Orange Owari Satsuma
Orange Owari Satsuma
Location on Farm:
🌱 Planting Installation
Owari Satsuma Mandarin is one of the most popular, cold-hardy, and reliable sweet citrus varieties in the world. Originating in Japan, this evergreen fruit tree is prized by home gardeners and commercial growers for its heavy yields of easy-peeling, seedless fruit and its remarkable resilience to freezing weather. The Orange Owari Satsuma produces medium-sized, slightly flattened (oblate) mandarins with vibrant orange flesh. The segment walls are paper-thin, delivering a sweet, juicy, low-acid flavor that is virtually 100% seedless. The oranges feature loose, pliable skin that separates effortlessly from the flesh, making it one of the easiest citrus fruits to peel by hand. Overall, the Orange Owari Satsuma grows as a small, weeping tree with dark, glossy foliage and thornless branches, reaching 8 to 12 feet tall (or 4 to 6 feet on dwarf Flying Dragon rootstocks). Its manageable size makes it an ideal candidate for patio containers or small yards.
| Scientific Name | Citrus unshiu 'Owari' (Owari Satsuma Mandarin / Satsuma Orange) |
| Foliage: Evergreen |
Dense, broad, weeping canopy with a low-branching habit and thornless or nearly thornless branches. Leaves: Lanceolate to elliptical, 3–5 inches long; dark glossy green, slightly thick and leathery with narrow winged petioles Fruit: Medium-sized, slightly flattened (oblate) mandarin; easy-peeling, loose zipper-skin that turns brilliant orange at maturity; juicy, sweet, low-acid, seedless orange flesh Seeds: Seedless (typically 0 seeds per fruit due to parthenocarpy) Bark: Smooth, greenish-brown on young branches, turning gray-brown and slightly textured with age |
| Life Span: Perennial | 50+ years (when grafted onto hardy rootstocks like Poncirus trifoliata) |
| Mature Height | Standard: 8–12 ft; Dwarf (Trifoliata/Flying Dragon rootstock): 4–6 ft |
| Mature Width (Spread) | 8–10 ft (spreading, droopy canopy) |
| Growth Rate | Slow to Moderate |
| USDA Zones/Chill Hours | Zones 8a–11 (One of the most cold-tolerant sweet citrus; established trees survive brief dips down to 15°F to 18°F / -8°C to -9°C); Requires 150–250 chill hours |
PLANT CARE & CHARACTERISTICS
Light Requirements: Full Sun (Requires 8+ hours of direct sunlight daily for high fruit production and sweetness).
Water Requirements: Moderate; needs consistent moisture during fruit set and development; allow top 2–3 inches of soil to dry out between waterings.
Drought Resistance: Moderate once established, but prolonged drought causes fruit drop and small, dry fruit.
Soil Type: Deep, sandy loam or rich loamy soil enriched with organic matter; requires excellent drainage; pH 6.0–7.0 (dislikes soggy roots).
Deer Resistance: Moderate to High (Aromatic citrus foliage is generally avoided by deer)
Pest / Disease Resistance: Resistant to Citrus Canker; susceptible to Citrus Rust Mites, Scale, Asian Citrus Psyllid, and Phytophthora Root Rot in poorly draining soils.
Pollination: Self-fertile (Self-fruitful); sets seedless fruit parthenocarpically without requiring a second pollinator tree.
Harvest: Early season (typically November through December; fruit often ripens and turns sweet while skin retains a slight green blush).
Yield Timeline by Tree Age
Years 1–2: Minimal to No Yield (It is best practice to strip young fruit during the first 2 years so energy goes toward root and canopy establishment).
Year 3 (First Harvest): 15 – 30 lbs (~60 to 120 mandarins).
Years 4–5: 40 – 80 lbs as the canopy fills out.
Years 6+ (Peak Maturity): 100 – 200+ lbs annually under proper care, irrigation, and nutrition.
Peak Maturity Yield
| Tree Size | Average Annual Yield (Lbs) | Number of Fruit (Approx.) |
| Standard (8–12 ft) | 100 – 200+ lbs | ~400 to 800 mandarins |
| Semi-Dwarf (6–8 ft) | 60 – 100 lbs | ~250 to 400 mandarins |
| Dwarf / Container (4–6 ft) | 20 – 50 lbs | ~80 to 200 mandarins |
Factors Influencing Owari Satsuma Yields
1. Alternate Bearing Mitigation: Satsumas can fall into a pattern of "alternate bearing" (a massive crop one year followed by a light crop the next). Thinning heavy crops early in the season or picking fruit promptly upon maturity in late fall/early winter helps stabilize year-to-year yields.
2. Cold Protection: While Owari is exceptionally cold-hardy (tolerating dips down to 15°F–18°F), severe freezes in late winter can damage fruiting wood or flower buds, reducing the following season's yield.
3. Nutrient Needs (Nitrogen & Potassium): Citrus trees are heavy feeders. Regular applications of balanced citrus fertilizer during active spring and summer growth encourage healthy canopy development and prevent premature fruit drop.
4. Water Management During Fruit Set: Drought stress during spring flowering or early summer fruit set will cause the tree to shed small green fruitlets, drastically lowering the season's final yield.
Storage / Shelf Life: Excellent for a soft-peel mandarin; stores on the tree well into winter or under refrigeration (45°F–50°F) for 2 to 4 weeks.
Pruning: Low maintenance; prune in late winter/early spring after harvest to remove deadwood, crossing branches, or suckers below the graft union. Avoid heavy pruning as fruit bears on branch tips.
