Saijo Persimmon

Saijo is a traditional astringent cultivar of Diospyros kaki originating in Shimane Prefecture on the western Honshu coast of Japan, where it has been cultivated for centuries and is historically considered among the highest-quality persimmons in the Japanese pomological tradition; the name translates approximately as “the very finest one” or “best quality.” It belongs to the pollination-constant astringent (PCA) class, meaning astringency is present regardless of pollination and requires complete tannin conversion at the jelly-soft stage. No formal breeding program or controlled cross produced Saijo; it is an ancient clonal selection propagated through grafting, with no documented parentage in available Western or Japanese sources. Like other Japanese kaki cultivars, it was introduced to North American commerce through the USDA’s late-nineteenth and early-twentieth-century persimmon introduction programs, which distributed grafted trees of Japanese and Chinese origin to California and the American South beginning in 1870. Its elongated, conical fruit shape, nearly seedless character, and relatively low chill requirement for a kaki cultivar have made it a preferred specialty variety in mild-winter regions of the American Southeast and Pacific Coast.

Saijo's deep taproot is its most consequential cultural trait: once established over two to three seasons, it taps subsoil moisture reserves that make the tree highly drought-tolerant, but that same taproot is why bare-root or young container stock requires attentive watering until anchored. Site selection in full sun is essential — fewer than six to eight hours of direct light per day delays fruit ripening and reduces sugar accumulation. Soil pH in the 6.0–6.5 range keeps iron and manganese available; alkaline soils cause leaf chlorosis that stunts growth over time. Saijo tolerates clay loam and sandy loam alike as long as drainage is adequate — standing water for even short periods promotes crown gall and root decay. Fertilize lightly with a balanced low-nitrogen source in early spring; excess nitrogen pushes vegetative growth at the expense of fruit set and can increase susceptibility to Botryosphaeria canker. In zones 6 and 7, plant against a south-facing slope or structure to bank heat units and protect young wood from late spring frosts during bloom, which runs mid-April through late May.

USDA Hardiness Zone: 6-9
AHS Heat Zone: 3-9
Chill Hours: 200-400
Sun Requirements: Full Sun
Soil pH: 6.0-6.5
Soil Type: Loam, sandy loam, clay loam; adaptable to a wide range of soil types
Soil Drainage: Well-drained; does not tolerate wet or waterlogged soils
Water Requirements: Medium; drought-tolerant once established
Drought Tolerance: Moderate to High (once established; taproot harvests deep moisture)
Heat Tolerance: High; tolerates heat and humidity well

At maturity Saijo typically reaches 15 to 25 feet tall with a spread of 10 to 18 feet, developing an upright rounded crown that broadens naturally as scaffold branches extend with age. The growth rate of roughly 12 to 18 inches per year is moderate for a fruiting tree, which means the canopy fills in over five to eight years without demanding constant corrective pruning. Structural work in the first three years should focus on establishing three to five wide-angled scaffold limbs; after that, Saijo requires only light annual thinning to maintain airflow through the interior. The glossy dark green summer foliage is ornamentally attractive, and the fall color progression through gold, orange, and red rivals dedicated landscape trees. Because the deep taproot system is sensitive to transplanting, permanent placement matters — avoid sites where future construction or soil disturbance could sever main roots. The upright habit and lack of thorns make Saijo compatible with lawn edges, food forest canopy layers, and narrow back-property plantings where a 15-foot-wide crown can be accommodated.

Mature Height: 15-25 ft tall
Mature Spread: 10-18 ft wide
Growth Habit: Upright, rounded crown; spreading with age
Growth Rate: Moderate (12-18 inches per year)
Foliage Type: Deciduous
Food Forest Layer: Canopy
Permaculture Role: Canopy tree; food producer; wildlife attractor; mineral accumulator (deep taproot)
Leaf Color: Glossy dark green (summer); yellowish-green when emerging in spring
Fall Foliage Color: Gold, orange, red
Thorns?: No
Attracts Wildlife: Birds (mockingbirds, blue jays, cedar waxwings, cardinals); mammals (deer, raccoons, squirrels, opossums)
Life Span: 40-60+ years productive life on grafted trees

Saijo is functionally self-fertile: female flowers set parthenocarpic fruit without pollination, producing the nearly seedless flesh the variety is known for. Bloom runs mid-April through late May in a temperate climate, with creamy white to pale yellow-green female flowers opening on current-season growth. Adding a second Diospyros kaki cultivar — such as Hachiya, Fuyu, or Izu — within 50 feet increases fruit set, seed count, and total yield, though seeded fruit loses some of the seedless quality Saijo is prized for. Pollination is primarily by bees, so avoid broad-spectrum insecticide applications during the bloom window. Because Saijo produces reliable crops as a solo tree, it is well suited to small lots and urban orchards where space for a second tree is limited. If cross-pollination is wanted for yield improvement, any D. kaki cultivar with overlapping bloom timing qualifies as a compatible partner.

