North America Native Plant

Grinnell’s Beardtongue

Botanical name: Penstemon grinnellii

USDA symbol: PEGR8

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Grinnell’s Beardtongue: A Rare California Native Worth Growing Responsibly Meet Grinnell’s beardtongue (Penstemon grinnellii), a charming California native that deserves a spot in your garden – but with an important caveat. This delightful perennial herb is more than just another pretty face in the Penstemon family; it’s a rare treasure ...

Rare plant alert!

Region: Conservation status by state

Status: S3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ 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 ⚘

Grinnell’s Beardtongue: A Rare California Native Worth Growing Responsibly

Meet Grinnell’s beardtongue (Penstemon grinnellii), a charming California native that deserves a spot in your garden – but with an important caveat. This delightful perennial herb is more than just another pretty face in the Penstemon family; it’s a rare treasure that requires our careful attention and responsible growing practices.

A True California Original

Grinnell’s beardtongue is as Californian as it gets, being endemic to the Golden State and found primarily in the Sierra Nevada mountains. This native status makes it perfectly adapted to California’s unique climate and growing conditions, which is fantastic news for local gardeners looking to create sustainable, water-wise landscapes.

Why You Should (Responsibly) Consider Growing It

Important Note: Grinnell’s beardtongue has a Global Conservation Status of S3?, indicating it’s a rare species with an undefined conservation status. If you choose to grow this plant, please ensure you source it responsibly from reputable native plant nurseries that propagate rather than wild-collect their stock.

Despite its rarity – or perhaps because of it – this plant offers several compelling reasons to include it in your garden:

  • Stunning purple to violet tubular flowers arranged in eye-catching terminal spikes
  • Excellent pollinator magnet, attracting hummingbirds, native bees, and butterflies
  • Drought-tolerant once established, perfect for water-wise gardening
  • Supports local ecosystems by providing habitat for native wildlife
  • Low-maintenance perennial that returns year after year

Garden Design and Landscape Role

Grinnell’s beardtongue shines in several garden settings. Its compact, herbaceous growth habit makes it ideal for rock gardens where its natural mountain origins feel right at home. The plant also works beautifully in native California gardens, drought-tolerant landscapes, and wildlife gardens where its pollinator appeal takes center stage.

The narrow, lance-shaped leaves and colorful flower spikes provide excellent texture contrast when planted alongside other native California species like salvias, California poppies, or native grasses.

Growing Conditions and Care

True to its California heritage, Grinnell’s beardtongue thrives in conditions that mirror its natural habitat:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soil is essential – this plant doesn’t appreciate wet feet
  • Water: Drought-tolerant once established, but benefits from regular watering the first year
  • Climate: Hardy in USDA zones 7-9

Planting and Care Tips

Getting started with Grinnell’s beardtongue is relatively straightforward, though patience during establishment pays off:

  • Plant in spring when soil temperatures warm up
  • Ensure excellent drainage – amend heavy clay soils with compost or plant in raised beds
  • Water regularly during the first growing season to establish deep roots
  • Once established, reduce watering frequency significantly
  • Deadhead spent flowers to encourage continued blooming throughout the season
  • Mulch around plants to retain moisture and suppress weeds

A Pollinator Paradise

One of the most rewarding aspects of growing Grinnell’s beardtongue is watching the parade of pollinators it attracts. The tubular flowers are particularly beloved by hummingbirds, whose long beaks are perfectly designed to reach the nectar within. Native bees and butterflies also frequent the blooms, making your garden a bustling hub of beneficial activity.

The Bottom Line

Grinnell’s beardtongue offers California gardeners a chance to grow a truly special native plant that supports local ecosystems while providing beautiful, low-maintenance color. However, its rare status means we must approach cultivation responsibly. When sourced ethically from reputable nurseries, this charming perennial can be a wonderful addition to drought-tolerant gardens, bringing both beauty and ecological value to your landscape.

Remember: by choosing to grow rare native plants like Grinnell’s beardtongue responsibly, you’re not just creating a beautiful garden – you’re participating in conservation efforts that help preserve California’s unique botanical heritage for future generations.

Grinnell’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 grinnellii Eastw. - Grinnell'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