Native & adapted

Foothill palo verde

Parkinsonia microphylla

A slower, exceptionally drought-adapted native for hot, well-drained sites away from turf irrigation.

Sonoran nativePollinatorNitrogen fixerVery low water

Landscape layersUpper canopy

Mature size

15–25 ft tall × 15–25 ft wide

Climate fit

Valley suburbs · USDA 9a–9b · Desert outskirts · USDA 8b–9b

Special categories

SONORAN DESERT NATIVE · POLLINATOR ATTRACTING · NITROGEN FIXING

Hardiness guidance

USDA zones 8b–11; exceptionally drought- and heat-adapted

Before you plant

These conditions determine whether it will thrive.

Cold hardiness

Hardy here

Hardy to at least 20°F, and AMWUA rates it to 15°F. Phoenix winters never touch it.

Leaves and wood: damaged below 20°F

Heat tolerance

Takes full sun and heat

One of the most heat- and drought-tough trees around, best in full or reflected sun. It tolerates a little shade but grows leggy in it.

Sources:

amwua.org , desertmuseum.org

Right plant, right place

Will Foothill palo verde grow at your Arizona property?

The smaller, slower native palo verde for unirrigated or lightly irrigated desert landscapes. Avoid lawn conditions and chronically wet soil.

Best regional fit: Valley suburbs · USDA 9a–9b, Desert outskirts · USDA 8b–9b.

Light

Sun exposure

Full sun and excellent drainage.

Water

Irrigation

Very low. Establish deeply, then irrigate only occasionally in prolonged summer drought.

Choose the actual plant, not only the label

Cultivars & selections

Choose seed-grown local or regional provenance when possible. Foothill palo verde is naturally smaller and more drought-conservative than blue palo verde.

Local seed-grown foothill palo verde

Parkinsonia microphylla

Mature size15–25 ft tall × 15–25 ft wide

Best forThe driest native landscapes and smaller canopy roles

Usually grows about 1–2 ft per year under garden conditions and much more slowly without supplemental water. Seed-grown plants vary naturally in form.

Planting & stewardship

How to help Foothill palo verde thrive

1
Confirm the plant’s mature spread and underground conflicts before digging.
2
Place the root flare at finished grade and keep mulch away from the trunk.
3
Establish a wide, deep root zone instead of irrigating only at the trunk.
4
Observe seasonal growth, heat stress, and wildlife use before making major pruning changes.

Read the horticultural reference ↗