Bloom Season: Very Early
Bloom Window: Mid Apr - Late May
Pollination Requirements: Self-Fertile; cross-pollination improves yield and seed set
Pollination Mechanism: Insect-pollinated (bees); parthenocarpic fruit set possible (seedless without pollination)
Flower Color: Creamy white to pale yellow-green (female flowers); light pink to white (male flowers if present)

Saijo produces elongated, conical fruit averaging 1.5 to 2 inches in diameter, with a thin, smooth skin that shifts from pale yellow-orange to deep orange at full ripeness. The flesh carries a concentrated honeyed flavor with brown sugar notes and faint apricot or mango undertones — Brix values on fully soft-ripe fruit typically run 20–25, placing it among the sweetest kaki cultivars in university taste evaluations. As an astringent type, Saijo must be soft-ripe before eating; high soluble tannin content in underripe fruit causes mouth-drying astringency and digestive discomfort. When fully ripe the flesh becomes custardy and translucent, with minimal seed development in parthenocarpic fruits. Mature trees produce 50 or more pounds annually, harvested late September through mid-November. Fresh shelf life is short — one to two weeks refrigerated — but Saijo's elongated shape makes it the traditional preferred cultivar for hoshigaki, the Japanese dried persimmon technique that extends storage to two to three months. It also suits persimmon puddings, baked goods, and jams.

Ripening Season: Very Early
Harvest Window: Late Sep - Mid Nov
Fruit Size: 1.5-2 inch
Flavor: Intensely sweet, honeyed flavor with notes of brown sugar and hints of apricot or mango; jelly-like when fully ripe; astringent until soft-ripe
Fruit Color: Pale yellow-orange when young; deepens to bright orange at full ripeness; skin may wrinkle and become translucent
Fruit Texture: Soft, custardy, jelly-like when fully ripe; translucent orange flesh; nearly seedless
Fruit Skin: Thin, smooth skin; pale yellow-orange maturing to deep orange; may wrinkle when fully soft-ripe
Bearing Habit: Annual bearer; consistent heavy crops on vigorous upright tree
Years to Bear: 2-4 years (grafted trees)
Storage Life: Short fresh shelf life (1-2 weeks refrigerated when soft-ripe); dried (hoshigaki) stores 2-3 months
Culinary Uses: Fresh eating (when fully soft-ripe); traditional Japanese dried persimmons (hoshigaki); persimmon pudding; baked goods (cookies, cakes, bread); jams and preserves; smoothies; salads

Saijo carries moderate susceptibility across all five tracked diseases, so cultural management matters more than varietal resistance. Persimmon Anthracnose (Colletotrichum horii) infects fruit and leaves in humid conditions; remove fallen leaves and mummified fruit promptly, and prune for airflow to reduce leaf wetness after rain. Cercospora Leaf Spot (Cercospora kaki) produces angular brown lesions under similar conditions — the same sanitation and airflow practices that address anthracnose suppress Cercospora simultaneously. Botryosphaeria Stem Canker (Botryosphaeria dothidea) enters through wounds and drought-stressed wood; maintain adequate soil moisture during establishment and seal pruning cuts larger than one inch. Crown Gall (Agrobacterium tumefaciens) enters through root wounds at planting — use certified disease-free nursery stock and avoid wounding roots during installation. Alternaria Leaf Spot (Alternaria alternata) is a late-season cosmetic concern; healthy trees tolerate it without yield loss. Scale Insects (Diaspididae and Coccidae species) colonize bark; treat with OMRI-listed horticultural oil during the crawler stage. Twig Girdler (Oncideres cingulata) females notch small branches in late summer to oviposit — remove and destroy girdled twigs before they fall. Persimmon Psylla (Trioza diospyri) and Flatheaded Appletree Borer (Chrysobothris femorata) show moderate resistance on Saijo; the borer is best managed by keeping trees vigorous, as stressed wood attracts egg-laying females.

Cercospora Leaf Spot: Moderately Susceptible
Persimmon Wilt: Moderately Susceptible
Botryosphaeria Canker and Dieback: Moderately Susceptible
Anthracnose: Moderately Susceptible
Alternaria Leaf Spot: Moderately Susceptible
Persimmon Borer: Susceptible
Persimmon Psyllid: Moderately Resistant
White Peach Scale: Moderately Susceptible
Twig Girdler: Moderately Susceptible

• Wait for full soft-ripeness: Saijo is astringent — harvest after the first frost or when fruit yields to light pressure and skin turns deep orange; eating it firm causes intense mouth-drying astringency.
• Anchor young trees before reducing water: The taproot that eventually provides drought tolerance takes two to three full seasons to establish; irrigate consistently until then to avoid transplant failure.
• Remove girdled twigs immediately: Twig Girdler activity peaks in late summer; inspect after August and cut off notched or hanging twigs before eggs hatch, reducing the following year's population significantly.
• Prune minimally after year three: Saijo bears on current-season growth from established spurs; heavy pruning delays fruiting and removes productive wood without improving tree structure.
• Try hoshigaki for extended storage: Saijo's elongated shape and high sugar content make it well suited for the Japanese dried persimmon process — peel while still firm, hang in cool dry air, and massage the fruit periodically to crystallize the sugars.

Our 365-Day Plant Guarantee: We ensure that our plants are delivered to you alive and healthy. If your plant does not survive its first year, you're eligible for store credit under these conditions:

1. Your location falls within the appropriate USDA hardiness zone for the plant variety (refer to our hardiness zone map).
2. You maintain the roots' moisture and plant within three days of delivery, following the instructions in our Planting Guide.

If you're concerned about your plant's health, please consult our guide, How to Tell if Your Tree is Dead or Dormant. Remember, our plants are shipped in a dormant state and may leaf out at different times based on their species. To check for plant vital