Japanese plums require consistent moisture, especially during fruit development. Water deeply when the top 2-3 cm of soil feels dry. Avoid waterlogged conditions, which can lead to root rot.

Reduce watering slightly in late fall and winter when the plant is dormant.

Prune Japanese plums in late winter or early spring while dormant to shape the tree and remove dead or diseased branches. Summer pruning can be done to control size and improve fruit set by removing water sprouts.

Aim for an open, vase-shaped canopy.

Japanese plums are typically propagated by grafting onto rootstock. Seed propagation is unreliable for maintaining desirable fruit characteristics. Grafting is usually performed in late winter or early spring.

Cuttings are difficult to root and generally not recommended for home gardeners.

Repotting is primarily for young, container-grown Japanese plums every 2-3 years, typically in early spring before new growth emerges. Select a pot only slightly larger than the current one.

Use well-draining potting mix. Mature trees in the ground do not require repotting.