Palo Verde Plant Care

Palo Verde (Parkinsonia aculeata) belongs to the Fabaceae family within the Parkinsonia genus. Palo Verde is also known as Jerusalem Thorn, Mexican Palo Verde, Parkinsonia inermis.

Palo Verde displays a spreading, thorny tree growth habit, reaching up to 20 ft tall with a spread of approximately 20 ft. Palo Verde produces bright yellow, fragrant flowers in clusters.

Leaf size: approximately 2 inches.

Water a young or newly planted Palo Verde every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Palo Verde thrives in full sun.

Parkinsonia aculeata tolerates temperatures of 50–100°F. Palo Verde prefers humidity levels of 10–60%.

Well-draining sandy soil with low fertility. Good drainage is essential for Palo Verde to prevent waterlogging, which leads to root rot and fungal issues.

Feed Palo Verde every 8 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees in good soil often need little extra feeding, so let weak growth or pale foliage guide you.

Stop feeding by late summer so new growth can harden before winter.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Choose a spot with full sun and well-draining sandy soil with low fertility. Avoid low spots where water collects after rain.

Palo Verde is suited to USDA Zone 12a.

Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.

Palo Verde can spread to about 20 ft (6.1 m) and reach about 20 ft (6 m) tall. Space plants about 20 ft (6.1 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.

Planning a row or hedge? Try the tree spacing calculator.

Prune Palo Verde while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.

If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the tree in one year.

Palo Verde is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Palo Verde can be propagated through seeds. Similar propagation techniques also apply to african palo verde plant care, which shares the same genus.

See all plants toxic to cats and plants toxic to dogs.

Palo Verde is susceptible to aphids, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Palo Verde grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Palo Verde as a houseplant or bring it indoors before the first frost.