• Bitter orange seeds for planting, Poncirus trifoliata, a hardy citrus relative with trifoliate green leaves, fragrant white flowers, and yellow-orange fruit.
  • Bitter orange seeds for planting, Poncirus trifoliata, a hardy citrus relative with trifoliate green leaves, fragrant white flowers, and yellow-orange fruit.
  • Bitter orange seeds for planting, Poncirus trifoliata, a hardy citrus relative with trifoliate green leaves, fragrant white flowers, and yellow-orange fruit.
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Eden Valley Seeds

Bitter Orange Seeds – Poncirus trifoliata Hardy Citrus Tree

Bitter Orange Seeds – Poncirus trifoliata Hardy Citrus Tree

$16.99 USD
$16.99 USD
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Key Features

  • Botanical name: Poncirus trifoliata, also known as trifoliate orange or hardy orange.

  • Deciduous, thorny citrus relative with distinctive three-part leaves.

  • Fragrant white flowers appear in spring, followed by small yellow-orange fruits.

  • Attractive ornamental tree for gardens, hedges, and landscape plantings.

  • Known for its cold hardiness compared with many other citrus plants.

Growing Benefits

  • Adds year-round garden interest with seasonal foliage, flowers, and fruit.

  • Creates a distinctive landscape feature with its unusual trifoliate leaves.

  • Provides fragrant spring blossoms that attract attention in the garden.

  • Offers an interesting citrus relative for adventurous home gardeners.

  • Can be trained as a dense, thorny hedge or ornamental tree.

Seed Specifications

  • Common Name: Trifoliate Orange, Hardy Orange, Bitter Orange

  • Botanical Name: Poncirus trifoliata

  • Plant Type: Deciduous, thorny woody shrub or small tree

  • Colors: Green foliage, white flowers, yellow to orange fruit

  • Height: Commonly about 8–20 feet at maturity

  • Sunlight: Full sun to partial shade

  • Soil: Well-drained, moderately fertile soil

  • Water: Moderate; keep young plants evenly moist

  • Germination Time: Variable; may take several weeks or longer

  • Sowing Depth: About ¼ inch

  • Spacing: Allow about 10–15 feet for a mature tree

  • Growing Zones: Generally USDA Zones 5–9, depending on conditions

  • Flowering/Maturity: Flowers in spring; fruit ripens in fall. Seed-grown plants may take several years to flower and fruit.

  • Uses: Ornamental planting, thorny hedges, citrus rootstock, and landscape interest

Growing Tips

  • Soak seeds in warm water before sowing to help soften the seed coat.

  • Use a deep pot with drainage holes to accommodate developing roots.

  • Protect young seedlings from extreme cold, heat, and drying winds.

  • Plant in a sunny location with enough space for mature growth.

Seed Storage

Store seeds in a cool, dry place away from direct sunlight. Keep them in a sealed, labeled container to protect them from moisture. For longer storage, refrigerate the seeds in an airtight container. Avoid freezing unless the seeds are properly dried and prepared for storage.

Unique Facts About Seeds

  • Trifoliate orange is a close relative of cultivated citrus, but it belongs to a separate genus.

  • Its leaves consist of three leaflets, giving the plant its distinctive botanical name.

  • The plant is unusually cold-hardy for a citrus relative and is often used as citrus rootstock.

  • Its small, fragrant flowers develop into round, yellow-orange fruits with a bitter, sour flavor.

Growing Instructions

Planting Season

Start seeds in spring when temperatures are becoming warmer. Seeds can also be started indoors during cooler months in a warm, protected environment.

Sowing and Depth

Use a well-draining seed-starting mix. Sow seeds about a quarter inch deep and cover lightly with soil. Keep the growing medium moist but not waterlogged.

Spacing

For outdoor planting, allow generous room for mature growth. Space plants according to their intended use, giving ornamental trees more room than plants grown for hedging.

Sunlight

Choose a location with full sun for the best growth and fruiting. Partial shade is tolerated, although flowering and fruit production may be reduced.

Soil

Plant in well-drained soil that is moderately fertile. Avoid locations where water collects around the roots.

Watering

Water regularly while seeds are germinating and seedlings are establishing. Once established, the plant is relatively adaptable, but prolonged drought can affect growth.

Germination

Germination can be slow and uneven. Keep the soil consistently moist and warm, and avoid disturbing the seeds while they develop. Fresh seeds generally perform better than seeds that have been stored for a long time.

Transplanting

Move seedlings outdoors once they are well established and the risk of severe frost has passed. Harden them gradually by exposing them to outdoor conditions before planting permanently.

Fertilizing

Apply a balanced fertilizer during active growth if the soil is poor or the plant shows signs of nutrient deficiency. Avoid excessive fertilizing, especially late in the growing season.

Care

Prune lightly to maintain the desired shape and remove damaged or crossing branches. Wear protective gloves when handling the plant because its long thorns can cause injuries.

Flowering and Maturity

Established plants typically flower in spring and produce fruit in autumn. Seed-grown plants may need several years to reach flowering and fruiting maturity.