Sorry, Hazel, I should have given you their proper name. Erysimum syn. Cheiranthus. According to my Botanica of garden plants, Wallflowers grow in zones 3 to 10, but sadly Canada is zone 2. I mainly planted them to help shade the roots of my young roses from the hot Summer sun, but I am really pleased with the display of flowers. With my older roses I just plants annuals, with poppies being a particular favorite.
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