Firecracker Penstemon plant profile
Penstemon eatonii
A perennial flower for full sun.
Last updated .
When to plant
When to plant Firecracker Penstemon
A western perennial for full sun to part shade that demands excellent drainage and low fertility; do not over-water or over-fertilize. Sow seed outdoors in fall (it needs a long cold-moist stratification) or start it indoors after chilling, and divide mature plants in spring or fall.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Firecracker Penstemon in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Full sun
- Soil pH
- 7 to 8
- Lifecycle
- Perennial
- Hardiness
- Zones 3 to 7Find my hardiness zone
Next steps
Continue with Firecracker Penstemon
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Firecracker Penstemon in the Landscape (Penstemon eatonii)
Utah State University Extension. Supports general reference. Checked 2026-06-18.