Garden Scheme

Plant library  ·  Ornamental & Flowering Trees

Desert Willow

Chilopsis linearis

Desert willow is a perennial woody focal plant for hot, sunny, low-water parts of the landscape. It reaches about 25 feet tall and 20 feet wide, bringing showy trumpet flowers from late spring into early fall. Use its height and broad canopy to give a dry garden a vertical anchor without crowding lower planting areas. Its North American native range and pollinator-friendly bloom make it a natural fit for a flowering, wildlife-minded plan.

  • Pollinator friendly
  • Deer resistant
  • Native to North America
Sunlight Full Sun
Water Low
USDA zones 7–11
Spacing 18 ft
Mature size 25 ft tall, 20 ft wide
Bloom Late spring - early fall

Placement and use

Give desert willow an open position in a xeriscape, gravel garden, or dry border where its flowering canopy can be seen from a patio, walk, or seating area. The habit can be trained as a small tree or allowed to develop as a large shrub, so reserve space for the branching structure rather than squeezing it into a narrow foundation bed. Keep the main trunk or stems far enough from paths that mature branches do not narrow circulation. Place lower sun-loving plants beyond the expected canopy edge rather than directly beneath the center.[1][2]

Spacing and mature footprint

Space plants 18 feet apart, center to center. This is slightly tighter than the eventual 20-foot spread, creating a lightly connected planting mass as canopies mature; use wider intervals where you want clear separation around each specimen. Allow the full 20-foot width when setting it near fences, walls, driveways, and neighboring trees. In mixed beds, place it toward the back or center of a large island bed, with room to approach its base for pruning and cleanup.

Three plants set 18 ft apart, center to center; shaded circles show the 20 ft mature spread.

Sun, water, and soil

Site this plant in full sun and keep it with other low-water planting zones rather than beside regularly irrigated beds. Well-drained soil is important for a workable long-term location, including dry or slightly alkaline ground. Use a raised or sloping area if that is the part of the garden that sheds water most freely. Once established, its drought tolerance suits spaces where summer irrigation is limited.[1]

Seasonal notes

Flowers carry the display from late spring into early fall, so leave open sightlines to the canopy during the warm season. The plant is deciduous, leaving more light through the planting area in winter. Plan nearby evergreen structure or winter-active perennials if the bed needs to hold its shape after leaf drop. Dormant-season pruning can be scheduled before the next growing season, with enough working room around the stems.[1][2]

Planning caveats

Leave room beyond the canopy for occasional access, especially if the plant is used beside a patio or walkway. Seedling spread may need monitoring where self-seeding into adjacent planting areas would complicate the design. Avoid locating it where a loose, open crown would be expected to make a dense year-round screen. Its 25-foot height also calls for a clear overhead position away from low structures.[2]

Growing facts

Botanical name
Chilopsis linearis
Type
Shrub
Category
Ornamental & Flowering Trees
Lifecycle
perennial
USDA hardiness zones
7–11
Sunlight
Full Sun
Water
Low
Plant spacing
18 ft
Mature size
25 ft tall, 20 ft wide
Bloom season
Late spring - early fall
Pollinator friendly
Yes
Deer resistant
Yes
Native to North America
Yes

References

  1. Chilopsis linearis - Plant Finder — Missouri Botanical Garden
  2. Willowleaf Catalpa - Chilopsis linearis — North Carolina Extension Gardener Plant Toolbox

Editorial content updated 2026-07-20.