Keep the soil consistently moist, especially during dry periods. Water deeply when the top inch of soil feels dry to the touch. Avoid allowing the plant to sit in waterlogged conditions, as this can lead to root rot.

Regular watering encourages lush foliage and abundant blooms.

Cut back dead flower stalks after blooming to maintain a tidy appearance. In late fall or early spring, cut the entire plant down to the ground. This removes dead foliage and prepares the plant for vigorous new growth.

Divide established clumps in early spring or fall. Carefully dig up the plant and separate it into sections, ensuring each division has healthy roots and at least one eye or bud.

Replant divisions immediately and water well.

Repotting is generally not necessary for Astilbe crenatiloba unless grown in containers. If container-grown, repot every 2-3 years in spring into a slightly larger pot with fresh potting mix. Ensure good drainage.