Sowing: Direct sow the seed in late summer or early fall; the seed will remain dormant until spring. If not planted in the fall, these seeds will need to be stratified to break their dormancy.
- Mix the seed with an equal amount of sand and store it in the refrigerator for 4-6 weeks.
- Start the seeds indoors in a flat, just below the surface. Keep the soil evenly moist and at a temperature of 70 F (21°C) until sprouting. As soon as the seedlings can be safely handled and there is no chance of frost, transplant them.
Growing: Since this plant naturally grows in marshy ground, the plants will need to be watered well to keep the soil moist. It prefers moist to wet soil and full sun, though it also adapts to well-drained soil. This plant attracts hummingbirds, bees, and butterflies.