North America Native Plant

Osterhout’s Beardtongue

Botanical name: Penstemon osterhoutii

USDA symbol: PEOS

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Osterhout’s Beardtongue: A Colorado Native Gem for Your Garden If you’re looking to add a splash of purple beauty to your garden while supporting local wildlife, let me introduce you to one of Colorado’s most charming native wildflowers: Osterhout’s beardtongue (Penstemon osterhoutii). This delightful perennial is like having a little ...

Osterhout’s Beardtongue: A Colorado Native Gem for Your Garden

If you’re looking to add a splash of purple beauty to your garden while supporting local wildlife, let me introduce you to one of Colorado’s most charming native wildflowers: Osterhout’s beardtongue (Penstemon osterhoutii). This delightful perennial is like having a little piece of the Rocky Mountains right in your backyard!

What Makes Osterhout’s Beardtongue Special?

Osterhout’s beardtongue is a true Colorado native, found exclusively in the beautiful mountainous regions of the Centennial State. As a perennial forb (that’s garden-speak for a non-woody flowering plant), it comes back year after year to grace your garden with its presence. Unlike shrubs or trees, this plant keeps its growing points right at or below ground level, making it perfectly adapted to survive Colorado’s sometimes harsh winters.

Where Does It Call Home?

This special beardtongue is what botanists call endemic to Colorado – meaning it’s found nowhere else in the world naturally. Talk about exclusive! You’ll find it thriving in the state’s mountainous terrain, where it has adapted to the unique conditions of high-altitude living.

Why Your Garden (and Local Wildlife) Will Love It

There are plenty of reasons to fall in love with Osterhout’s beardtongue:

  • Stunning tubular flowers in shades of purple to blue-violet that bloom through the growing season
  • A magnet for hummingbirds, native bees, and butterflies
  • Drought-tolerant once established – perfect for water-wise gardening
  • Adds vertical interest and natural beauty to garden beds
  • Supports local ecosystems by providing native habitat

Perfect Garden Companions and Settings

Osterhout’s beardtongue shines brightest in:

  • Native wildflower gardens
  • Rock gardens and alpine-style landscapes
  • Xeriscape (water-wise) gardens
  • Naturalized areas where you want that wild mountain meadow feel

It plays beautifully with other Colorado natives and adds that pop of color that makes visitors stop and ask, What’s that gorgeous purple flower?

Growing Osterhout’s Beardtongue Successfully

The good news is that this native beauty isn’t particularly fussy – after all, it evolved to thrive in Colorado’s challenging mountain environment!

Climate Considerations

Osterhout’s beardtongue is hardy in USDA zones 4-7, making it well-suited for most of Colorado and similar mountain climates. It can handle cold winters like a champ.

Growing Conditions

Give your beardtongue:

  • Well-draining soil (this is crucial – soggy roots are its enemy)
  • Full sun to partial shade
  • Minimal water once established
  • Good air circulation

Planting and Care Tips

Spring is the ideal time to plant Osterhout’s beardtongue. Here’s how to set it up for success:

  • Choose a spot with excellent drainage – amend heavy clay soils with gravel or coarse sand
  • Plant at the same depth it was growing in the container
  • Water regularly the first growing season to help establish roots
  • Once established, water sparingly – this plant actually prefers to stay on the dry side
  • Deadhead spent flowers to encourage more blooms, or leave them for seeds if you want natural spreading

A Plant Worth Celebrating

By choosing Osterhout’s beardtongue for your garden, you’re not just adding beauty – you’re celebrating Colorado’s unique natural heritage and supporting the wildlife that depends on native plants. It’s a win-win that brings a little mountain magic to wherever you plant it!

Whether you’re creating a dedicated native plant garden or just want to add some drought-tolerant color to your landscape, Osterhout’s beardtongue is a fantastic choice that connects your garden to the wild beauty of Colorado’s mountains.

Osterhout’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 osterhoutii Pennell - Osterhout'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