Hakone Grass prefers consistently moist soil, especially during its establishment phase and hot, dry periods. Water deeply when the top 2-3 cm of soil feels dry.

Avoid waterlogged conditions, as this can lead to root rot. Reduce watering in winter when the plant is dormant.

Prune Hakone Grass in late winter or early spring before new growth begins. Cut back the old foliage to about 5-10 cm above the ground to tidy the plant and encourage fresh, vibrant growth.

Remove any dead or damaged leaves throughout the growing season as needed.

Hakone Grass is primarily propagated by division. In early spring, carefully dig up the plant and divide the root ball into smaller sections, each with healthy roots and shoots.

Replant the divisions immediately into well-draining soil. This method is simple and effective for increasing plant numbers.

Repotting is rarely necessary for Hakone Grass unless it is grown in a container.

If the plant becomes root-bound in a pot, typically every 3-5 years, repot it in early spring into a slightly larger container with fresh, well-draining potting mix. Ensure the new pot has adequate drainage holes.