Scarlet bugler

Penstemon barbatus

Family:: Plantaginaceae
Elevation:: 4,000 ft – 9,500 ft
Bloom:: Jun – Sep
Region:: Southwest

Tall wands of tubular scarlet flowers held above a basal rosette, timed to the summer hummingbird migration. One of the easiest and most rewarding native penstemons for the high desert.

Care · tuned to the Southwest

Water

Drought tolerant once established; occasional deep water during bloom extends it. Wet crowns in winter are the main killer — keep it dry and sharply drained.

Sun & exposure

Full sun to very light afternoon shade at lower, hotter sites.

Soil

Lean, gritty, alkaline, fast-draining. Gravel mulch (not bark) keeps the crown dry and helps it reseed.

In the Southwest

Short-lived (3–5 years) but self-sows freely into gravel, so a stand persists. Leave some spent stalks to reseed. A premier hummingbird plant paired with claret cup and desert willow.

Common problems & fixes

Crown rot in wet or clay soil — the most common cause of sudden death
Fix — Plant in sharply drained, lean soil, keep mulch off the crown, and water only occasionally.
Naturally short-lived — declines after a few years
Fix — Leave some seed stalks standing so it self-sows and volunteers replace aging plants.

Pets & toxicity

No known toxicity to pets.

Easy to confuse with

Firecracker penstemon (Penstemon eatonii) — similar red, broader flower
Pineleaf penstemon (P. pinifolius) — needle foliage, shrubbier

Sources

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