Penstemon spectabilis
showy penstemon
Southern California and northwestern Mexico
Overview
Penstemon spectabilis is a perennial or woody-based subshrub in the plantain family, native to southern California and northern Baja California, growing 2-4 feet (60-120 cm) tall. From a basal cluster it sends up erect stems lined with paired, blue-green, sharply toothed leaves, the upper pairs often fused around the stem. In spring it bears open, branched spikes of tubular flowers about 1-1.5 inches (2.5-4 cm) long, ranging from rose-purple to blue-violet with a paler, often whitish throat. The flowers are shaped for both hummingbirds and large bees, including specialist pollinators. After bloom the plant sets dry seed capsules and the flowering stems die back, while the basal foliage may persist. It grows in chaparral, coastal sage scrub, washes, and burned or disturbed slopes, often flushing after fire. The species tolerates heat, drought, and poor soils but is short-lived, often persisting only a few years before needing replacement from seed. It needs sharp drainage and dislikes summer water once established. It grows in full sun to light shade and is hardy in USDA zones 8 to 10. Plants reseed where conditions suit them.
Native Range
Native to southern California and northern Baja California, growing in chaparral, coastal sage scrub, dry washes, canyons, and disturbed or recently burned slopes below about 4,500 feet (1,400 m).Suggested Uses
Used in native, water-wise, and pollinator gardens, on dry slopes, and in chaparral restorations, spaced 18-24 inches (45-60 cm) apart. Its spring spikes suit hummingbird and bee plantings. Combines with other drought-tolerant perennials and shrubs in low-water borders.How to Identify
Appearance
Size & Dimensions
Height2' - 4'
Width/Spread1' - 2'
Colors
Foliage Colors
Bloom Information
Blooms in spring, mainly April to June, with tall branched spikes of tubular flowers opening from the base upward. Flowering lasts several weeks and is heaviest in years after fire or good winter rain. The stems die back after seed sets.
Detailed Descriptions
Flower Description
rose-purple to blue-violetFoliage Description
blue-greenGrowing Conditions
Sun Requirements
Requires 6-10 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight
Care & Maintenance
Care Guide
Grow in full sun to light shade in fast-draining sandy, gravelly, or rocky soil; sharp drainage is essential. Water established plants sparingly, as summer irrigation and heavy soils cause root rot and shorten the plant lifespan. It tolerates heat, drought, and poor ground once rooted. The species is short-lived, so allowing some seed to drop or sowing fresh seed maintains a planting. Cutting back spent flower stems can prompt a lighter second bloom. No serious pests trouble it, though crown rot occurs in wet soils.Pruning
Cut flowering stems back to basal growth after bloom to tidy the plant and sometimes encourage rebloom. Remove dead stems in late winter. Heavy summer watering harms the plant more than any pruning.Pruning Schedule
J
F
M
A
M
J
J
A
S
O
N
D
summer
Container Growing
✓ Suitable for container growing
Minimum container size: 3 gallons