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Herbaceous PerennialSynonym

Cheiranthus mutabilis

changeable wall-flower

A sub-shrubby perennial, with a woody base, slender, lax stems and narrow, slightly spoon-shaped green leaves. Small flowers in shades of yellow, buff or purple, with fine hairs on the back of the petals, are produced from mid spring to mid summer

Synonyms

Cheiranthus mutabilis

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Ultimate height

0.1–0.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Loam

Sand

Moisture

Well–drained

pH

Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

South–facing or West–facing

Exposure

Sheltered

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

Botanical details

Family: Brassicaceae
Native to the UK: No
Foliage: Deciduous
Habit: Spreading branched
Genus: Erysimum can be annuals, biennials or woody-based perennials with narrow leaves and dense racemes of often fragrant, 4-petalled flowers
Name status: Correct
Plant range: Crete

How to grow

Cultivation

Grow in a sunny position in poor to moderately fertile, well-drained, neutral to alkaline soil. May need protection from hard frosts and excess winter wet

Propagation

Propagate by seed or by softwood cuttings in spring or summer

Suggested planting locations and garden types

Coastal
Gravel garden
Rock garden
Cottage and informal garden
Wildlife gardens

Pruning

No pruning required

Pests

May be susceptible to slugs, snails, cabbage root fly and flea beetles

Diseases

May be susceptible to downy mildews, club root, leaf spot, root rot and virus diseases

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