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How to grow Erysimum

Erysimum (er-is-im-um)

From the Greek erus, to draw up; some species are said to produce blisters (Cruciferae). Alpine wallflower. Hardy annual, biennial and perennial plants, closely related to Cheiranthus. Some are rather weedy, but others make good edging plants for a perennial border, or on gravelly banks and retaining walls.

Annual species cultivated                 E. perofskianum, 1 foot, reddish-orange, summer, Afghanistan.

Biennial E. allionii see Cheiranthus allionii, E. arkansanum, 11-2 feet, golden-yellow, July to October, Arkansas and Texas. E. asperum, 1 foot, vivid orange, early summer, North America. E. linifolium (syn. Cheiranthus linifolius), 1-14 feet, rosy-lilac, early summer, Spain.

Perennial E. dubium (syn. E. ochroleucum), 1 foot, pale yellow, April to July, Europe. E. rupestre, 1 foot, sulphur-yellow spring, Asia Minor.

Cultivation The alpine wallflowers like ordinary soil in dryish, sunny beds or in the rock garden. Propagation of annuals is by seed sown in April where the plants are to flower; biennials by seed sown out of doors, in June in a sunny place, transplanting the seedlings to their flowering positions in August; perennials by seed sown in a similar manner or by division in March or April, or by cuttings inserted in sandy soil in August in a cold propagating frame.

 



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