data in this species yet. The physics should carry over, but nobody has run it — a pre-test before a full install is the right first step.

Performance

Untested. FloraPulse has no pomegranate calibration and no sensor-hours in the crop — the first stations go in for a validation pilot on Wonderful in San Juan, Argentina, in the 2026-27 season. A literature irrigation profile (well-watered midday stem water potential near -8 to -11 bar in spring, drifting to -12 to -15 bar in midsummer, plus per-stage targets and a crop-coefficient curve) is loaded in the dashboard so pilot readings are graded against a published range rather than a guess. We are also looking for a California testing partner — contact us!

Installation Tips

Research Library

The FloraPulse pomegranate advisory engine draws on 72 sources — 49 peer-reviewed papers plus university extension, industry and vendor guidance. 71 of the 72 citations are verified — against the Crossref or DataCite registry, the live document, or by hand against the publisher's record — and marked ✓. Each entry notes the specific finding it contributes. See these sources in the research library, which spans every crop.

Questions this research answers

Peer-reviewed research (49)
  1. Ayars, J.E., Phene, C.J., Phene, R.C., Gao, S., Wang, D., Day, K.R. & Makus, D.J. (2017). Determining pomegranate water and nitrogen requirements with drip irrigation. Agricultural Water Management 187:11-23. ✓
    Weighing-lysimeter measurement of drip-irrigated 'Wonderful' at Parlier, California: a seasonal water requirement of about 952 mm, a maximum daily use of 10.5 mm and a maximum Kc rising to 1.0-1.2, reached in August and September rather than the hottest month; nitrogen requirement 62-112 kg/ha with no response above it.
  2. Bhantana, P. & Lazarovitch, N. (2010). Evapotranspiration, crop coefficient and growth of two young pomegranate (Punica granatum L.) varieties under salt stress. Agricultural Water Management 97(5):715-722. ✓
    The only fitted salinity response for the crop - a 10 percent fall per dS/m above a 1 dS/m ECe threshold - but it is fitted to relative EVAPOTRANSPIRATION, not fruit yield, on one-year-old rooted cuttings in lysimeters, and the authors report the slope declines through the season so a constant slope under-irrigates early and over-irrigates late.
  3. Bilgili, M.S. & Cetinbas-Genc, A. (2023). Pollen performance of pomegranate under high-temperature stress. Anatolian Journal of Botany 7(1):70-75. ✓
    In-vitro heat on pomegranate pollen: no measurable change at 30 C, but germination fell 15.6 percent and tube length 12.2 percent at 35 C, and germination fell 32.4 percent with tube length down 22.7 percent at 40 C, with apex callose up 197 percent. Fruit set depends mainly on staminate-flower pollen.
  4. Carpio, C. & Curkovic, T. (2016). Seguimiento de la dinamica poblacional de Pseudococcus viburni (Signoret) (Hemiptera: Pseudococcidae) en dos temporadas en un huerto de granados (Punica granatum L.) en Chile central. Chilean Journal of Agricultural & Animal Sciences 32(2):117-126. ✓
    The Southern-Hemisphere mealybug calendar: Pseudococcus viburni migrates from refuges in September, runs three generations, and infested 75 to 100 percent of 'Wonderful' fruit in the calyx cavity at April-May harvest despite five residual sprays a year, with the harvest-time trunk surge coming from fruit splitting on the tree.
  5. Chater, J.M., Santiago, L.S., Merhaut, D.J., Preece, J.E. & Jia, Z. (2018). Diurnal patterns of photosynthesis and water relations for four orchard-grown pomegranate (Punica granatum L.) cultivars. Journal of the American Pomological Society 72(3):157-165. ✓
    Well-irrigated YOUNG orchard trees at Riverside, averaged across four cultivars including Wonderful, ran about -8.25 bar in the morning (sampled 9:00-12:00; the authors also refer to this panel as pre-dawn) and -24.2 bar in the mid-afternoon (15:30-17:30) - a 16 bar swing that is normal physiology in this crop, not a sensor fault. There were no cultivar differences at the afternoon reading.
  6. Daane, K.M., Yokota, G.Y. & Wilson, H. (2019). Seasonal dynamics of the leaffooted bug Leptoglossus zonatus and its implications for control in almonds and pistachios. Insects 10(8):255. ✓
    California's leaffooted bug runs three generations a year with the adult overwintering, and pomegranate is the pivotal August-to-November host on which the third generation matures into the overwintering cohort. Egg strands ran 18 Apr-11 Jun, 27 Jun-31 Aug and 7 Aug-9 Oct; no commercial monitoring lure exists.
  7. El-Khawaga, A.S., Zaeneldeen, E.M.A. & Yossef, M.A. (2013). Response of three pomegranate cultivars (Punica granatum L.) to salinity stress. Middle East Journal of Agriculture Research 1(1):64-75. ✓
    Field evidence that irrigation-water salinity drives cracking and yield loss, with the caveat that the two salinity levels are two different SITES: raising water from EC 1.8 to 6.0 dS/m lifted cracking from 8.8 to 11.7 percent, nearly halved fruits per tree and cut fruit weight 15-26 percent, with 'Wonderful' the least tolerant of three cultivars.
