perennialN. America Native

Garnet Penstemon

Penstemon glaber 'Garnet'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

30 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

7, 8, 9

Water

Low to moderate

Humidity

Average

Lifespan

Short-lived perennial

Native To

Garden hybrid of North American species

Toxicity

Non-toxic to humans and pets

The Story

Plant Bio

A popular and long-blooming hybrid Penstemon with sturdy, upright stems and showy tubular flowers. Valued for its drought tolerance and attractiveness to hummingbirds. This cultivar, also known as 'Andenken an Friedrich Hahn', is known for its deep wine-red or garnet-colored flowers that bloom profusely from summer to fall. It is more tolerant of regular garden conditions than many western species.

Uses & Benefits:

Penstemon garnet provides vibrant red flowers that attract hummingbirds and add striking color to gardens.

Its drought tolerance makes it ideal for water-wise gardening and low-maintenance landscapes.

Supports pollinators like bees and hummingbirds, enhancing local biodiversity.

Marketplace

Where to Buy

We couldn't find this plant listed online right now.

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Planting

How to Grow

Select a sunny location with well-draining soil for planting.
Tuck seeds just below soil surface and water gently to settle.
Maintain consistent moisture during germination, which takes 2-3 weeks.
Transplant seedlings when they are sturdy and spaced 12 inches apart.
Apply a light mulch around plants to conserve moisture and suppress weeds.
Fertilize with a balanced, low-nitrogen fertilizer in early spring.

Pro Tip

Sow seeds outdoors in early spring for best germination and flowering.

Keep It Thriving

Care Guide

Do

Water regularly during dry spells to keep soil moist but not waterlogged 🌱
Prune lightly after flowering to encourage bushier growth
Apply a balanced fertilizer in spring to promote healthy blooms

Don't

Avoid overwatering, which can lead to root rot ❌
Don’t fertilize with high-nitrogen fertilizers that promote foliage over flowers
Refrain from heavy pruning during late fall to prevent damage

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Divide
Fertilize
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Xeriscape garden with drought-tolerant plantsColorful border with vibrant red flowersRock garden accent with textured foliage

Companion Plants

Sedum Lavender Echinacea Salvia Gaillardia

Multiply

Propagation Methods

Good to Know

Common Questions

Garnet Penstemon questions

What zones can Garnet Penstemon grow in?

Garnet Penstemon is hardy in USDA Zones 7–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Garnet Penstemon deer resistant?

Yes — Garnet Penstemon is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Garnet Penstemon bloom?

Garnet Penstemon typically blooms in summer to fall through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Garnet Penstemon need full sun?

Garnet Penstemon does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Garnet Penstemon drought tolerant?

Yes — once established (usually after the first full season), Garnet Penstemon handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.