Coral Penstemon
Penstemon superbus
Tall spikes of bright coral flowers rise from the Chihuahuan Desert floor, beckoning every hummingbird in the neighborhood.
Hardy in USDA zones 8-11; a Chihuahuan Desert native evergreen in low-desert winters and adapted to hot low- and mid-desert conditions.
AMWUA Notes
A tall, low-water penstemon that reseeds into dramatic colonies and feeds hummingbirds on minimal irrigation.
Care Guide
Water every 2-3 weeks in the cool season to build strong rosettes, then keep dry in summer; sharp drainage is essential to avoid rot.
Cut the tall spent spikes to the base after bloom; leave a few for the abundant seed that renews this short-lived species.
None required on native soils.
Largely pest-free; loss usually stems from overwatering or heavy, wet soil.
Evergreen rosette through winter that throws 2-3 foot coral spikes in late spring, then rests in summer; reseeds aggressively.
Soil, Feeding & Propagation
Lean, gravelly, fast-draining desert soils; thrives in rocky and decomposed-granite ground; needs sharp drainage.
Needs sharp, fast-draining soil.
None — thrives in lean desert soil without fertilizer.
Seed; reseeds aggressively into colonies. Not divided; move only as small seedlings.
3 ft
Short-lived but self-renewing by abundant seed; volunteers can crowd, so thin as needed.
Placement Tips
- •Use at the back of borders or in a meadow where its tall spikes rise above lower plants.
- •Plant in generous drifts and allow reseeding for a self-renewing colony.
- •Give it full sun, gravel mulch, and dry summer soil.
- •Site where hummingbirds can be enjoyed — its coral tubes are a magnet.
Features
Best Uses
Ecological Value
Attracts
Wildlife Value
Companion Plants
Quick Stats
Design Styles
Include in Your Project
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Use this care guide to maintain your Coral Penstemon. Questions about your landscape? Reach out anytime.
Data from 2024 AMWUA “Landscape Plants for the Arizona Desert” guide.
Coral Penstemon — common questions
Answers for low-desert Phoenix conditions, drawn from this plant’s growing data.
How much water does Coral Penstemon need in Phoenix?
Coral Penstemon is a low-water perennial once established. Water every 2-3 weeks in the cool season to build strong rosettes, then keep dry in summer; sharp drainage is essential to avoid rot. A tall, low-water penstemon that reseeds into dramatic colonies and feeds hummingbirds on minimal irrigation.
How big does Coral Penstemon get?
Expect roughly 2 ft tall and 3 ft wide at maturity, with a moderate growth rate. Allow about 3 ft of spacing when planting. Short-lived but self-renewing by abundant seed; volunteers can crowd, so thin as needed.
Can you plant Coral Penstemon near a pool?
Yes. Coral Penstemon is considered pool-friendly, meaning it stays clean enough around water features and hardscape. Litter is rated low.
Can Coral Penstemon handle Arizona heat and winter frost?
Coral Penstemon is hardy in USDA 9-11 and wants full sun. Hardy in USDA zones 8-11; a Chihuahuan Desert native evergreen in low-desert winters and adapted to hot low- and mid-desert conditions. Evergreen rosette through winter that throws 2-3 foot coral spikes in late spring, then rests in summer; reseeds aggressively.
Does Coral Penstemon have thorns?
No. Coral Penstemon is thornless, so it is safe alongside walkways, patios and play areas.
Is Coral Penstemon safe around pets?
Coral Penstemon is listed as pet-friendly in this guide. If your dog is a determined chewer, check any new plant with your vet before planting.
When does Coral Penstemon bloom in Arizona?
Coral Penstemon blooms in late spring, with bright coral flowers. The bloom draws bees, butterflies, hummingbirds.
How much maintenance does Coral Penstemon need?
Coral Penstemon is low-maintenance. Leaf, flower and pod litter is rated low. Cut the tall spent spikes to the base after bloom; leave a few for the abundant seed that renews this short-lived species.
What kind of soil does Coral Penstemon need?
Lean, gravelly, fast-draining desert soils; thrives in rocky and decomposed-granite ground; needs sharp drainage. It needs no supplemental feeding. None required on native soils.
Is Coral Penstemon native to Arizona?
Yes. Coral Penstemon is native to Arizona and to the Chihuahuan Desert, so it is adapted to local rainfall, soil and heat.