  8. Ezra, D., Kirshner, B., Hershcovich, M., Shtienberg, D. & Kosto, I. (2015). Heart rot of pomegranate: disease etiology and the events leading to development of symptoms. Plant Disease 99(4):496-501. ✓
    Pins heart rot to Alternaria alternata infecting the stigma of the open flower, after which it sits latent about 3-4 months until ripening starts, making bloom rather than harvest the risk stage. It was isolated from pistils of over 85 percent of open flowers; bloom fungicides were judged impractical.
  9. Galindo, A., Calin-Sanchez, A., Grinan, I., Rodriguez, P., Cruz, Z.N., Giron, I.F., Corell, M., Martinez-Font, R., Moriana, A., Carbonell-Barrachina, A.A., Torrecillas, A. & Hernandez, F. (2017). Water stress at the end of the pomegranate fruit ripening stage produces earlier harvest and improves fruit quality. Scientia Horticulturae 226:68-74. ✓
    Withholding about six days at the very end of ripening advances harvest and raises anthocyanins, punicalagin and ellagic acid with no marketable-yield loss - but total juice phenolics FELL 3133 to 2681 mg/L, equatorial diameter fell 86.9 to 80.4 mm and cracked fruit rose 13.4 to 20.9 percent of yield. Longer cut-offs cost far more.
  10. Galindo, A., Rodriguez, P., Collado-Gonzalez, J., Cruz, Z.N., Torrecillas, E., Ondono, S., Corell, M., Moriana, A. & Torrecillas, A. (2014). Rainfall intensifies fruit peel cracking in water stressed pomegranate trees. Agricultural and Forest Meteorology 194:29-35. ✓
    The rain-cracking mechanism, measured: 88.4 mm of rain on water-stressed trees raised aril turgor 1.8-fold against 1.1-fold for the peel, so the arils pressed the peel apart. Cracked fruit rose 13.4, 20.9, 28.2, 51.2 and 64.1 percent of yield at 0, 6, 15, 25 and 36 days of cut-off, where stem potential hit -29.0 to -36.4 bar.
  11. Galindo, A., Rodriguez, P., Mellisho, C.D., Torrecillas, E., Moriana, A., Cruz, Z.N., Conejero, W., Moreno, F. & Torrecillas, A. (2013). Assessment of discretely measured indicators and maximum daily trunk shrinkage for detecting water stress in pomegranate trees. Agricultural and Forest Meteorology 180:58-65. ✓
    Well-watered midday stem water potential in adult drip-irrigated pomegranate was -7.3 to -9.8 bar, and a full withholding fell to -19.8 bar at about 0.25 bar per day with full recovery within six days of re-irrigation. Trunk shrinkage stops tracking stress below about -16.7 bar stem.
  12. Ghasemi Soloklui, A.A., Ershadi, A. & Fallahi, E. (2012). Evaluation of cold hardiness in seven Iranian commercial pomegranate (Punica granatum L.) cultivars. HortScience 47(12):1821-1825. ✓
    Seasonal dormant-wood freeze thresholds: midwinter LT50 runs about -20 to -22 C, autumn hardiness is far weaker at -7.7 to -9.2 C in November, and March deacclimation raises LT50 to about -12 C in the least hardy cultivar. Early leaf abscission was associated with faster autumn acclimation.
  13. Ghasemi-Soloklui, A.A. & Ershadi, A. (2023). Screening pomegranate cultivars for freezing tolerance by reliable methods. International Journal of Horticultural Science and Technology 10(2):211-222. ✓
    Shows a pomegranate frost threshold must be season-specific: the same cultivars had an LT50 of only -4.2 to -10.0 C on non-acclimated August tissue (mean -6.13 C) but -18.8 to -23.5 C in deep January dormancy, so summer hardiness does not predict winter hardiness.
  14. Gomez-Bellot, M.J., Parra, A., Nortes, P., Alarcon, J.J. & Ortuno, M.F. (2024). Searching for a deficit irrigation strategy to save water and improve fruit quality without compromising pomegranate production. Scientia Horticulturae 324:112631. ✓
    Well-watered midday stem sits near -8 bar and tracks vapour pressure deficit, needing about 21 days to register a 50 percent ETc cut. Its own pre-harvest result: 21 days at 25 percent ETc through late ripening saved 8 percent of water, raised phenolics 19 percent and cost no marketable yield. Its 6-day and 15-day withholding figures are second-hand citations of Galindo - see pom-galindo2014.
  15. Grinan, I., Morales, D., Galindo, A., Torrecillas, A., Perez-Lopez, D., Moriana, A., Collado-Gonzalez, J., Carbonell-Barrachina, A.A. & Hernandez, F. (2019). Effect of preharvest fruit bagging on fruit quality characteristics and incidence of fruit physiopathies in fully irrigated and water stressed pomegranate trees. Journal of the Science of Food and Agriculture 99(3):1425-1433. ✓
    Fully irrigated Mollar de Elche held midday stem potential at -9.9 bar while a 60-day withholding reached -24.0 bar. Splitting rose 7.2 to 20.8 percent, confounded with 51 mm of uncontrolled rain mid-treatment - itself the stress-then-rewet sequence blamed. Irrigation did nothing to sunburn; bagging cut it 21.4 to 3.6 percent.
  16. Hasani, M., Zamani, Z., Savaghebi, G. & Fatahi, R. (2012). Effects of zinc and manganese as foliar spray on pomegranate yield, fruit quality and leaf minerals. Journal of Soil Science and Plant Nutrition 12(3):471-480. ✓
    Two foliar sprays of 0.6 percent MnSO4 with 0.3 percent ZnSO4, the first 15 days before full bloom and the second a month later, raised yield from 6.7 to 8.1 kg/tree plus soluble solids, juice content and anthocyanin index, while 0.6 percent ZnSO4 alone was phytotoxic and caused necrotic leaf spots.
