Papaver Rhoeas This variety produces delicate 2" double blooms in salmon, rose, pink, and red. A great addition to any garden. Growing Instructions Plant in full sun. You can sow these seeds directly onto soil, and mix in gently. Plant them early in the season, they will germinate when the soil reaches about 70 degrees. Space plants 6 - 12 inches apart. It will be 75 to 85 days until pods reach full maturity. Hardiest in zones 5a-7a.