Sow seeds indoors 3/15-4/15. Seeds need light to germinate - sow them on top of the soil and cover with a dome and place in indirect light. Keep at 65-70°F. Water using a mist sprayer or using bottom watering method. Be sure to air out the dome for 15 min each day to prevent fungal growth. Days to seed germination: 14-28 days. Transplant outside after mid May. Space plants 18" apart. Alternatively, you can sow seeds outside late May to early June. Sow 3-4 seeds every 18" and thin plants to the strongest seedling.
Clip flowers for dye when they are open. Continue to cut flowers which will make the plants produce more flowers. Use fresh or dry.