  17. Hosseini, S.A., Goldansaz, S.H., Fotoukkiaii, S.M., Menken, S.B.J. & Groot, A.T. (2017). Seasonal pattern of infestation by the carob moth Ectomyelois ceratoniae in pomegranate cultivars. Crop Protection 102:19-24. ✓
    Carob moth infestation in pomegranate is driven by cracking: infestation correlated with cracking at r = 0.71 and cracked fruit were infested 5 to 15 times more than uncracked, because early instars cannot penetrate an intact crown but enter freely through cracks. Controlling cracking doubles as pest control.
  18. Ikinci, A. (2025). Sunburn in pomegranate (Punica granatum L.) fruit: causes and integrated management practices for its prevention. Journal of Agriculture 8(2):195-211. ✓
    A sunburn review putting injury above 45-50 C fruit surface temperature - higher than the 41-47.5 C Yazici measured, so say which the card uses. Water stress worsens it by closing stomata and removing transpirational cooling, and irregular irrigation drives sunburn to 30-40 percent of fruit versus 15-20 under an optimized regime.
  19. Intrigliolo, D.S., Bonet, L., Nortes, P.A., Puerto, H., Nicolas, E. & Bartual, J. (2013). Pomegranate trees performance under sustained and regulated deficit irrigation. Irrigation Science 31(5):959-970. ✓
    Three seasons on Mollar de Elche, measured directly: the control fell from -6/-8 bar early to -12/-15 bar late; sustained 50 percent ETc reached -20 bar (-24 in year one) and regulated deficits -20 to -21. Restricting in May-June was best - below -14 bar there RAISED fruit number for a 5.5 percent fruit-weight cost. Cracking stayed 2-6 percent.
  20. Intrigliolo, D.S., Nicolas, E., Bonet, L., Ferrer, P., Alarcon, J.J. & Bartual, J. (2011). Water relations of field grown pomegranate trees (Punica granatum) under different drip irrigation regimes. Agricultural Water Management 98(4):691-696. ✓
    The well-watered midsummer anchor: the fully irrigated control varied between -10 and -14 bar for most of the season and touched -15.5 bar only on the single highest-demand day, while deficits bottomed just above -20 bar - near-isohydric. Stem potential is far quieter than gas exchange (CV 0.12 vs 0.23) but separated treatments weeks later.
  21. Intrigliolo, D.S., Puerto, H., Bonet, L., Alarcon, J.J., Nicolas, E. & Bartual, J. (2011). Usefulness of trunk diameter variations as continuous water stress indicators of pomegranate (Punica granatum) trees. Agricultural Water Management 98(9):1462-1468. ✓
    The closest thing to a continuous-sensor trial in this crop: maximum daily trunk shrinkage had the bigger raw signal but four to five times the noise, a signal-to-noise of 5-6 against 16-17 for pressure-chamber stem potential. Its shrinkage-versus-potential slope also drifted within one season, so a fixed shrinkage threshold is unsafe.
  22. Kashash, Y., Mayuoni-Kirshenbaum, L., Goldenberg, L., Choi, H.J. & Porat, R. (2016). Effects of harvest date and low-temperature conditioning on chilling tolerance of Wonderful pomegranate fruit. Scientia Horticulturae 209:286-292. ✓
    Harvest date controls 'Wonderful' chilling tolerance: 100 percent of early- and mid-season fruit showed chilling injury after four weeks at 1 C plus a week at 20 C versus 50 percent of late-season fruit, and a 15 C ten-day pre-storage conditioning prevented injury entirely through cold quarantine.
  23. Laribi, A.I., Palou, L., Intrigliolo, D.S., Nortes, P.A., Rojas-Argudo, C., Taberner, V., Bartual, J. & Perez-Gago, M.B. (2013). Effect of sustained and regulated deficit irrigation on fruit quality of pomegranate cv. Mollar de Elche at harvest and during cold storage. Agricultural Water Management 125:61-70. ✓
    The cleanest per-stage well-watered table in the literature - the seasonal drift measured in one table. Fully irrigated Mollar de Elche averaged -10.2 bar at flowering and fruit set, -12.4 bar through fruit growth and -12.2 bar at ripening; sustained deficit ran -12.1, -15.9 and -16.7 bar and cut cold-storage weight loss 21 to 17 percent.
  24. Lazare, S., Lyu, Y., Yermiyahu, U., Heler, Y., Kalyan, G. & Dag, A. (2020). Optimizing nitrogen application for growth and productivity of pomegranates. Agronomy 10(3):366. ✓
    Nitrogen fertigation on bearing 'Wonderful' was optimal at 20-70 mg N/L and harmful above 70, with uptake efficiency falling from nearly 100 percent to 13 percent at 200 mg/L. Critically, leaf N plateaus near 15-20 mg/g and SPAD saturates, so tissue analysis cannot detect over-fertilisation.
  25. Lyu, Y., Porat, R., Yermiyahu, U., Heler, Y., Holland, D. & Dag, A. (2020). Effects of nitrogen fertilization on pomegranate fruit, aril and juice quality. Journal of the Science of Food and Agriculture 100(4):1678-1686. ✓
    Nitrogen level had no effect on cracking across 5-200 mg N/L, but sunburn was strongly U-shaped: 56-62 percent of fruit sunburned at the lowest N rate versus 6-16 percent at 100 mg N/L, rising again at 200. Alternaria black rot rose with N, and marketable fruit peaked at 100-150 mg N/L.
