Water sparingly, especially in summer dormancy. Allow soil to dry out between waterings. Overwatering is a common cause of root rot. Ensure excellent drainage to prevent waterlogging.

Reduce watering significantly in cooler months and during its resting period.

After flowering, deadhead spent blooms to prevent seed formation and conserve energy. Remove any dead or damaged foliage throughout the growing season.

In late autumn or early winter, trim back any remaining foliage to about 10-15 cm to prevent disease and improve air circulation.

Iris atrofusca is typically propagated by division of rhizomes. After flowering and when the plant is dormant, carefully dig up the rhizomes. Divide them into sections, ensuring each piece has at least one growing eye.

Replant immediately in well-draining soil.

Repotting is generally only necessary when plants become overcrowded, typically every 3-5 years. Do this after flowering during the plant's dormant phase.

Ensure the new pot has ample drainage and use a gritty, well-draining potting mix. Avoid planting rhizomes too deep.