A perennial to Zones 4-5, sow seeds in moist fertile ground in spring or divide the roots in spring or autumn. Especially needs extra irrigation if in full sun. Spreads on its own but not invasive. Divisions are easy and can be done in spring or late fall. Fertilize once or twice annually with a balanced fertilizer and extra nitrogen.
Harvest tops when it starts to flower.
Use pruning shears and keep in the shade in thin piles or take to drying area immediately. Yields of over 2,000 pounds of dry material per acre are possible. Dries easily in 3-5 days but needs to be turned often. There are two ideas as to the name of skullcap. One is because the calyx of the little blue flower resembles a tiny cap.