  26. Maghoumi, M., Fatchurrahman, D., Amodio, M.L., Quinto, M., Cisneros-Zevallos, L. & Colelli, G. (2023). Is pomegranate husk scald during storage induced by water loss and mediated by ABA signaling? Journal of the Science of Food and Agriculture 103(6):2914-2925. ✓
    Ties a storage disorder to fruit water status: husk scald in 'Wonderful' appeared after three months at 11 C where fruit had lost about 10 percent of its weight, was REDUCED but still present at 7 C, and was absent at 3.5 C where fruit lost 5 percent, with water loss rising with vapour pressure deficit.
  27. Maity, A., Babu, K.D. & Sarkar, A. (2019). Guidelines for fertilizer use in pomegranate orchards based on seasonal uptake and partitioning of nutrients. Scientia Horticulturae 252:138-148. ✓
    Whole-plant excavation sets fertigation timing: most N, K, Ca, Mg and S uptake occurs between pre-pruning and bloom, peak P uptake runs from fruit development to maturity, Fe, Mn and B demand peaks at fruit enlargement and Zn during fruit development. Uptake order is Ca > N > K > Mg > S > P.
  28. Mamay, M., Ünlü, L., Yanık, E. & İkinci, A. (2014). Şanlıurfa ilinde nar bahçelerinde Harnup Güvesi [Apomyelois (=Ectomyelois) ceratoniae Zell. (Lepidoptera: Pyralidae)]’nin gün.derece modellemesi [Degree-day modelling of carob moth in pomegranate orchards in Şanlıurfa province]. Türkiye Entomoloji Bülteni 4(2):87-96. ✓
    The only field degree-day model for carob moth in pomegranate: base 10.82 C from 1 January, 294-404 degree-days to first flight, four peaks to about 3107, 624 per generation. The base is a laboratory constant, the two sites disagreed by 400-700 degree-days for the same events, and it is not interchangeable with UC IPM single-sine.
  29. Marathe, R.A. & Babu, K.D. (2017). Plant growth, nutrient uptake, water use efficiency and yield of pomegranate as affected by irrigation scheduling in loamy soils of semi-arid regions. Indian Journal of Horticulture 74(2):204-209. ✓
    A three-year drip trial on three-year-old plants gives a direct soil-water-deficit to cracking dose-response: 58.8, 45.3 and 37.7 percent of fruit cracked at 30, 40 and 50 percent of pan evaporation, against 0.8 percent at 70 percent and zero at 80 and 90 percent, with peak yield also at 70 percent.
  30. Marathe, R.A., Babu, K.D., Murkute, A.A. & Chaudhary, D.T. (2016). Root distribution pattern of pomegranate in different soil types. Indian Journal of Horticulture 73(4):588-591. ✓
    Excavated four-year-old Bhagwa trees in India show root activity concentrated in the top 45 cm, with about 75 percent of roots inside a 60 cm radius of the trunk, with 92.7 percent of root weight in the top 60 cm, anchoring an effective rooting depth near 0.45 to 0.60 m for typical soils.
  31. Martinez-Nicolas, J.J., Galindo, A., Grinan, I., Rodriguez, P., Cruz, Z.N., Martinez-Font, R., Carbonell-Barrachina, A.A., Nouri, H. & Melgarejo, P. (2019). Irrigation water saving during pomegranate flowering and fruit set period do not affect Wonderful and Mollar de Elche cultivars yield and fruit composition. Agricultural Water Management 226:105781. ✓
    The 'Wonderful' setpoint paper: fully irrigated trees averaged -9.3 and -10.6 bar at midday over two seasons, while withholding across flowering and fruit set took them to -17.0 bar, saving 19-30 percent of water with no SIGNIFICANT loss of marketable yield or fruit size (38.5 to 31.4 and 54.5 to 45.2 kg/tree, n.s.).
  32. Melgarejo, P., Martinez-Valero, R., Guillamon, J.M., Miro, M. & Amoros, A. (1997). Phenological stages of the pomegranate tree (Punica granatum L.). Annals of Applied Biology 130(1):135-140. ✓
    The BBCH phenology scale for the crop, on which every later pomegranate stage or degree-day study is built: 13 principal stages with durations and base-10 C degree-days, from bud swelling (11 days, 12 degree-days) through open flower, petal fall and fruit set to a 90-day fruit-growth stage, a 35-day ripening stage and a 57-day leaf fall.
  33. Melgarejo, P., Martinez, J.J., Hernandez, F., Martinez-Font, R., Barrows, P. & Erez, A. (2004). Kaolin treatment to reduce pomegranate sunburn. Scientia Horticulturae 100(1-4):349-353. ✓
    Four Surround WP kaolin sprays at 2-3 week intervals from mid-June to early August, the first at 5 percent and the rest at 2.5 percent, cooled fruit surfaces by 4.9 C and cut sunburn from 21.9 to 9.4 percent of fruit and unmarketable fruit from 11.6 to 3.9 percent of yield.
