Persimmon / Japanese persimmon (Diospyros kaki / Diospyros virginiana) growing guide

Quick facts

Category: fruiting
Difficulty: beginner
Days to harvest: 1095 to 1825 days
Harvest type: continuous production over weeks or months
Spacing: 360 cm between plants

Environment

Temperature: -25–32°C
pH: 6 to 7
EC (hydroponic): 1 to 1.6 mS/cm
Daily light: 22 to 34 mol/m²/day

Climate and zones

USDA zones: 4 to 10 (winter low around -34°C or warmer)
Frost tolerance: very hardy (survives deep cold)
Season: warm (summer crops, frost-sensitive)

Viable growing environments:

outdoor year-round (in zone)

USDA zone bounds reflect outdoor year-round survival. Anywhere outside the bounded zone range, this crop still grows as an annual in the warm months (outdoor_seasonal), under cover (greenhouse), or indoors under lights.

Growing systems

Persimmon works in:

soil bed

Root mass is very heavy - thin-channel systems (NFT, vertical towers) can't hold this crop mechanically, hence the system list above.

Growing media

The substrate the roots sit in. Choice depends on the system (clay pebbles don't fit NFT channels; rockwool isn't used in media beds) and the crop (persimmon works in the media listed below).

Medium	pH effect	Water retention	Bacterial surface
Soil-based mix (Potting soil)	varies by source	high	high

Bacterial surface area matters for aquaponics: clay pebbles, lava rock, and pumice double as biofilter substrate. Low-surface media (rockwool, perlite, pea gravel) work in hydroponics but need a separate biofilter in aquaponics.

Nutrient demand by stage

NPK ratios are relative weights at each growth stage; the nutrient mix calculator scales them to absolute grams or ml. EC targets shift through the plant's life: seedlings need a much lighter solution than fruiting adults.

Stage	N	P	K	EC target (mS/cm)
seedling	1	1	1	0.7
vegetative	2	1	2	1.3
flowering	1	1	2	1.4
fruiting	1	1	3	1.4

Companion-growing notes

High transpiration. Reservoir level will need regular top-ups during fruiting or flowering.

Aquaponics suitability

Not recommended for pure aquaponics. Fish waste alone doesn't provide enough of the nutrients this crop demands (typically potassium, calcium, or boron). It can be grown in a hybrid system where the reservoir is supplemented with hydroponic-style nutrients, but expect to dose actively.

Care notes

A fruit tree for outdoor aquaponics integration in temperate to warm climates. Container growing (50 L) or in-ground. EC 1.5-2.5 mS/cm. pH 6.0-7.5. Temperature: adaptable (D. kaki is hardy to zone 7; D. virginiana to zone 4). Full sun (DLI 18-25 mol/m2/day). Chilling requirement: 200-500 hours. Most Asian persimmon varieties are self-fertile (a single tree produces fruit). Fruiting begins at 3-5 years from grafted stock. Each mature tree produces 15–50 kg of fruit. Persimmon trees are nearly pest and disease free, requiring less management than apples, peaches, or cherries. For astringent types (Hachiya): harvest when fully colored but still firm, then ripen indoors until completely soft (the flesh should be jelly-like). Eating an unripe astringent persimmon is a memorable and unpleasant experience. For non-astringent types (Fuyu): harvest when fully orange and eat at any firmness. Dried persimmon (hoshigaki) is made by peeling firm fruit, hanging by the stem in a dry, airy location, and massaging periodically over 4-6 weeks.

Notable varieties

A starting shortlist of cultivars worth knowing about. Not exhaustive: the seed catalogs list hundreds of named varieties. These are the ones home growers commonly choose between.

Cultivar	Type	Days	Notes
Fuyu (Asian, non-astringent)	open-pollinated	1460	1214 Japanese cultivar, the standard non-astringent persimmon, what US supermarkets sell as 'persimmon' since 1990s. Flat orange tomato-shaped fruit, eat firm like an apple. Zones 7-10. Self-fertile. The variety to plant if you want to eat persimmons without learning the ripeness rules.
Hachiya (Asian, astringent)	open-pollinated	1460	Astringent cultivar, large heart-shaped orange fruit, MUST be eaten fully soft (jelly-textured) or it's inedible. Zones 7-10. The traditional Japanese hoshigaki (dried persimmon) variety. Same astringent compounds (tannins) in Hachiya as in unripe Fuyu, soft ripening transforms them.
American common (D. virginiana)	open-pollinated	1825	The eastern US native, zones 4-9, hardy to -25C. Small (3-5 cm) orange fruit, very sweet when fully ripe (after frost), the basis for Southern persimmon pudding and Indiana persimmon festivals. Mostly dioecious so need both male and female trees unless you have a self-fertile cultivar.
Saijo (Asian, astringent)	open-pollinated	1460	Older Japanese astringent cultivar, very cold-hardy for a kaki (zone 6-7). Elongated yellow-orange fruit. Considered one of the best-flavored astringent persimmons, often called the 'best persimmon in Japan' before Fuyu commercialization. Self-fertile.
Nikita's Gift (hybrid)	open-pollinated	1460	Ukrainian hybrid (D. kaki × D. virginiana), Nikita Botanical Garden 1979. Zones 5-9, the most cold-hardy large-fruited persimmon. Mid-sized round red-orange fruit, astringent until soft. Self-fertile. The Kaki-experience for cold-climate growers.