Huge rose-colored blooms now. Plant is about 8 feet tall and must be 15 or 20 years old. What is the best method for pruning this back down to 5 or 6 feet? All at once or over 3 years?
Certified GKH Gardening Expert
Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/pruning-rhododendrons.htm