  34. Mellisho, C.D., Egea, I., Galindo, A., Rodriguez, P., Rodriguez, J., Conejero, W., Romojaro, F. & Torrecillas, A. (2012). Pomegranate (Punica granatum L.) fruit response to different deficit irrigation conditions. Agricultural Water Management 114:30-36. ✓
    Shows WHERE fruit size is lost: withholding through the second half of linear fruit growth drove stem potential to -19.8 bar and, despite full rapid recovery on re-watering, fruit stayed smallest at BOTH picks - 265 and 251 g against 308 and 316 g - with no compensatory growth. Grower practice held trees below the control all season.
  35. Narjesi, V., Bonyanpour, A. & Ghasemi-Soloklui, A.A. (2025). Determining the optimal harvest time for pomegranate variety Wonderful in semi-arid climate. Scientific Reports 15:7668. ✓
    The hang-time trade-off in 'Wonderful': delaying harvest from 155 to 185 days after flowering raised soluble solids from about 13.3-15.0 to 17.8-18.0 Brix and dropped acidity to 1.11-1.53 percent, but cracking rose to 30.25 percent in one orchard and 11.93 percent in another. Flowering to harvest is 160-190 days.
  36. Narjesi, V., Fatahi Moghadam, J. & Ghasemi-Soloklui, A.A. (2023). Effects of photo-selective shade net color and shading percentage on reducing sunburn and increasing the quantity and quality of pomegranate fruit. International Journal of Horticultural Science and Technology 10(Special Issue):25-38. ✓
    Quantifies the sunburn-versus-cracking trade-off of shade: 50 percent shade nets took sunburn from 27.85 percent of fruit to zero and lifted yield from 19.5 to 29.7 kg/tree, but the dark green 50 percent net more than doubled cracking, from 7.2 to 16 percent. Fruit surface reached 47.2 C in full sun versus 36-38 C shaded.
  37. Olmo-Vega, A., Garcia-Sanchez, F., Simon-Grao, S., Simon, I., Lidon, V., Nieves, M. & Martinez-Nicolas, J.J. (2017). Physiological responses of three pomegranate cultivars under flooded conditions. Scientia Horticulturae 224:171-179. ✓
    Pomegranate is genuinely flood-sensitive despite its drought reputation - though this is a 20-litre CONTAINER study, not an orchard result. Six days with water three centimetres above the root zone cut growth by more than 30 percent in all three cultivars, with no adaptive mechanism, and the plants behaved as water-deficit stressed.
  38. Ozturk, N. (2018). Creating a degree-day model of honeydew moth (Cryptoblabes gnidiella Mill., 1867) (Lepidoptera: Pyralidae) in pomegranate orchards. Turkish Journal of Entomology 42(1):53-62. ✓
    A five-season honeydew moth degree-day model for pomegranate: base 12.0 C from 1 January, pheromone traps at 80 degree-days, first adults at 120, and egg hatch of the five generations at 250, 800, 1375, 1930 and 2500 degree-days, each crosswalked to a fruit growth stage.
  39. Parvizi, H., Sepaskhah, A.R. & Ahmadi, S.H. (2016). Physiological and growth responses of pomegranate tree (Punica granatum cv. Rabab) under partial root zone drying and deficit irrigation regimes. Agricultural Water Management 163:146-158. ✓
    The arid-site calibration warning: on cv. Rabab near Neyriz even fully irrigated trees bottomed near -27 bar, against about -11 bar in Spain, which the authors attribute to cultivar and climate. Pomegranate behaved anisohydrically there, stomata closing sharply only above about 7 kPa leaf-to-air VPD, and they recommend holding above -25 bar.
  40. Pena, M.E., Artes-Hernandez, F., Aguayo, E., Martinez-Hernandez, G.B., Galindo, A., Artes, F. & Gomez, P.A. (2013). Effect of sustained deficit irrigation on physicochemical properties, bioactive compounds and postharvest life of pomegranate fruit (cv. Mollar de Elche). Postharvest Biology and Technology 86:171-180. ✓
    Sustained deficit irrigation at 32 percent of reference evapotranspiration saved 41.5 percent of water and delayed the onset of chilling-injury symptoms in 5 C storage from 30 days to 60 days, giving up to 90 days of shelf life with higher soluble solids, peel redness, vitamin C and antioxidant capacity.
  41. Porras-Jorge, R., Aguilar, J.M., Baixauli, C., Bartual, J., Pascual, B. & Pascual-Seva, N. (2025). Effect of deficit irrigation on agronomic and physiological performance of pomegranate (Punica granatum L.). Plants 14(2):164. ✓
    The best-calibrated stem-potential dataset for the crop: bagged-leaf midday potential averaged -10.4 bar under full irrigation and -15.6 bar under a 50 percent sustained deficit. It classes pomegranate anisohydric, gives a 50 cm rooting depth with peak root density at 25 cm, and cites a 5 dS/m ECe salinity threshold.
  42. Porras-Jorge, R., Aguilar, J.M., Baixauli, C., Bartual, J., Pascual, B. & Pascual-Seva, N. (2025). The effect of deficit irrigation on the quality characteristics and physiological disorders of pomegranate fruits. Plants 14(5):720. ✓
    The deficit-versus-cracking trade-off with its season confound: 50 percent sustained deficit cracked 25.1 percent in hot 2023 with 48.4 percent non-marketable, but the SAME control cracked 8.5 percent in 2022 and 1.7 in 2023. Stem potential never fell below -16.3 bar, so the paper blames 46.8 C heat and 92.5 mm of rain, not potential.
