My geranium cover have gotten tall or leggy and seem over crowded. Do I have to thin them out? It was used instead of ivy for corrosion control, which works well just not appealing now.
Certified GKH Gardening Expert
You can prune the geraniums back by 1/3 to 1/2, focusing on stems that are woody or leggy. This article will help you: https://www.gardeningknowhow.com/ornamental/flowers/geranium/pruning-geraniums.htm