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A picture of a Wallflower

Wallflower

Erysimum spp.

Also known as

Blister cress

Photo by CandideUK (All rights reserved)

Full Sun
Easy care
Moderate watering
Frost Hardy

H4

RHS hardiness

-10°C

Minimum temperature

Expected size

Height
Spread

75cm

Max

50cm

20cm

Min

20cm

2 years to reach maturity

Flowering

    • spring
    • summer
    • autumn
    • winter

    This plant has a mild fragrance

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    Wallflower Overview

    Also known commonly as Wallflower, the genus Erysimum contains over 260 annual, biennial and semi-evergreen or evergreen perennials and subshrubs. All are typically grown for their attractive fragrant flowers and perennials in this genus are generally short-lived and treated as biennial plants in cultivation. Occasionally listed with the synonym name Cheiranthus many cultivars have been developed with a wide range of colours. Semi-hardwood cuttings can be taken from your favourite coloured plants in spring or summer to continue your display the following spring. However, ready to plant bare-root plug plants are readily available in autumn. Soak the roots for half an hour before planting and space them 30cm (12") apart. They are full to frost hardy and will need sun and well-drained soil. Pinching out the growing tips of young plants - when they reach 12cm (5") in height - will encourage bushy growth and greater flower production. Once flowering has finished, prune these plants back to prevent them from getting too leggy. Water, apply a slow-release fertiliser and mulch to help the plant recover. This can encourage plants to produce a second flush of flowers in autumn.

    Common problems with Wallflower

    How to propagate Wallflower

    Cuttings

    Softwood cuttings in the summer.

    Seed

    Between May and July sow seed directly into prepared seed beds with well-drained soil. Make drills 13mm (0.5") deep and space rows 30cm (12") apart. Water regularly during dry periods. Transplant young plants when they are large enough [autumn] to their final growing positions. Alternatively - sow into containers [seed trays, pots] and keep covered with a temperature between 13-15° (55-65°F). When large enough to handle, prick out seedlings into individual pots and grow on with cooler conditions, before planting out.

    Special features of Wallflower

    Attractive flowers

    Attracts useful insects

    An excellent choice for encouraging pollinating insect wildlife into your garden!

    Ground cover

    Pot plant

    Other uses of Wallflower

    Grown for their flowers. Suitable for borders, banks and rock gardens.

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