Preferably cut in spring
Autumn is not a good time to cut back ornamental grasses. The main reason why it is not advisable is that moisture can penetrate through the cut stalks, flow downwards and lead to rot in the root area. It is better to cut back in spring between mid-February and (at the latest) mid-April - before the new plant shoots.
Further advantages of spring pruning for almost all types of ornamental grass are:
- Straws protect against the cold and thus increase winter hardiness
- Plants can seed themselves
- Shelter for insects and birds is guaranteed
Ornamental evergreen grasses do not need to be cut. It is enough to pluck out old and dead parts.