  43. Ramos, T.B., Darouich, H., Oliveira, A.R., Farzamian, M., Monteiro, T., Castanheira, N., Paz, A., Goncalves, M.C. & Pereira, L.S. (2023). Water use and soil water balance of Mediterranean tree crops assessed with the SIMDualKc model in orchards of southern Portugal. Agricultural Water Management 279:108209. ✓
    The only dual-Kc calibration for a commercial pomegranate orchard: five-year-old 'Acco' in southern Portugal gave basal Kc of 0.24, 0.60 and 0.52, a 10 C degree-day base, and a salinity threshold of 4.0 dS/m ECe borrowed from the olive literature rather than measured, with no stress observed at a measured 4.04 dS/m.
  44. Selahvarzi, Y., Zamani, Z., Fatahi, R. & Talaei, A.-R. (2017). Effect of deficit irrigation on flowering and fruit properties of pomegranate (Punica granatum cv. Shahvar). Agricultural Water Management 192:189-197. ✓
    The widest measured well-watered envelope in the crop, -3 to -12 bar, and a clean mild-versus-severe contrast: an early dry-down to -14/-18 bar recovered immediately and raised fruit weight 246 to 317 g, while season-long 50 percent ETc reached -21/-28 bar, never recovered and cost 36 and 52 percent of yield. It also compacted bloom.
  45. Singh, A., Burman, U., Santra, P., Saxena, A. & Meghwal, P.R. (2019). Relationship of plant water status and leaf gas exchange with fruit cracking of pomegranate. Indian Journal of Horticulture 76(2):289-293. ✓
    The only located publication regressing measured plant water status on cracking: leaf water potential correlated with cracking at r = 0.45 and relative water content at r = -0.41, with a multiple-regression model of R2 = 0.60 across -22.6 to -28.7 bar and 18.0 to 42.8 percent cracking. Leaf, not stem, potential.
  46. Singh, A., Shukla, A.K. & Meghwal, P.R. (2020). Fruit cracking in pomegranate: extent, cause, and management - a review. International Journal of Fruit Science 20(S3):S1234-S1253. ✓
    The cracking review: losses reach 65 percent and 65-75 percent in arid regions, with a typical economic loss of 10-40 percent and about a 50 percent cut in marketing value. The mechanism is a dry spell that stiffens the skin followed by a large water supply the meristematic tissue resumes growing under.
  47. Volschenk, T. (2021). Effect of water deficits on pomegranate tree performance and fruit quality - a review. Agricultural Water Management 246:106499. ✓
    The quantitative yield penalty for stem-potential deficit: relative yield fell 24, 34 and 45 percent when the seasonal minimum midday stem water potential dropped 5, 10 and 18 bar below well-watered trees, and maximum relative yield needed 721 to 953 mm of seasonal evapotranspiration.
  48. Yazdanpanah, P., Jonoubi, P., Zeinalabedini, M., Rajaei, H., Ghaffari, M.R., Vazifeshenas, M.R. & Abdirad, S. (2021). Seasonal metabolic investigation in pomegranate (Punica granatum L.) highlights the role of amino acids in genotype- and organ-specific adaptive responses to freezing stress. Frontiers in Plant Science 12:699139. ✓
    Frost hardiness rises gradually through autumn, peaks in December and January at an LT50 of -20 to -25 C, and de-hardens toward April, with buds de-hardening before stems. Real Iranian events of -20 to -23 C lasting weeks destroyed about 35,000 ha with 50-90 percent production loss.
  49. Yazici, K. & Kaynak, L. (2009). Effects of air temperature, relative humidity and solar radiation on fruit surface temperatures and sunburn damage in pomegranate (Punica granatum L. cv. Hicaznar). Acta Horticulturae 818:181-186. ✓
    Sets the physical sunburn thresholds on cv. Hicaznar: fruit surface temperatures of 41 to 47.5 C cause sunburn, those values were never reached on days when maximum air temperature stayed below 30 C, and mean solar radiation of 610-900 W/m2 tracked maximum fruit surface temperature.
University & extension guidance (20)
  1. Agehara, S., Wang, W. & Sarkhosh, A. (2019). Guidelines for Pomegranate Nutrient Management in Florida. UF/IFAS Extension EDIS HS1347. ✓
    The only complete US extension nutrient programme for pomegranate: age-scaled N-P2O5-K2O rates, a 1:1.25 N-to-K2O ratio, a March-to-August fertigation split, and deficient/optimum/excessive leaf ranges for 13 elements. It names calcium deficiency plus soil-moisture fluctuation before and during harvest as the main cracking causes.
  2. Ayars, J.E., Phene, C.J., Wang, D., Banuelos, G.S., Makus, D., Day, K.R. et al. (2015). Improving Pomegranate Fertigation and Nitrogen Use Efficiency with Drip Irrigation Systems. CDFA Fertilizer Research and Education Program, Final Report, Grant 12-0387-SA, 52 pp. ✓
    California weighing-lysimeter data for mature drip-irrigated 'Wonderful': maximum Kc of 1.0-1.05, peak use about 0.3 in/day, a seasonal requirement near 37 inches, and 100 lb N per acre per year sufficient with no yield gain up to 300 lb. Leaf-out follows about day 80 with full bloom about day 110.
