Have LARGE sloped hill covered with geranium. Will they have to be pruned back and thinned out for winter each year?
Geranium as Ground Cover
Certified GKH Gardening Expert
If it is hardy geranium, then no, you will not need to do anything with them. If it is pelargonium (the tender perennial that is often referred to as geranium), then if you are in a zone where the plant survives year round, it will start to get leggy and woody after awhile and some pruning will help to keep it low growing and green.