Apr 12, When you prune these hydrangeas only cut away dead wood in the fall or the early spring. When you are pruning you can cut one or two of the older stems down to the base so that new branches grow with better fullness.
If your plant is older or damaged you can prune all of the stems to the treecutting.buzzted Reading Time: 2 mins. Apr 17, Pruning is not essential, but left unpruned the plant will get taller, with most of the flowers at the top. Cut back to a healthy framework. Cut back in early spring, pruning last year’s growth back to a healthy framework that’s between 30cm and 60cm high. Prune to just above a pair of healthy buds on each treecutting.buzz: BBC Gardeners' World Magazine.
If you prune them in early spring, you risk cuting off the dormant flower buds. By pruning right after the blooms have faded, you allow the plant time to set buds for the next year. Oakleaf (H. quercifolia) and bigleaf hydrangea (H. macrophylla), including Nikko Blue and all the other pink- and blue-flowering cultivars, bloom from buds set the previous year.
Dec 29, Smooth Hydrangeas are a breeze to care for - when the plants have gone dormant, take a hedge trimmer or pruner and cut all the stems down to between 6” and 12” in height. Do not prune them during the growing season or you will remove the flower buds and may miss out on the flower treecutting.buzzted Reading Time: 5 mins. Aug 20, Prune the hydrangea to reduce its size.
If your hydrangea has grown quite large, you can prune it in June or July (just after the blooming season) to contain it a bit. Trim back the branches by 1/3 to the nearest joint. In most cases hydrangeas will grow back quite quickly, so you may not be able to maintain the smaller size for treecutting.buzz: K.