North America Native Plant

Whiting’s Dalea

Botanical name: Psorothamnus thompsoniae var. whitingii

USDA symbol: PSTHW

Life cycle: perennial

Habit: shrub

Native status: Native to the lower 48 states  

Synonyms: Dalea whitingii Kearney & Peebles (DAWH3)   

Whiting’s Dalea: A Hidden Gem for Western Native Gardens Meet Whiting’s dalea (Psorothamnus thompsoniae var. whitingii), a charming native shrub that deserves a spot in every southwestern garden. This unassuming little plant packs a big punch when it comes to supporting local wildlife while requiring almost zero fuss from busy ...

Rare plant alert!

Region: Conservation status by state

Status: S3?T2: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Whiting’s Dalea: A Hidden Gem for Western Native Gardens

Meet Whiting’s dalea (Psorothamnus thompsoniae var. whitingii), a charming native shrub that deserves a spot in every southwestern garden. This unassuming little plant packs a big punch when it comes to supporting local wildlife while requiring almost zero fuss from busy gardeners. If you’re looking for a drought-tolerant beauty that actually belongs in your landscape, you’ve found your match!

What Makes Whiting’s Dalea Special?

This perennial shrub is a true native of the American Southwest, calling Arizona, Colorado, and Utah home. Whiting’s dalea (also known by its synonym Dalea whitingii) is a multi-stemmed woody plant that typically stays compact at under 13-16 feet tall, making it perfect for smaller gardens or as an accent plant in larger landscapes.

What really sets this plant apart is its ability to thrive in tough conditions while providing essential resources for local wildlife. The delicate purple to lavender pea-like flowers appear in clusters, creating a lovely contrast against the silvery-green foliage that gives the plant an almost ethereal appearance.

Garden Design and Landscape Role

Whiting’s dalea shines brightest in:

  • Desert and xeriscape gardens
  • Native plant landscapes
  • Rock gardens and slopes
  • Wildlife habitat gardens
  • Low-maintenance border plantings

This shrub works beautifully as an accent plant, providing texture and seasonal interest without demanding constant attention. Its compact size makes it ideal for smaller spaces, while its natural form eliminates the need for frequent pruning.

Supporting Local Wildlife

One of the best reasons to grow Whiting’s dalea is its value to pollinators. The flowers attract bees, butterflies, and other beneficial insects, making your garden a hub of activity during blooming season. As a native plant, it has co-evolved with local wildlife and provides resources that non-native plants simply can’t match.

Growing Conditions and Care

Here’s where Whiting’s dalea really wins over gardeners – it’s remarkably easy to grow once you understand its preferences:

Sunlight: Full sun is essential for best flowering and compact growth.

Soil: Well-draining sandy or rocky soil is ideal. This plant absolutely cannot tolerate waterlogged conditions.

Water: Minimal water requirements once established. Water deeply but infrequently during the first growing season, then rely mainly on natural precipitation.

Hardiness: Thrives in USDA zones 5-9, handling both cold winters and hot summers like a champ.

Planting and Care Tips

  • Plant in spring after the last frost for best establishment
  • Space plants according to mature size to ensure good air circulation
  • Avoid fertilizing – these plants prefer lean, nutrient-poor soils
  • Prune lightly after flowering if needed, but the natural form is usually best
  • Mulch around the base with gravel or decomposed granite rather than organic mulch

A Word About Conservation

Whiting’s dalea has a conservation status that suggests it may be uncommon in parts of its range. If you’re interested in growing this special plant, make sure to source it from reputable native plant nurseries that propagate their own stock rather than wild-collecting. This ensures you’re supporting conservation efforts rather than potentially harming wild populations.

Is Whiting’s Dalea Right for Your Garden?

If you garden in the Southwest and love the idea of a beautiful, low-maintenance native plant that supports local wildlife, Whiting’s dalea could be perfect for you. It’s ideal for gardeners who want to create sustainable landscapes that work with nature rather than against it.

However, this plant isn’t suited for gardens with heavy clay soil, poor drainage, or high water requirements. It also needs full sun to perform its best, so shady gardens should look elsewhere.

For those lucky enough to garden within its native range, Whiting’s dalea offers the perfect combination of beauty, ecological value, and easy care – a true win-win for both gardener and nature!

Whiting’s 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 thompsoniae (Vail) S.L. Welsh & N.D. Atwood - Thompson's dalea

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