North America Native Plant

Navajo Mountain Beardtongue

Botanical name: Penstemon navajoa

USDA symbol: PENA4

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Navajo Mountain Beardtongue: A Rare Gem for Conservation-Minded Gardeners Meet one of Utah’s most precious botanical treasures: the Navajo Mountain beardtongue (Penstemon navajoa). This little-known perennial is a true rarity in the gardening world, and for good reason – it’s one of the most endangered plants you can grow in ...

Rare plant alert!

Region: Conservation status by state

Status: S1: Status is uncertain but is somewhere between the following rankings: Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘

Navajo Mountain Beardtongue: A Rare Gem for Conservation-Minded Gardeners

Meet one of Utah’s most precious botanical treasures: the Navajo Mountain beardtongue (Penstemon navajoa). This little-known perennial is a true rarity in the gardening world, and for good reason – it’s one of the most endangered plants you can grow in your garden.

A Plant on the Edge

Before we dive into growing tips, let’s talk about something crucial: this plant is critically imperiled. With a Global Conservation Status of S1, Penstemon navajoa typically has only 5 or fewer known populations and fewer than 1,000 remaining individuals in the wild. That makes it rarer than many animals you’d find in a zoo!

Important: If you’re considering adding this plant to your garden, please only source it from reputable native plant nurseries that propagate from ethically collected seeds or cuttings. Never collect from wild populations.

Where Does It Call Home?

This endemic beauty is found exclusively in Utah, specifically around the Navajo Mountain area in the southeastern part of the state. As a native plant of the lower 48 states, it’s perfectly adapted to the unique conditions of its high desert homeland.

What Makes It Special?

Like other members of the beardtongue family, Navajo Mountain beardtongue is a herbaceous perennial that produces lovely tubular flowers. These blooms, typically in shades of purple to pink, appear in late spring to early summer and are magnets for pollinators. The plant grows as a forb, meaning it’s a non-woody plant that dies back to the ground each winter and re-emerges in spring.

Why Grow This Rare Beauty?

You might be wondering: why would I want to grow such a rare plant? Here are some compelling reasons:

  • Conservation Impact: By growing this species responsibly, you’re contributing to its preservation
  • Pollinator Paradise: Native bees, hummingbirds, and butterflies love Penstemon flowers
  • Low Maintenance: Once established, it’s drought-tolerant and requires minimal care
  • Unique Garden Feature: Few gardeners can claim they’re growing one of Utah’s rarest plants!
  • Native Plant Gardening: Perfect for authentic Utah native plant landscapes

Growing Conditions and Care

If you’re lucky enough to source this rare gem, here’s how to keep it happy:

Sunlight: Full sun is essential – this plant loves basking in bright light just like it does in its native habitat.

Soil: Well-draining sandy or rocky soil is crucial. Think desert conditions – soggy soil is this plant’s enemy.

Water: Drought-tolerant once established, but avoid overwatering at all costs. Less is definitely more with this species.

Climate: Hardy in USDA zones 4-8, making it suitable for most temperate gardens with proper drainage.

Perfect Garden Companions

Navajo Mountain beardtongue shines in:

  • Rock gardens with excellent drainage
  • Native plant gardens focused on Utah species
  • Xeriscaping projects
  • Conservation gardens
  • Pollinator gardens with native focus

The Bottom Line

Growing Penstemon navajoa is more than just adding another plant to your garden – it’s participating in conservation. This critically imperiled species deserves our protection and responsible cultivation. If you can source it ethically and provide the well-draining, sunny conditions it craves, you’ll be rewarded with a unique piece of Utah’s natural heritage right in your backyard.

Just remember: with great rarity comes great responsibility. Always source responsibly, never collect from the wild, and consider this plant a living treasure that you’re helping to preserve for future generations.

Navajo Mountain 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 navajoa N.H. Holmgren - Navajo Mountain beardtongue

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