  3. Bartual, J., Intrigliolo, D.S., Pomares, F., Bonet, L., Parra, J., Garcia-Gonzalez, J., Perez-Gago, M.B. & Palou, L. (2016). Manejo del riego y la fertilizacion del granado. Revista de Fruticultura 51:40-51. ✓
    The IVIA Spanish extension synthesis sets midday bagged-leaf stem potential targets of -8 to -12.5 bar at flowering and fruit set, tolerating -16 bar at the end of fruit growth and ripening, with about 4,250-4,500 m3/ha applied a season and 14-18 percent water saving from deficit irrigation at flowering and fruit set.
  4. Buesa, I., Badal, E., Guerra, D., Garcia, J., Lozoya, A., Bartual, J., Intrigliolo, D.S. & Bonet, L. (2012). Development of an irrigation scheduling recommendation for pomegranate trees (Punica granatum). Options Mediterraneennes Serie A 103:141-145. ✓
    The IVIA experimental monthly Kc curve of 0.32 in March rising to 0.74 in July and falling to 0.42 in November, with about 425 mm applied a year, and three seasons of midday stem water potential in a well-managed 'Mollar de Elche' orchard ranging from -5.7 bar in spring to -16.8 bar in late summer.
  5. Burghart, D.R., Chater, J. & Kaplan, J.D. (2025). An economic analysis of sunburn and fruit split for alternative pomegranate varieties for a representative California pomegranate orchard: preliminary results. CSU Sacramento Department of Economics Research Note 2025-2. ✓
    A PRELIMINARY California economic model, not a field measurement: it puts 'Wonderful' sunburn loss at 56.7 percent of yield, worst of nine cultivars, against 14.8 percent for Parfianka. Spanish 'Mollar de Elche' trials measure 2.4-16.2 percent, and the one Chilean 'Wonderful' trial ~30 percent with any sunburn but only 3 percent severe. Also applies a flat 7 percent split allowance.
  6. California Department of Food and Agriculture (1983). Pomegranates, Maturity Defined. California Code of Regulations, Title 3, Section 1464.3. ✓
    The statutory California maturity definition: juice from a composite sample of at least 10 percent of the fruit in any container must not exceed 1.85 percent acid AND must be at least as dark as Munsell colour chart 5R-5/12. Both conditions are required, not either.
  7. Crisosto, C.H., Mitcham, E.J. & Kader, A.A. (1996). Pomegranate: Recommendations for Maintaining Postharvest Quality. UC Davis Postharvest Research and Extension Center, Produce Facts.
    The California maturity and storage rules: juice colour at Munsell 5R-5/12 or darker, acidity below 1.85 percent, soluble solids above 17 percent and tannin below 0.25 percent, with storage at 5 C for up to two months and 7.2 C beyond, 90-95 percent humidity, and no ripening after harvest.
  8. Day, K.R., Klonsky, K.M. & De Moura, R.L. (2010). Sample Costs to Establish and Produce Pomegranates, San Joaquin Valley - South, Furrow Irrigation. University of California Cooperative Extension, Cost and Return Study PG-VS-10. ✓
    The UC cost study supplies the California operating baseline: 36 acre-inches consumptive use across nine irrigations April to early September, harvest beginning mid to late September, frost-protection irrigation when temperatures are forecast below about 23-25 F, a warning against late-fall watering, and 75-125 lb N per acre in March-April.
  9. FAO. Annex 1: Crop Salt Tolerance Data. ✓
    FAO Annex 1 rates pomegranate moderately sensitive to salinity but lists NO threshold and NO yield-decline slope, and the rating is on a shoot-growth rather than a fruit-yield basis. The table notes that some crops carry only a qualitative rating because the experimental data are inadequate to calculate a threshold and slope.
  10. Fernandez Long, M.E., Barnatan, I., Murphy, G. & Dominici, C. (2013). Heladas agrometeorologicas (3 C), estacion San Juan INTA, periodo 1969-2011. Centro de Informacion Agroclimatica, Facultad de Agronomia, Universidad de Buenos Aires. ✓
    San Juan frost climatology on a 43-year INTA series, with dates and temperatures read as SEPARATE columns: the mean last frost is 20 September, one year in five 7 October, and the record 9 November, over a 143-day frost period with 74 frost days. Separately, the annual absolute minimum averages -4.4 C and reached -6.8 C.
  11. Glozer, K. & Ferguson, L. (2008). Pomegranate Production in Afghanistan. University of California, Davis, College of Agricultural and Environmental Sciences / UC Davis International Programs, 32 pp. ✓
    The densest source of pomegranate agronomic constants: 'Wonderful' at 150 chill hours below 6 C, irrigation at about 50 percent depletion sampled at 20-40 cm, nitrogen and zinc as the only fertilisers usually needed, a mid-July nitrogen cut-off for proper hardening off, and the rule that alternating very wet and very dry soil increases cracking.
  12. Haviland, D.R., Bentley, W.J., Carroll, D., Tollerup, K.E., Walton, V.M., Adaskaveg, J.E. & Michailides, T.J. (2018). UC IPM Pest Management Guidelines: Pomegranate. UC ANR Publication 3474, UC Statewide IPM Program. ✓
    The UC IPM pomegranate guidelines, with their own caveat that degree-day timing HAS NOT BEEN STUDIED in pomegranate and is borrowed from stone fruit: omnivorous leafroller sprayed 700-900 degree-days after first flight on a 48 F lower and 87 F upper threshold, leaffooted bug scouted mid-August to October, and fruit rots managed by steady water.
