84-91 Days to maturity. Papaver rhoeas. Double Mixed Shirley Poppy Seeds. Non-GMO, organic, Annual. Double Mixed Shirley poppy seeds are a classic summertime treasure. Double Mixed seeds promise delicate and papery 2 inch bicolored carmine poppy blooms stemming from 20-30 inch tall frost-tolerant greens. Double Mixed Shirley poppies can be broadcasted directly in the garden just like wildflowers, or grown in planters to show off indoors or up on the patio. Double Mixed Shirley poppies are easy to grow from seed and a perfect, low-maintenance grow for kids or busy or novice gardeners. About 165,000 seeds per ounce.