How to Prune cuckoo flower?
No pruning required

cuckoo flower · Cardamine pratensis
Also known as: bread and milk; cuckoo buds; cuckoo spit; lady's smock; meadow bittercress; meadow cress; spinks; spring cress; cuckoo bread; lady's flower; mayflower
Suitable for growing in a flower border, rock garden or woodland
No pruning required