Native & adapted

Chitalpa

× Chitalpa tashkentensis

A desert-willow hybrid with a broad flowering canopy; useful where a larger ornamental shade tree is desired.

Arid adaptedPollinatorFloweringThornless

Landscape layersUpper canopy

Mature size

20–35 ft tall × 20–30 ft wide

Climate fit

Urban core · USDA 9b–10a · Valley suburbs · USDA 9a–9b · Desert outskirts · USDA 8b–9b · High desert · USDA 6a–8b

Special categories

ARID ADAPTED · POLLINATOR ATTRACTING

Hardiness guidance

USDA zones 6–9; deciduous and more cold-hardy than many low-desert flowering trees

Before you plant

These conditions determine whether it will thrive.

Cold hardiness

Hardy here

Hardy into USDA zone 6, roughly -10°F, thanks to its catalpa parent. Phoenix winters never hurt it.

Leaves and wood: damaged below -10°F

Heat tolerance

Shade from late-afternoon sun

Less heat tough than desert willow and very prone to trunk sunscald. Keep it off west walls and reflected heat, give it some afternoon shade, and water regularly in summer.

Sources:

asu.edu

Right plant, right place

Will Chitalpa grow at your Arizona property?

Use where a 20–30 ft flowering canopy fits. The tree grows quickly—often 2–4 ft per year—so early branch selection matters.

Best regional fit: Urban core · USDA 9b–10a, Valley suburbs · USDA 9a–9b, Desert outskirts · USDA 8b–9b, High desert · USDA 6a–8b.

Light

Sun exposure

Full sun for dense growth and flowering.

Water

Irrigation

Low to moderate. Deep irrigation about every 10–14 days in summer supports its fast growth and flower display.

Choose the actual plant, not only the label

Cultivars & selections

Named clones make flower color more predictable than seedling-grown material.

Pink Dawn

× Chitalpa tashkentensis ‘Pink Dawn’

Mature size20–30 ft tall × 20–30 ft wide

Best forBroad flowering shade and pale pink blooms

The most familiar selection, with orchid-like pink flowers and a rounded canopy.

Morning Cloud

× Chitalpa tashkentensis ‘Morning Cloud’

Mature size20–30 ft tall × 20–30 ft wide

Best forPaler near-white flowers

Similar landscape scale with white to very pale pink blooms; verify the clone at purchase because nursery labels can be inconsistent.

Planting & stewardship

How to help Chitalpa 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 ↗