The Story
Plant Bio
Penstemon centranthifolius, commonly known as scarlet bugler, is an erect perennial herb native to the dry slopes and chaparral of California and Baja California. The plant forms a basal rosette of thick, glaucous, gray-green leaves from which multiple upright, subwoody stems emerge.
This species is distinguished by its hairless, blue-green foliage that clasps the stems and its long, narrow spikes of bright scarlet, tubular flowers. The nearly radially symmetrical blossoms are specifically adapted to pollination by hummingbirds, which easily access the nectar-rich tubes.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Perennial
Height
48"
Width
24"
Light
Full Sun
Zones
8, 9, 10
Water
Low
Humidity
Low
Lifespan
Perennial
Native To
North America (California, Baja California)
Toxicity
Non-toxic
Bloom period
Spring – Summer
In flower about 6 months of the year
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Select a planting site in full sun with sandy, gravelly, or exceptionally well-draining loam.
- Dig a hole twice as wide as the root ball but no deeper, ensuring the crown sits slightly above the surrounding soil grade.
- Water moderately during the first winter and spring to establish the root system, then taper off completely.
- Prune spent flower spikes back to the basal rosette in late summer to maintain a tidy form.
Pro Tip
Provide exceptionally sharp drainage and strictly avoid summer irrigation once established; excess moisture in warm soil triggers fatal root rot.
Keep It Thriving
Care Guide
Do
- Plant in exceptionally well-draining sandy or gravelly soil.
- Provide full sun exposure.
- Allow the soil to dry out completely between waterings once established.
Don't
- Do not apply heavy fertilizers or rich organic compost.
- Do not water during the hot summer months.
- Do not cut back into old, leafless woody stems.
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pest Check | ||||||||||||
| Plant | ||||||||||||
| Propagate | ||||||||||||
| Prune |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Multiply
Propagation Methods
Good to Know
Common Questions
Scarlet Bugler questions
What zones can Scarlet Bugler grow in?
Scarlet Bugler is hardy in USDA Zones 8–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Scarlet Bugler deer resistant?
Not reliably. Deer may browse Scarlet Bugler, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Scarlet Bugler bloom?
Scarlet Bugler typically blooms in spring through summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Scarlet Bugler need full sun?
Scarlet Bugler does best in full sun (6+ hours).
Is Scarlet Bugler drought tolerant?
Yes — once established (usually after the first full season), Scarlet Bugler handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Penstemon to compare
Beardtongue Rondo
Penstemon barbatus 'Rondo'
George Home Penstemon
Penstemon digitalis 'George Home'
Foxglove Beardtongue
Penstemon digitalis
Blue Springs Penstemon
Penstemon heterophyllus 'Blue Springs'
Blackbeard Beardtongue
Penstemon digitalis 'Blackbeard'
Dark Towers Penstemon
Penstemon digitalis 'Dark Towers'
Keep exploring
Explore the genus
Hardy in your zone?
Grow Scarlet Bugler with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.