Manchurian Walnut requires consistent moisture, especially when young. Water deeply when the top 5-10 cm of soil feels dry.

Mature trees are more drought-tolerant but benefit from deep watering during prolonged dry spells to ensure robust nut production and overall health.

Prune in late winter while the tree is dormant to shape the structure and remove dead, damaged, or crossing branches. Early pruning encourages good scaffold branch development.

Avoid heavy pruning in summer, as it can stress the tree and increase susceptibility to diseases.

Propagation is typically done from fresh seeds sown in autumn or stratified and sown in spring.

Grafting onto compatible rootstock can also be used for specific cultivar propagation, though it is less common for this species. Seedlings may take several years to reach maturity and produce nuts.

Repotting is generally not applicable to Manchurian Walnut as it is a large tree typically grown outdoors. For young container-grown specimens, repot in early spring before bud break every 2-3 years into a larger container with well-draining soil to accommodate root growth.