How to Prune Winter's bark?
Usually little pruning is needed. Lightly shape if necessary, removing dead, damaged or diseased shoots. Prune after flowering.

Winter's bark · Drimys winteri
Also known as: Winter cinnamon
Grow in a well-drained soil in a sheltered position in full sun or partial shade
Usually little pruning is needed. Lightly shape if necessary, removing dead, damaged or diseased shoots. Prune after flowering.