Guide to growing garden plants - Cheiranthus (Wallflower)
Cheiranthus is a hardy perennial but is usually grown as an hardy annual or biannual by gardeners.
Cheiranthus is also known as wallflower or Gillyflower. Cheiranthus members can vary in height from 15 to 80cm in height.
It has blossoms that cover all of its stalks and flowers from the late spring to early autumn.
How to grow Wallflower - Cheiranthus
If planning to grow Cheiranthus outdoors then they should be planted either in early spring or early autumn (if treating as a hardy biennial then they should be planted from the end of summer) at a depth of 7 mm. They should be planted into an area of the garden that is either sunny or partially shaded. Garden Wallflowers like to grow in a neutral or slightly limy soil that has good drainage. When growing wallflowers from seeds indoors they should be prepared about ten weeks before you plant them outdoors in the early spring (middle of summer for biennials). Cheiranthus should be spaced at about 15cm (small) to 30/40cm apart (others).
Caring for wallflowers in the garden
Once established pinching back the tips will encourage the garden wallflower to become more bushy. if you are growing the plant as an hardy annual then plants should be removed once they have finished flowering. If you require more plants then you can take cuttings from wallflowers in late spring.