How to prune english walnut 'serr'

Late winter (dormant, late January to early March) in dry weather. Thin crowded interior branches to open the canopy and allow light to reach lower fruiting wood. Remove dead, diseased, or crossing branches. Early-leafing habit means buds break relatively quickly in spring — prune before green tip shows. Never remove more than 20% of the crown at once.

Annually. English Walnut 'Serr' is a heavy-bearing, early-leafing Californian cultivar prone to producing a dense canopy. Annual pruning in late winter is important to open the structure, improve light distribution, and support heavy crops. Prune during dry dormancy to reduce exposure to walnut blight, which exploits fresh wounds when conditions are wet.

Thin crowded interior branches to open the canopy and allow light to reach lower fruiting wood. Remove dead, diseased, or crossing branches. Early-leafing habit means buds break relatively quickly in spring — prune before green tip shows. Never remove more than 20% of the crown at once.