How to prune hazelnut 'winkler'

Late winter to early spring, just before catkins open. Cut the oldest, most crowded stems to about 40 cm above the ground in a rolling three-year rejuvenation cycle (one-third per year). Remove all basal suckers cleanly at the point of origin. Trim branch tips in March to encourage bushy regrowth where needed.

Annually — sucker removal plus one-third stem renewal. Hazelnut 'Winkler', like other Corylus avellana cultivars, benefits from annual removal of suckers and selective thinning to keep the open-vase structure productive. Removing one-third of the oldest stems each year (over a three-year rotation) renews the framework without shocking the plant. Remove suckers promptly as they divert energy from nut production.

Cut the oldest, most crowded stems to about 40 cm above the ground in a rolling three-year rejuvenation cycle (one-third per year). Remove all basal suckers cleanly at the point of origin. Trim branch tips in March to encourage bushy regrowth where needed.