Overview
Erysimum capitatum is a bushy perennial in the genus Erysimum, part of the Brassicaceae family, with evergreen foliage. It typically grows around 0.6 m tall. Erysimum capitatum grows best in full sun, and tolerates most soils and neutral and alkaline pH. Its UK hardiness is rated H5. Suggested uses include coastal, cottage and informal garden, gravel garden, wildlife gardens, garden edging and flower borders and beds. It is native to Alaska, Arizona, Arkansas, California, Colorado, Idaho, Illinois, Indiana, Iowa, Mexico Central, Mexico Gulf and Mexico Northeast.
About
Erysimum capitatum is a species of wallflower known commonly as the sanddune wallflower, western wallflower, or prairie rocket.
Wikipedia contributors, CC BY-SA 4.0 — Erysimum capitatum
About the genus
Erysimum, or wallflower, is a genus of flowering plants in the cabbage family, Brassicaceae. It includes more than 150 species, both popular garden plants and many wild forms. Erysimum is characterised by star-shaped trichomes growing from the stem, with yellow, red, pink or orange flowers and multiseeded seed pods.
Wikipedia contributors, "Erysimum", CC BY-SA 4.0 — Erysimum
Growing conditions
Best soil and position for Erysimum
- Sunlight
- Full sun
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Neutral, Alkaline
- Soil moisture
- Well-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H5
Plant details
Erysimum capitatum size, habit and characteristics
- Plant type
- perennial
- Habit
- Bushy
- Foliage
- Evergreen
- Height
- 0.6 m
- Suggested uses
- Coastal, Cottage and informal garden, Gravel garden, Wildlife gardens, Garden edging, Flower borders and beds
- Native to
- Alaska, Arizona, Arkansas, California, Colorado, Idaho, Illinois, Indiana, Iowa, Mexico Central, Mexico Gulf, Mexico Northeast
- Fragrance
- fragrant
Care notes
Pruning and caring for Erysimum capitatum
- Propagation
- Softwood cuttings in spring or summer
- Pest resistance
- Slugs, Snails, Cabbage root fly, Flea beetles
- Disease resistance
- Downy mildews, Club root, Leaf spot, Root rot, Virus diseases
Frequently asked questions
Where is the best place to plant Erysimum capitatum?
Erysimum capitatum prefers full sun. It suits exposed and sheltered positions.
What soil does Erysimum capitatum need?
Erysimum capitatum is adaptable and grows happily in most soil types, including chalk, loam and sand. It prefers neutral and alkaline soil. Aim for soil that stays well-drained.
How big does Erysimum capitatum grow?
Erysimum capitatum reaches a height of 0.6 m.
Is Erysimum capitatum hardy in the UK?
Erysimum capitatum has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.
How do I propagate Erysimum capitatum?
Softwood cuttings in spring or summer.
