How to Grow Wallflower
Erysimum cheiri
Wallflowers are among the earliest perennials to bloom, often flowering from late winter right through spring and into summer. Plant in poor, well-drained soil — they thrive in the lean, alkaline conditions found on old walls and raised beds. Avoid rich soil and heavy feeding, which produce soft growth and shorten the plant's life. Trim lightly after flowering to keep plants bushy. They are short-lived (3–5 years), so take softwood cuttings in summer as insurance. Bowles's Mauve is the classic UK variety, flowering almost year-round in mild areas.
Yearly Lifecycle
Care Essentials
Light feed in spring with a balanced fertilizer. Avoid rich feeding which shortens the plant's lifespan.
Watch For
- Cabbage white butterfly caterpillars
- Flea beetles on young growth
- Club root in brassica family soil
Companions
Tulips, Forget-me-nots, Aubrieta, Lavender
Track your Wallflower care schedule — pruning, feeding, and seasonal tasks
Start planning freeCare Requirements
☀️ Light
Full sun
Wallflowers need full sun for the best flowering — at least six hours of direct sunlight daily. A south or west-facing wall is ideal, providing warmth and shelter.
💧 Watering
Low water needs, excellent drainage essential
Drought-tolerant once established. Water sparingly — wallflowers hate wet feet. On heavy soil, improve drainage with grit or plant in raised beds. Only water during prolonged dry spells.
🌱 Fertilizing
Minimal feeding
Avoid rich feeding which produces soft, short-lived growth. A light application of balanced fertilizer in spring is sufficient. Lean soil produces tougher, longer-lived plants.
✂️ Pruning
Light trim after flowering
Trim lightly after the main flowering flush to keep plants compact and encourage further blooms. Never cut into old bare wood as it rarely regrows. Remove any dead or damaged stems in spring.
🍂 Mulching
Gravel mulch for drainage
A thin layer of gravel or grit around the base helps drainage and prevents crown rot. Avoid heavy organic mulch which retains too much moisture around the stems.
Growing Tips
Take cuttings as insurance
Wallflowers are short-lived, so take softwood cuttings in early summer. They root easily in gritty compost and provide replacement plants when the parent declines.
Lean soil is best
Rich, fertile soil produces lush foliage but fewer flowers and a shorter lifespan. Wallflowers thrive in poor, alkaline, well-drained soil — old walls and rubble are ideal.
Trim after flowering to keep shape
A light trim after the main flowering flush prevents plants becoming leggy and woody. Never cut into old bare wood — it rarely regrows.
Perfect for pollinators
Wallflowers are one of the most valuable early nectar sources for bees and butterflies. Plant near a sunny wall for the earliest blooms.
Pests & Diseases
Pest Cabbage White Caterpillars
Identification: Green or yellow-striped caterpillars feeding on leaves; ragged holes in foliage
- Pick off caterpillars by hand regularly
- Use fine mesh netting to exclude butterflies
- Spray with Bacillus thuringiensis (Bt) — a biological caterpillar control
Pest Flea Beetles
Identification: Tiny shiny beetles that jump when disturbed; numerous small round holes peppered across leaves
- Water regularly to help plants outgrow damage
- Use sticky traps near affected plants
- Spray with a pyrethrin-based insecticide if damage is severe on young plants
Pest Aphids
Identification: Clusters of grey-green waxy aphids on stems and leaf undersides; distorted shoot tips
- Blast off with a strong jet of water
- Encourage ladybirds and lacewings
- Spray with a fatty acid or pyrethrin-based insecticide
Disease Club Root Plasmodiophora brassicae
Symptoms: Swollen, distorted roots; yellowing and wilting foliage; stunted growth
Treatment: No cure; remove and destroy affected plants. Do not compost infected material
Prevention: Lime acidic soils to raise pH above 7.2; rotate brassica-family plants; improve drainage
Disease Downy Mildew
Symptoms: Yellow patches on upper leaf surfaces with white or grey fuzzy growth underneath; leaves may drop
Treatment: Remove affected leaves; improve air circulation
Prevention: Avoid overhead watering; ensure good spacing; remove plant debris
Disease Root Rot
Symptoms: Wilting despite moist soil; yellowing lower leaves; soft, brown roots when inspected
Treatment: Remove and destroy affected plants; improve drainage before replanting
Prevention: Ensure excellent drainage; avoid overwatering; plant in raised beds on heavy soil
Log Wallflower in your garden — track growth, care, and harvests year after year
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