Double flowers with a silky appearance in shades of pink, white, red, rose, and salmon on 80 cm stems. Strong plants perform well in the heat and drought even though they are considered a cool-season plant. Sow Shirley Double Mix poppy seeds at two-week intervals from late February to mid-April for flowers from mid- to late summer. These poppies will self-sow, and they look spectacular in mass plantings. The flowers have a very delicate appearance, but the plants are actually quite tough. For cut flowers use a candle to sear the stem ends to help them last several days. Rely on Shirley Double to self-sow without becoming weedy.