Cut back lavender in winter? How to properly care for the Mediterranean shrub. The optimal time window for the first pruning is the end of February to mid-March.
According to Ökotest, the flower stalks should be cut back by around a third. It is best to leave the lower young shoots and the green leaves standing. If you miss the time for the second pruning, you should wait until spring at least. From September you should no longer use the scissors, otherwise the frost can damage the lavender.