North America Native Plant

Crandall’s Beardtongue

Botanical name: Penstemon crandallii atratus

USDA symbol: PECRA

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Penstemon crandallii A. Nelson var. atratus (D.D. Keck) N.H. Holmgren (PECRA2)   

Crandall’s Beardtongue: A High-Elevation Native Gem for Your Garden If you’re looking to add a splash of purple to your rock garden while supporting local ecosystems, Crandall’s beardtongue (Penstemon crandallii atratus) might just be the perfect native plant for you. This charming perennial brings both beauty and ecological value to ...

Rare plant alert!

Region: Conservation status by state

Status: S4T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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. ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

Crandall’s Beardtongue: A High-Elevation Native Gem for Your Garden

If you’re looking to add a splash of purple to your rock garden while supporting local ecosystems, Crandall’s beardtongue (Penstemon crandallii atratus) might just be the perfect native plant for you. This charming perennial brings both beauty and ecological value to gardens across its native range, though it does require some special consideration due to its conservation status.

Meet This Mountain Native

Crandall’s beardtongue is a true native of the American West, calling only Colorado and Utah home. This herbaceous perennial belongs to the snapdragon family and showcases the classic beardtongue flower form that pollinators absolutely adore. As a forb (a fancy botanical term for a non-woody flowering plant), it dies back to the ground each winter and emerges fresh each spring, ready to put on another spectacular show.

Why Your Garden (and Local Wildlife) Will Love It

There’s something magical about growing a plant that’s been thriving in your local mountains for thousands of years. Crandall’s beardtongue offers several compelling reasons to earn a spot in your landscape:

  • Stunning tubular purple to blue-purple flowers that create eye-catching displays
  • Excellent drought tolerance once established, perfect for water-wise gardening
  • Attracts native bees, hummingbirds, and other important pollinators
  • Low maintenance requirements that fit busy lifestyles
  • Authentic native plant that supports local ecosystems

Important Conservation Note

Before you rush to add this beauty to your cart, there’s something important to know: Crandall’s beardtongue has a Global Conservation Status of S4T3, indicating it has some conservation concerns. This doesn’t mean you can’t grow it, but it does mean you should only purchase plants from reputable native plant nurseries that propagate their stock responsibly rather than wild-collecting. Never collect seeds or plants from wild populations.

Perfect Garden Spots

Crandall’s beardtongue isn’t a plant for every garden situation, but when placed correctly, it truly shines. This mountain native excels in:

  • Rock gardens where its natural alpine character fits perfectly
  • Native plant gardens celebrating regional flora
  • Xeriscapes and drought-tolerant landscapes
  • Alpine-style gardens that mimic high-elevation conditions

Growing Conditions That Make It Happy

Success with Crandall’s beardtongue comes down to understanding its mountain origins. This plant has evolved in harsh, high-elevation environments, so it has some specific preferences:

  • Drainage is everything: Plant in well-draining soil or raised beds to prevent root rot
  • Sun exposure: Full sun to partial shade, though morning sun is particularly appreciated
  • Soil type: Prefers alkaline soils similar to its native mountain habitat
  • Water needs: Drought tolerant once established, but appreciates occasional deep watering during dry spells
  • Climate zones: Hardy in USDA zones 4-8, handling cold mountain winters with ease

Planting and Care Tips

Getting Crandall’s beardtongue established is straightforward when you remember its mountain heritage:

  • Plant in spring after the last frost when soil is workable
  • Amend heavy clay soils with coarse sand or gravel to improve drainage
  • Space plants according to nursery recommendations, typically 12-18 inches apart
  • Water regularly the first season to establish roots, then reduce watering
  • Avoid fertilizing – these mountain natives prefer lean soils
  • Cut back spent flower stems to encourage potential second blooming

The Pollinator Connection

One of the most rewarding aspects of growing Crandall’s beardtongue is watching the parade of visitors it attracts. The tubular flowers are perfectly designed for native bees and hummingbirds, creating a natural feeding station right in your garden. By choosing this native species over non-native alternatives, you’re providing food sources that local wildlife has co-evolved with for millennia.

Is This Plant Right for Your Garden?

Crandall’s beardtongue is an excellent choice if you’re gardening in Colorado or Utah and want to incorporate authentic regional natives into your landscape. It’s particularly well-suited for gardeners who appreciate low-maintenance plants with high ecological value. However, if you’re looking for a plant that thrives in rich, moist soils or humid conditions, this mountain native probably isn’t your best bet.

Remember to source your plants responsibly from reputable native plant nurseries, and you’ll be rewarded with a beautiful, drought-tolerant perennial that connects your garden to the wild landscapes of the Rocky Mountain region.

Crandall’s Beardtongue

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Penstemon Schmidel - beardtongue

Species

Penstemon crandallii A. Nelson - Crandall's beardtongue

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