How to prune english walnut 'hartley'

Late summer to early autumn (after harvest, before heavy rains); avoid winter/spring when walnuts 'bleed' sap heavily. Train young trees to a single central leader with well-spaced lateral scaffolds. On mature trees, remove dead, diseased, or crossing branches with cuts just outside the branch collar. Cut water sprouts at their base. Seal large wounds only if required by local disease pressure (walnut blight).

Annually for maintenance; structural training in years 1–5. English Walnut 'Hartley' needs careful structural pruning when young to establish a strong central leader and scaffold. Mature trees are lightly pruned each year to remove dead wood and water sprouts. Avoid heavy cuts on mature walnuts — large wounds are slow to close and invite disease. Less is more.

Train young trees to a single central leader with well-spaced lateral scaffolds. On mature trees, remove dead, diseased, or crossing branches with cuts just outside the branch collar. Cut water sprouts at their base. Seal large wounds only if required by local disease pressure (walnut blight).