PlantFun
Plant Needs
Sunlight
Full sun preferred for optimal growth; tolerates partial shade in hot, arid regions
Watering
Deep, infrequent watering; drought-tolerant once established; avoid overwatering
Temperature
Extremely cold-hardy; tolerates hot, dry summers and freezing winter temperatures
Characteristics
- Leaf: Bipinnate, bright green compound leaves; turn golden yellow in autumn
- Flower: Small, greenish-yellow, fragrant racemes clustered along branches
- Stem/Bark: Gray-brown furrowed bark; young trees have sharp, branched thorns up to 20 cm long
- Fruit: Flat, twisted brown seed pods up to 40 cm long, ripening in late autumn
Care Guide
Watering
Deep water every 7-10 days during prolonged dry spells
Fertilization
Apply balanced slow-release fertilizer once in early spring. Fertilize only if soil is nutrient-poor; avoid over-fertilization to prevent excessive leaf growth
Eggshell powder topdress：Sprinkle finely ground, dried eggshells around the tree base; avoid direct contact with trunk to prevent fungal growthPruning
- Remove dead, damaged, or crossing branches in late winter while dormant
- Trim lower branches to raise canopy height for pedestrian or vehicle clearance
- Thin crowded inner branches to improve airflow and reduce disease risk
- Remove thorny suckers at the base to maintain a clean, formal form
Toxicity
Warning: this plant may be toxic.
Pets & Humans
Pets: ASPCA: Non-toxic to cats; no systemic health risks
Humans: No known toxic compounds; seed pods may cause mild gastrointestinal upset if ingested in large quantities
Garden Uses & Culture
Culture: Symbolizes resilience and protection in some North American Indigenous traditions
Usage: Urban shade tree, erosion control, wildlife food source for deer and birds