  13. Kido, H., Flaherty, D.L., Barnett, W.W. & Andris, H.L. (1982). Omnivorous leafroller (Platynota stultana) phenology model. In: Grape Pest Management, UC Division of Agricultural Sciences Publication 4105, pp. 126-136; reproduced in the UC IPM degree-day phenology model database. ✓
    The omnivorous leafroller phenology model behind the UC IPM timings: lower developmental threshold 48.0 F and 1168.2 degree-days F per egg-to-adult generation, accumulated by single sine. The host of record is grapes and UC IPM advises local validation before relying on it.
  14. Mendonca, K.M. (2020). Fruit, Flower, and Thorn: A Phenological Study of Wonderful Pomegranate. M.S. thesis in Agriculture, California Polytechnic State University, San Luis Obispo. ✓
    Measured California 'Wonderful' phenology on commercial trees at Lost Hills: first flower 24 March, strip harvest 26 September, three distinct bloom periods with the first lasting about six weeks, hermaphroditic flushes in bloom weeks 1-6 and 11-16, and 93 percent of flowers staminate. Its October-November harvest window is a secondary citation.
  15. Munoz Lorenzo, J.P., Caretta, A.I. & Albors, C.M. (2022). Caracterizacion agrometeorologica del viento Zonda en el Valle de Tulum. Revista La U, Universidad Nacional de San Juan, 5 May 2022. ✓
    Zonda wind in the Valle de Tulum: Sarmiento averages six surface events a year with 46 percent in spring and October its peak month, Pocito averages 16 peaking in August. Events bring relative humidity to zero, gusts over 90 km/h and up to three days, desiccating stigmas and spiking plant water use.
  16. Otarola Aliaga, J.I. (2015). Efecto de distintos regimenes hidricos y de la aplicacion de calcio y caolinita sobre la incidencia de partidura en frutos de granado Wonderful. Tesis de Magister en Ciencias Agropecuarias, Facultad de Ciencias Agronomicas, Universidad de Chile, Santiago. ✓
    The Southern-Hemisphere 'Wonderful' trial tying irrigation to cracking: an 8-week deficit at 60 percent of grower irrigation across fruit-growth Stages I-II cut cracking 36 to 21 percent and the daily rate from 1.1-1.2 to 0.4 percent/day on 14 percent less water. Measured yield was 28.9 vs 36.8 t/ha, n.s. Xylem potential ran -12 to -17 bar.
  17. Paz, S., Pardo, A., Gaspar, J., Lopez, J.V., De La Concepcion, J. & Bartual, J. (2022). Ensayo comparativo de variedades de granado (2018-2022) - Informe final. Generalitat Valenciana, Conselleria d Agricultura, Servicio de Transferencia de Tecnologia, EEA Vila-real. ✓
    The only 'Wonderful'-specific phenology anchor set: budbreak 21 February plus or minus 4 days, harvest 20 October plus or minus 5 days, 132 days from tagged fruit set to maturity in Spain. Cracking tracked rain at ripening, exceeding 12 percent in wet seasons; the report ranks the cultivar intermediate for sunburn but assigns it no sunburn percent - only the 66.95 percent packout.
  18. Sarkhosh, A. & Williamson, J. The Pomegranate. UF/IFAS Extension EDIS HS44/MG056. ✓
    Two hard frost anchors plus the practical cracking rule: 12 F severely injures dormant trees while a photographed 28 F late freeze damaged a non-dormant tree in March, and gradual reduction of irrigation through maturation reduces splits while sudden changes a few weeks before harvest cause them. It also calls pomegranate tolerant of SOME flooding.
  19. Servicio Nacional de Sanidad y Calidad Agroalimentaria (2022). Certificacion de fruta de granadas desde San Juan exportadas a Estados Unidos. Senasa, Argentina, 13 April 2022. ✓
    The official statement that San Juan pomegranate harvest and export run from March to the first days of June, that the region is not fruit-fly free so US-bound fruit needs an in-transit cold treatment at 1.11 or 1.67 C for 15 or 17 days.
  20. University of California Cooperative Extension, Central Sierra. Pomegranate Production. ✓
    California extension anchors: dormant pomegranate wood withstands 10 F, but the tree is very sensitive before full dormancy in late fall and after buds swell in early spring, with trunk damage near the ground on the south and west sides reduced by painting trunks white. Wonderful matures in late September and October.
Industry & agency resources (3)
  1. CrackSense consortium (2026). Fruit Cracking in Pomegranate 2025: Pilot Findings. CrackSense project (Horizon Europe 101086300), 21 May 2026. ✓
    The only sensor-era cracking pilot in 'Wonderful'. Stem water potential WAS collected but did not appear among the top cracking predictors - fruit diameter, trunk diameter and canopy area did - an absence from a feature-importance write-up, not a measured ranking. The models did not generalise and no numbers were published.
  2. Diario de Cuyo / Agritotal (2015). Abrio el primer frigorifico de granadas en San Juan (interview with Jonatan Sued, Rimonim), 27 April 2015. ✓
    Anchors the San Juan pilot calendar: about 700 ha planted in the province, and a harvest that began in February with the early cultivar Acco and continued through March into the third week of April with 'Wonderful'.
  3. Diario Huarpe (2022). Por heladas tardias se perdio el 60% de la produccion en San Juan. Diario Huarpe (San Juan, Argentina), 2 November 2022. ✓
    A dated San Juan late-frost loss event: frosts hit in September and then on 31 October and 1 November 2022, causing a grower-reported 60 percent crop loss across nine departments including Sarmiento, described as one of the strongest events in 30 years. No temperatures were reported.
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