Sea holly are exceptionally tolerant and low-care plants with great disease resistance. As long as you choose a location to their liking, you're destined for success. Your blue sea holly will arrive as a bare root plant and should be planted in the spring, in a sunny spot with normal or sandy soil. Dig a hole large enough to accommodate the roots of your sea holly without bending them. Plant so that the crown, where the stems meet the roots, is just an inch or two below the soil. Mix a bit of bone meal or sand with the soil if you're concerned about drainage. Then, backfill firmly over the sea holly plant--you won't want these tall and spiny perennials to tip over--and water in well. After planting, blue sea holly are extremely easy to care for. They don't require pruning, but you may wish to deadhead the plants after their flowers are spent. Fertilization is not typically required; we actually advise against fertilizing, as too rich of soil can cause them to droop or be leggy. Water your blue sea holly regularly for the first year of its life, but don't worry about an established plant except in the case of true drought. Sea holly doesn't mind dry conditions!