Forecast Mixed Colors zinnias produce endless blooms and thrive in virtually any conditions. Expect a stunning blend of purple, pink, orange, salmon and yellow petals surrounding sunny yellow centers. Zinnia may be grown from seed sown early indoors and transplanted outside after frost, or sown directly in the garden after frost. Loved by gardens and trusted by gardeners, Burpee© has been introducing fresh garden breakthroughs since 1876. Burpee offers only the highest quality, non-GMO seeds, hand-picked by expert horticulturalists to thrive in your home garden.