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A picture of a Cascade penstemon

Cascade penstemon

Penstemon serrulatus

Full Sun
Moderate watering
Frost Hardy

8a

USDA zone

-12°C

Minimum temperature

Expected size

Height
Spread

60cm

Max

30cm

40cm

Min

15cm

Flowering

  • spring
  • summer
  • autumn
  • winter

More images of Cascade penstemon

Serrulate Penstemon, Cascade Beardtongue, Coast Penstemon
A photo of Cascade penstemon

Cascade penstemon Overview

This species is very frost-hardy, it will produce broad, lance-shaped leaves with serrated edges. The flowers bloom in dense clusters they are tubular to bell-shaped, deep blue to purple and open from late summer.

Common problems with Cascade penstemon

How to propagate Cascade penstemon

Division

You can propagate by division in the spring or from seed in the spring or autumn.

Seed

Other uses of Cascade penstemon

Rock garden, cutting bed, border, flower arranging Suitable for coastal conditions.