On garden mums, what do they mean by 'pinch for full growth'? After a freezing winter, how much of the dead or dormant growth should be cut off? I cut some to the ground and the plant did not grow again.
Certified GKH Gardening Expert
This article will help you with understanding more about pinching plants: https://www.gardeningknowhow.com/garden-how-to/info/pinching-plant.htm
Garden mums are not as hardy as nurseries would like people to believe. They have a hard time surviving the winter and you can expect about a 50/50 chance of them surviving regardless of what you do. You trimmed them correctly. It was the winter cold that killed them.