This is a test of commonsense. Complete the next sentence:

How to prune rosa rugosa
Know when to prune.
Most pruning should be done once the plant enters its dormant season. This can be any point in time between late autumn and early spring.
The best time to prune is in the early spring, after the danger of frost has passed. Pruning makes a plant vulnerable, and vulnerable plants tend to be weaker against the cold frosts of winter.