Garden Oracle / Drought and Heat Tolerant Gardening / Tucson - Phoenix - Arizona - California

Growing Penstemon superbus:
Coral Penstemon

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Description
Form: Herb.
Lifespan: Perennial.
Leaf retention: Evergreen.
Growth rate: Moderate to rapid.
Mature Size: 4-6' (1.2-1.8m) high with stalk, 1-2' (0.3-0.6m) wide.
Flowers: Dark pink, red, or orange-red, tubular with five flared broad lobes, arrayed on a tall spike.
Bloom: Winter or spring, depending on local climate.
Fruit: Seed capsule.
Leaves: Green to blue-green, long, lance-shaped, opposite, clasping stem.
Stems: Stiff, upright to leaning, purple.
Wildlife: The flowers attract bees and hummingbirds.
Toxic / Danger: No.
Origin: Arizona, New Mexico and Mexico.

Cultivation and Uses
USDA hardiness zones: 6-10. Flowers and flower stalks are susceptible to freezes.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun to light shade. This plant does better with light shade in high temperatures. Avoid heavy shade.
Soil: Well draining, dry, sandy, pH 7.6-8.5 (slightly alkaline to alkaline).
Water once established: Once or twice a month, accommodating for rain. The soil must dry out between waterings.
Mulch: Small gravel.
Prune: Cut off spent flower stalks to extend bloom.
Litter: Low.
Propagation: Seed planted in the fall; seed cold stratified for one month and planted in late winter; cuttings taken from new growth in the spring; half-woody cuttings taken in the summer.
Uses: Ornamental, hummingbird garden.

Comments
This plant is a member of the Penstemon and Plantain family (Plantaginaceae). Another common name is Superb Penstemon.



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Penstemon superbus: Coral Penstemon - flower

Penstemon superbus: Coral Penstemon - flowers

Latest update: September, 2024
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