Best grown in acidic, humusy, organically rich, moisture-retentive but well-drained soils in part shade to full shade. Prefers a sun dappled part shade. Foliage may scorch in full sun. Acidify soils prior to planting and thereafter as needed. Plant in a location protected from strong winter winds. Good soil drainage is essential (doesn’t like wet feet). Poor drainage inevitably leads to root rot, therefore raised beds/plantings should be considered in heavy clay soils. Shallow, fibrous root systems (do not cultivate around plants) will benefit greatly from a mulch (e.g., wood chips, bark or pine needles) to help retain moisture and stabilize soil temperatures. Roots must never be allowed to dry out. Clip off spent flower clusters immediately after bloom as practicable.