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Erysimum alpinum - Wallflower

Erysimum alpinum
Siberian Wallflower

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A small plant with evergreen dark green foliage, which produces small pendulous, very fragrant, yellow-orange flowers, for weeks, from spring to the middle of summer. With a bushy and compact habit, this perennial wallflower is ideal in rockeries, gravel beds, on walls. It is also an excellent variety for decorating sunny patios and balconies. Hardy, it is easily cultivated in the sun and in well-drained soil, even poor and chalky soil.
Flower size
1 cm
Height at maturity
20 cm
Spread at maturity
35 cm
Exposure
Sun
Hardiness
Hardy down to -23°C
Soil moisture
Dry soil, Moist soil
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Best planting time March to April
Recommended planting time February to April, August to October
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Flowering time May to July, November
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Description

Erysimum alpinum, also known as the Alpine Wallflower, is a small plant with dark green evergreen foliage that produces small, highly fragrant, yellow-orange flowers for weeks from spring to midsummer. Ideal for rock gardens, gravel beds, and walls, it is also an excellent choice for decorating sunny patios and balconies. Very hardy, it can be easily grown without difficulty in sunny, well-drained soil, even poor and chalky soil.

Erysimum alpinum is a species related to wallflowers. All these plants belong to the Brassicaceae or Cruciferous family. Erysimum alpinum is a hardy perennial, but its lifespan is limited: it is often considered a biennial that flowers in the second year before disappearing. It is distinguished by its compact, bushy habit, not exceeding 30 cm (12in) in height and spreading 20 to 30 cm (8 to 12in) wide, as well as by its long flowering period from May to July.
The particularly generous flowering consists of clusters of small yellow-orange flowers. The flowers are small (1.5 cm (1in)) but gathered in clusters which open successively. Sometimes, there is a small summer rebloom if the plant is pruned. Its dark green foliage, evergreen in winter, consists of very fine sword-shaped leaves. It is also decorative due to the contrast it creates with the flowering. This plant, which requires well-drained soil, will survive our normal winters, but its foliage may be slightly damaged by very severe frost.

Erysimum alpinum is a perfect plant for all sunny, slightly dry and rocky areas of the garden, but also on the patio or in a planter placed against a sun-drenched wall. It can be combined with small alpine Phlox, Erodiums, and other low-growing perennial plants such as creeping Gypsophilas, Cerastiums, Diascias, Stachys, Nepetas, Lobelias, or even with evergreen shrubby salvias.

Erysimum alpinum - Wallflower in pictures

Erysimum alpinum - Wallflower (Foliage) Foliage

Flowering

Flower colour yellow
Flowering time May to July, November
Inflorescence Cluster
Flower size 1 cm
Fragrance slightly scented
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen
Foliage colour dark green

Plant habit

Height at maturity 20 cm
Spread at maturity 35 cm
Growth rate fast

Botanical data

Genus

Erysimum

Species

alpinum

Family

Brassicaceae

Other common names

Siberian Wallflower

Origin

Alps

Product reference182131

Planting and care

Plant Erysimum alpinum in a very sunny position in slightly acidic, neutral to limestone, even stony and rocky, well-drained soil. In summer, make sure the soil doesn't dry out too much. Prune the stems after flowering. Erysimum is hardy in well-drained soil, but the evergreen foliage weakens the plant in winter. This plant is very easy to cultivate in a pot, in good horticultural soil, with regular watering and fertilizer for flowering plants.

16
14,50 € Each
6
19,50 €

Planting period

Best planting time March to April
Recommended planting time February to April, August to October

Intended location

Suitable for Meadow, Rockery
Type of use Edge of border, Container, Slope
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, Well-drained

Care

Pruning instructions Cut the flower stalks as they grow.
Pruning Pruning recommended once a year
Pruning time May to August
Disease resistance Very good
Overwinter Can be left in the ground

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