Sowing: Direct sow in late fall, planting just below the surface of the soil. For spring planting, mix the seeds with moist sand and store in the refrigerator for 60 days before planting. Keep the soil lightly moist until germination.
Growing: As the plants grow, keep the soil consistently moist; this plant loves moisture, and it can tolerate wet soil much better than drought. This plant will spread by rhizomes, and can become weedy in good growing conditions. It also attracts bees and butterflies.
Seed Saving: As the flower spike fades, small pods will form that eventually open and release their seeds. As soon as the pods open, shake them over a container to remove the seed; watch them carefully to prevent loss, since the seeds can easily be blown away by the wind. Store the seed in a cool, dry place.
This occurs naturally on our property in Franklin Co. MO. Great pollinator plant for native bees, moths and some butterflies. It is growing in a ditch in full sun, and has a long bloom period (several months). Put this plant where you don't mind it spreading, as it self sows easily.