Growing Iris ensata (Japanese Iris): Acid-Loving Moisture Plant

Culture

Soil: Rich, acid soil. If alkaline, amend with peat moss and periodically dust with soil sulfur.
Moisture: Ample summer moisture; won't tolerate poorly drained winter soil.
Light: Partial shade in South.
Division: Divide after bloom or in fall every 3–4 years to prevent crowding.

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