Though strictly perennials, these favourite plants are invariably treated as biennials, sowing in May. They appreciate some lime in the soil. Good varieties include Cloth of Gold, bright yellow, Eastern Queen, salmon-apricot, Bacchus, wine-red, Harbinger, mahogany-brown, Carmine King, a pleasing carmine and Vulcan velvety-crimson. For the Siberian wallflower see CHEIRANTHUS ALLIONII.

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