North America Native Plant

Smoketree

Botanical name: Psorothamnus spinosus

USDA symbol: PSSP3

Life cycle: perennial

Habit: shrub

Native status: Native to the lower 48 states  

Synonyms: Dalea spinosa A. Gray (DASP3)   

Desert Smoketree: The Ghost of the Desert Garden If you’ve ever driven through the southwestern deserts and spotted what looks like wisps of smoke rising from the landscape, you’ve likely encountered the enchanting Desert Smoketree. This remarkable native shrub, scientifically known as Psorothamnus spinosus, gets its ghostly appearance from its ...

Desert Smoketree: The Ghost of the Desert Garden

If you’ve ever driven through the southwestern deserts and spotted what looks like wisps of smoke rising from the landscape, you’ve likely encountered the enchanting Desert Smoketree. This remarkable native shrub, scientifically known as Psorothamnus spinosus, gets its ghostly appearance from its silvery-gray branches that seem to dance in the desert breeze like captured smoke.

What Makes Desert Smoketree Special?

Desert Smoketree is a true native treasure of the American Southwest, naturally occurring in Arizona, California, and Nevada. This perennial shrub belongs to the pea family and can live for decades, slowly growing into an architectural masterpiece that becomes more beautiful with age.

The plant’s most striking feature is its nearly leafless appearance for most of the year. Instead of relying on traditional foliage, the smoketree’s photosynthetic branches create that distinctive smoky, ethereal look that gives the plant its common name. You might also see it listed under its former scientific name, Dalea spinosa.

Why Choose Desert Smoketree for Your Garden?

There are several compelling reasons to consider this native beauty for your landscape:

  • Incredible drought tolerance: Once established, this plant thrives on minimal water, making it perfect for water-wise gardening
  • Year-round interest: The silvery branches provide structure and movement even when not in bloom
  • Spring flower show: Small purple flowers appear in clusters, creating a stunning contrast against the gray branches
  • Pollinator magnet: Desert bees and other native pollinators love the blooms
  • Low maintenance: Requires virtually no care once established

Perfect Garden Settings

Desert Smoketree shines brightest in:

  • Desert and xeriscape gardens
  • Southwestern-style landscapes
  • Rock gardens with good drainage
  • As a specimen plant or focal point
  • Modern, minimalist landscape designs

This shrub typically grows 6-15 feet tall and wide, so give it plenty of space to show off its architectural form. It works beautifully as a standalone specimen or paired with other desert natives like palo verde trees or brittlebush.

Growing Conditions and Care

Desert Smoketree is surprisingly easy to grow if you can provide the right conditions:

Climate: Hardy in USDA zones 9-11, this plant loves hot, dry conditions and can handle temperatures down to about 20°F.

Sunlight: Full sun is essential – at least 6-8 hours of direct sunlight daily.

Soil: Well-draining soil is absolutely critical. Sandy or rocky soils work perfectly, but avoid heavy clay or areas where water might collect.

Water: The key to success is restraint! Water deeply but infrequently during the first year to help establish roots, then reduce watering significantly. Mature plants can survive on rainfall alone in their native range.

Planting and Care Tips

Getting your Desert Smoketree off to a good start is crucial:

  • Best planting time: Fall or early spring when temperatures are moderate
  • Soil preparation: If your soil doesn’t drain well, plant in a raised bed or mound
  • Spacing: Allow 10-15 feet between plants for mature size
  • Establishment period: Water weekly for the first few months, then gradually reduce
  • Pruning: Minimal pruning needed – just remove dead or damaged branches

A Word of Caution

While Desert Smoketree is incredibly rewarding for the right garden, it’s not suitable for all climates or garden styles. This plant absolutely cannot tolerate wet conditions, high humidity, or frequent irrigation. If you live in a humid climate or have an automatically irrigated landscape, this beauty might not be the right choice for you.

The Bottom Line

Desert Smoketree is a stunning native plant that offers unique beauty, supports local wildlife, and thrives with minimal resources. If you’re gardening in the Southwest and want a conversation-starting plant that embodies the spirit of the desert, this ghostly beauty might be exactly what your landscape needs. Just remember: when it comes to water, less is definitely more!

Smoketree

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Psorothamnus Rydb. - dalea

Species

Psorothamnus spinosus (A. Gray) Barneby - smoketree

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA