×
To buy, sell or swap plants and use our full service please log in or sign up – GreenPlantSwap is completely free!
Record your plants before you lose the plant labels! Just tick the ‘Garden’ box (below) on each plant. Learn more

Penstemon serrulatus

Cascade penstemon

Garden

Wishlist

  • Penstemon serrulatus | Copyright Greenplantswap 2019

Features

  • BloomsAugust to October
  • Height0.4m to 0.6m
  • Spread0.15m to 0.3m
  • Growth HabitStalked clump
  • Flower ColourDeep blue-purple
  • Leaf ColourMedium green

Description

Penstemon serrulatus (Cascade penstemon). 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.

Characteristics

Perennial, Evergreen, Sub-shrub

Origin

Alaska

Interest and use

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

Search or browse our Glossary of 3,000+ botanical and plant-related terms


Have something to say about this plant?
Click to write a post, ask a question or share a tip.


  • Penstemon serrulatus | Copyright Greenplantswap 2019

Needs

  • LightFull sun
  • HardinessFully hardy (min -15°C)
  • SoilWell drained, Fertile
  • Soil pH5.5 to 7.0
  • WaterSemi-moist

Cultivation

They will thrive in fertile, well-drained soil with full sun.

Propagation

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

Pests, diseases or disorders

May be damaged by slugs and snails and powdery mildew.

Search or browse our Glossary of 3,000+ botanical and plant-related terms


Have something to say about this plant?
Click to write a post, ask a question or share a tip.


Have something to say about this plant?
Click to write a post, ask a question or share a tip.


Other Penstemon posts

To view Penstemon plants offered near you, enter your postcode or log in.

Get started & find out why

Posts of the WeekPosts & Events

Open your garden for Thrive
Digging

“It’s not just gardening,
it makes us healthier and happier”

Production v5.9.2 (00577d2)