Parkinsonia aculeataJerusalem Thorn

The Parkinsonia aculeata, commonly known as Jerusalem Thorn, Mexican Palo Verde, or Horse Bean, is a fast-growing, drought-tolerant deciduous tree native to arid and semi-arid regions of the Americas. It is well-known for its feathery, bright green foliage, spiny branches, and striking yellow flowers. Growing up to 6 to 9 metres, this tree has a graceful, airy appearance and is often used for shade, ornamental planting, or erosion control in dry landscapes.

Specifications

• Height6 to 9 metres
• Width4 to 6 metres (canopy spread)
• Native toTropical and subtropical Americas (from the southern United States to South America)
• FoliageFine, feathery bipinnate leaves with small leaflets; deciduous in dry seasons
• Growth rateFast

Conditions

• SoilPrefers well-drained, sandy, or rocky soils; tolerates poor and alkaline soils
• LightFull sun
• WaterVery low; highly drought-tolerant once established
• ClimateThrives in arid, semi-arid, and subtropical regions

Additional Features

• FlowersBright yellow, fragrant flowers with orange markings bloom profusely in spring and summer, attracting pollinators like bees and butterflies
• Seed PodsLong, narrow pods contain seeds that are often consumed by wildlife
• UsesIdeal for ornamental planting, erosion control, windbreaks, and xeriscaping
• SpacingPlant 4 to 6 metres apart for individual growth or windbreaks
• Low MaintenanceRequires minimal care; prune to shape or control spread
• Pest ResistanceGenerally resilient, though it may attract some caterpillars or scale insects
• Drought ToleranceExceptionally suited for low-water and desert landscapes
• Environmental BenefitsProvides shade, prevents soil erosion, and supports wildlife habitats

The Jerusalem Thorn is a visually striking and functional tree, perfect for arid and semi-arid landscapes. Its adaptability, vibrant flowers, and low water requirements make it a valuable addition to xeriscapes, urban landscapes, and sustainable planting projects.