North America Native Plant

Broom Dalea

Botanical name: Psorothamnus scoparius

USDA symbol: PSSC6

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Dalea scoparia A. Gray (DASC7)   

Broom Dalea: A Desert Native That’s Perfect for Water-Wise Gardens If you’re looking for a drought-tolerant shrub that brings both beauty and ecological value to your landscape, let me introduce you to broom dalea (Psorothamnus scoparius). This charming desert native might just be the perfect addition to your water-wise garden ...

Broom Dalea: A Desert Native That’s Perfect for Water-Wise Gardens

If you’re looking for a drought-tolerant shrub that brings both beauty and ecological value to your landscape, let me introduce you to broom dalea (Psorothamnus scoparius). This charming desert native might just be the perfect addition to your water-wise garden – especially if you live in the southwestern United States.

What is Broom Dalea?

Broom dalea is a perennial shrub that’s perfectly adapted to life in America’s desert regions. As a member of the pea family, it produces lovely clusters of small purple to violet flowers that are absolutely irresistible to pollinators. The plant typically grows as a multi-stemmed woody shrub, usually staying under 13-16 feet tall, though most garden specimens remain much more compact.

You might also encounter this plant listed under its former scientific name, Dalea scoparia, but don’t let the name change confuse you – it’s the same wonderful desert dweller.

Where Does Broom Dalea Come From?

This native beauty calls the Sonoran and Chihuahuan deserts home, naturally occurring across Arizona, New Mexico, and Texas. It’s perfectly adapted to the harsh conditions of these desert regions, which is exactly why it makes such a stellar choice for gardeners dealing with similar challenging conditions.

Why You’ll Love Growing Broom Dalea

There are so many reasons to fall in love with this desert native:

  • Stunning seasonal display: Those purple pea-like flowers create a gorgeous show in spring and early summer
  • Pollinator magnet: Bees, butterflies, and other native pollinators absolutely adore the blooms
  • Drought champion: Once established, this plant thrives with minimal water
  • Low maintenance: Perfect for gardeners who want beauty without the fuss
  • Native authenticity: You’re supporting local ecosystems and wildlife
  • Attractive foliage: The silvery-gray to green leaves provide year-round interest

Perfect Spots for Broom Dalea

This versatile shrub shines in several garden settings:

  • Xeriscape and desert-themed gardens
  • Native plant landscapes
  • Water-wise residential plantings
  • Naturalistic garden designs
  • Mixed shrub borders in arid regions

The open, airy branching structure makes it an excellent choice for creating natural-looking plantings that don’t feel heavy or overwhelming in the landscape.

Growing Conditions and Care

The beauty of broom dalea lies in its simplicity. This plant thrives in USDA hardiness zones 8-10 and has some pretty straightforward needs:

Sunlight: Full sun is essential – this desert native needs those bright, sunny conditions to truly thrive.

Soil: Well-draining soil is absolutely crucial. Like most desert plants, broom dalea cannot tolerate waterlogged conditions and will quickly develop root problems in heavy, poorly-draining soils.

Water: Here’s where this plant really shines – it’s incredibly drought tolerant once established. During the first year, provide regular water to help establish the root system, then gradually reduce watering frequency.

Planting and Care Tips

Getting your broom dalea off to a great start is easier than you might think:

  • Timing: Plant in fall or early spring when temperatures are moderate
  • Spacing: Give plants plenty of room to develop their natural form
  • Establishment: Water regularly the first year, then reduce to occasional deep watering
  • Pruning: Light pruning after flowering can help maintain shape, but it’s rarely necessary
  • Fertilizing: Skip the fertilizer – this native prefers lean soils and too much nutrition can actually reduce flowering

The Bottom Line

Broom dalea is one of those wonderful plants that proves native doesn’t mean boring. With its gorgeous spring flowers, pollinator appeal, and nearly foolproof growing requirements, it’s an excellent choice for gardeners in the Southwest who want to create beautiful, sustainable landscapes. Plus, by choosing native plants like broom dalea, you’re supporting local wildlife and creating gardens that truly belong in their environment.

If you’re ready to embrace water-wise gardening without sacrificing beauty, broom dalea might just become your new favorite shrub. Just remember – good drainage is key, and less is definitely more when it comes to water and care!

Broom Dalea

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 scoparius (A. Gray) Rydb. - broom dalea

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