A delicate-looking plant that can reach two feet in height. Has round to finely cut stem leaves and broader leaves near the ground. In midsummer, the thin stems are topped with umbrella-shaped clusters of white flowers, which are heavy enough to make the stems flop. The seed matures late in the growing season.
Space plants about six inches apart so they can lean on each other.
At first bloom, apply a balanced organic fertilizer. Start seed in a peat pot in a warm place indoors in late winter or early spring. Transplant seedlings outdoors when the weather gets mild in late spring. If your plants produce ripe seed, cut off the seed heads and hang them over newspaper in a warm, airy location. Remove the remaining seeds and freeze them all for 48 hours to kill any pests or pest eggs.