PlantFun
Plant Needs
Characteristics
- Leaf: Trifoliate, glossy green, aromatic when crushed; turns yellow in autumn
- Flower: White, fragrant, star-shaped blooms with five petals
- Stem/Bark: Thorny, gray-brown branches with sharp 2–3 cm spines
- Fruit: Small, round, green to yellow-orange citrus fruit with bitter pulp
Care Guide
Keep soil evenly moist; increase watering frequency during prolonged hot, dry spells
Apply balanced, slow-release fertilizer once monthly. Avoid over-fertilizing to prevent excessive foliage growth at the expense of flowering
Eggshell powder topdress：Crush dried, clean eggshells into fine powder; sprinkle 1 tablespoon around the base of the plant every 3 months to boost soil calcium and reduce blossom end rot- Prune in late winter to remove dead, diseased, or crossing branches and maintain desired shape
- Trim back overgrown branches to improve airflow and sunlight penetration
- Remove suckers growing from the base to prevent overcrowding and preserve plant energy
- Wear thick, puncture-resistant gloves to avoid injury from sharp thorns
Toxicity
Warning: this plant may be toxic.
Pets: ASPCA: Toxic due to essential oils and psoralens; ingestion may cause vomiting, diarrhea, and photosensitivity
Humans: Ingestion of large amounts of fruit or leaves may cause mild gastrointestinal upset; essential oils may irritate sensitive skin
Garden Uses & Culture
Culture: Used as a cold-hardy rootstock for commercial citrus trees; thorny branches symbolize protection in some cultural contexts
Usage: Ornamental garden plant; rootstock for citrus cultivation; bitter fruit used in traditional herbal remedies
