Ironwood Tree / Ironwood – Desert Horizon Nursery

Ironwood

Olneya tesota
Categories:
  ·  
Light
Water
Very low water once established. Water deeply and infrequently, allowing soil to dry between waterings. Occasional summer irrigation supports growth; newly planted trees need more regular watering while establishing.
Toxicity
Description
Long-lived Sonoran Desert native tree with dense, gray-green foliage, thorny branches, exceptionally hard wood, and showy spring flowers.
Deciduous / Evergreen
Growth Rate
Flower Color
Foliage Color
Not established — verify
Care Instructions

Light: Full sun; thrives in Phoenix heat and reflected sunlight.

Water: Very low water once established. Water deeply and infrequently, allowing soil to dry between waterings. Occasional summer irrigation supports growth; newly planted trees need more regular watering while establishing.

Soil: Well-drained sandy, gravelly, or rocky soil; tolerates alkaline desert soils. Avoid poorly drained sites.

Mature size: Generally 20–30 feet tall and wide; very old trees may grow larger.

Bloom: Clusters of flowers in late spring, usually April–May in Phoenix; flowering intensity varies with rainfall and weather.

Evergreen / deciduous: Mostly evergreen; may shed leaves during drought, cold weather, or shortly before flowering.

Growth rate: Slow; somewhat faster with careful supplemental irrigation.