Start indoors 6 weeks before last frost, plant out or direct seed after frost. Sow seeds in groups of 4 per plant. Tender annual that does not tolerate frost. If growing for seed, grown in greenhouse in Zone 7B or cooler to avoid early frost. Optimum growing temperatures 60–70˚F. Keep moist until germination. Each plant can carry tens of thousands of flower seeds and it will self-seed very easily. Seeds require light to germinate, press into soil, do not cover. Soil pH 6.1–6.5. Hardiness zones 2-10. Annual.
70%. Usual seed life: 5-10 years. Isolation distance for seed saving: 2 miles.
Planting Depth surface
Soil Temp. Germ. 65-80˚F
Days to Germ. 10–21
Plant Spacing 6-12”
Row Spacing 24-30”
Days To Maturity 100-110Full Sun
, Moist Well Drained