How to Grow Satsuma Mandarin 'Kimbrough'

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Satsuma Mandarin 'Kimbrough'

Citrus unshiu 'Kimbrough'

tree

Kimbrough is a cold-hardy satsuma mandarin cultivar that produces seedless, easy-to-peel fruit with excellent flavor. This dwarf to semi-dwarf tree is highly valued for its ability to withstand freezing temperatures better than most citrus varieties. It is ideal for home gardeners in marginal citrus-growing regions.

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Example Satsuma Mandarin 'Kimbrough' timeline · Pittsburgh, PA (Zone 6b)

Plant Satsuma Mandarin 'Kimbrough'
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Satsuma Mandarin 'Kimbrough'
Late summer into fall

Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Satsuma Mandarin 'Kimbrough' dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun, 8+ hours daily

💧

Water: Moderate and consistent; water deeply 1-2 times weekly during growing season. Allow soil to dry slightly between waterings. Reduce watering in winter. Avoid waterlogging, which causes root rot.

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Spacing: 180 inches

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Days to maturity: 2-3 years to first significant fruit production; mature tree

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Planting depth: Plant at same depth as nursery pot; graft union should be 4-6 inches above soil line

Soil

Type: Well-draining sandy loam to clay loam

pH: 6.0-7.5

Amendments:

Compost peat moss sulfur (if pH too high) citrus-specific fertilizer blend

Growing Zones

Find your zone →

Thrives in zones 8-10; exceptionally cold-hardy for a mandarin

8a 8b 9a 9b 10a 10b

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Growth Stages

Establishment (Year 1)

12 months

Young tree focuses on root development and canopy structure. Minimal fruiting; leaves are glossy green and vigorous.

Remove any flowers the first year to redirect energy to roots. Water regularly and deeply. Apply 2-3 inches of mulch. Stake if needed for wind protection.

Young Growth (Year 2-3)

24 months

Tree develops stronger scaffold branches and secondary growth. Light flowering may occur; some fruit can set.

Prune to establish open vase shape. Allow limited fruit to develop (thin to highest-quality fruit). Continue consistent watering and fertilizing monthly during growing season.

Flowering (Spring)

2-4 weeks

Fragrant white blossoms appear on branch terminals, typically March-April. Flowers last 1-2 weeks.

Ensure adequate irrigation during flowering. Do not over-fertilize nitrogen, which reduces flowering. Protect from hard freezes if in zone 8.

Fruit Development (Summer-Fall)

5-6 months

Small green fruits develop from pollinated flowers, gradually enlarging and changing color from green to yellow-orange by October-November.

Thin fruit if overcrowded (one fruit per 6-8 inches of branch). Maintain consistent watering. Fertilize with potassium-rich blend to improve fruit quality and sugar content.

Harvest (November-January)

8-10 weeks

Fruit reaches full sweetness and color; skin is bright orange and loosely adheres to flesh, making peeling easy.

Harvest when fully colored; Satsumas do not ripen after picking. Use pruning shears to avoid tearing branches. Prune lightly after harvest to shape tree.

Companion Planting

Plan your garden →

Plant with:

Herb circles (rosemary, lavender) Citrus underplanting (dwarf varieties) Nitrogen-fixing legumes at distance

Avoid planting near:

Black walnut Eucalyptus Other citrus (closer than 6 feet to reduce disease pressure)

Common Pests

Monitor for small jumping insects; use sticky yellow traps. Apply neem oil or insecticidal soap if spotted. Report to agricultural extension if suspected.
Spray horticultural oil in dormant season. Hand-remove on small trees. Use insecticidal soap on active crawlers.
Increase humidity with regular misting. Spray with water to dislodge. Use miticide only if severe.
Remove infested leaves. Avoid nitrogen over-fertilization that promotes tender new growth. Use spinosad if needed.
Yellow sticky traps; horticultural oil spray; insecticidal soap.

Uses

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Fresh eating and peeling

Culinary

Kimbrough is prized for seedless fruit with very loose, thin skin that peels away effortlessly, making it ideal for eating out of hand. The mild-sweet flavor and tender segments are perfect for children and convenient snacking. [source]

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Juice and preserves

Culinary

The juice is sweet and flavorful, suitable for fresh juice or blending. Segments can be used in salads, desserts, or preserved as marmalade. [source]

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Cold-hardy ornamental

Household

Kimbrough's attractive glossy foliage, fragrant spring blossoms, and bright orange winter fruit make it an excellent ornamental landscape specimen, especially in cooler citrus zones. [source]

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Vitamin C and immune support

Medicinal

Satsuma mandarins are rich in vitamin C, vitamin A, and antioxidants that support immune function and overall health. A single fruit provides significant daily nutritional value. [source]

🦋

Pollinator and wildlife habitat

Wildlife

Spring flowers attract bees, butterflies, and other pollinators. Mature trees provide cover and food for beneficial insects and birds. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Kimbrough mandarins are ripe November through January in most growing regions. Harvest when skin is fully orange and fruit yields slightly to gentle pressure. Cut with pruning shears rather than pulling to avoid branch damage. Unlike many citrus, Satsumas do not continue ripening off the tree, so wait until peak sweetness. Store at room temperature for a few days or refrigerate up to 2-3 weeks.

Fun Facts

🌱 Kimbrough can tolerate temperatures as low as 12-15°F (-11 to -9°C), making it the most cold-hardy satsuma mandarin cultivar—it can be grown in zone 8 with winter protection, a rarity for true citrus.
🌱 The name 'Satsuma' comes from the Satsuma Province in Japan (now Kagoshima), where these mandarins have been cultivated for centuries and are considered a symbol of longevity.
🌱 Unlike most citrus, satsuma mandarins are seedless (parthenocarpic) due to lack of viable pollen, though cross-pollination by other citrus can increase fruit set and yield.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Cultivar Full Sun Mulch

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