 | |  |  | | Erysimum cheiri |  |  |  | | Wallflower |  |  |  | | Biennial |  |  |  | | Frost-hardy |  |  |  | | White, yellow, red, orange and purple |  |  |  | | Mid-to deep green |  |  |  | | 25cm to 30cm x 30cm to 40cm (10in to 1ft x 1ft to 15in) |  |  |  |  Actually an evergreen, bushy, perennial, wallflowers are grown as a biennial. The upright stems have short, lance-shaped leaves and heads of sweetly fragrant, velvety flowers. |
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