Annual: This majestic cactus zinnia produces multi-coloured flowers, measuring up to 15 cm (6″) across. Expect large quantities of flowers on numerous side branches all season long. Sowing: Sow seeds outdoors in a sunny site with well drained organic soil in late May when soil is warm. Barely cover seeds with soil for 5-10 day germination period. When seedlings are 8 cm *3″) tall, thin smaller varieties to 25 cm (10″) apart. Comments: Stiff, formal zinnias are excellent for cut flowers. Approx. 100 sds/pkt.