The smooth hydrangea (Hydrangea arborescens) flowers on new wood and should be pruned down hard to 1 foot in early March. This species propagates itself by. Therefore, if you prune them in late fall, winter or early spring, you will be cutting off that season's flowers. If drastic pruning is required, do it. 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”. Only prune in June or July! Only prune if the shrubs are too large for their space. Don't be afraid to remove dead stems or flowers anytime of the year – this. It's best to prune these shrubs in February-March so that there's plenty of time for the plant to grow strong, new, upright stems on which the large flowers. If your hydrangea blooms on old wood (stems from the previous grow season) you should prune the bush immediately after it's flowers begin to fade. prune4.
If there's any dead or spindly stems, cut them down to the ground. If you're pruning the shrub to control its size, you've probably got it in the wrong place. Bigleaf hydrangea bloom on one-year-old wood. With that in mind, prune these plants within four to six weeks after blooming. To rejuvenate these plants, prune. You look at the plant, not the calender, and you prune the plant as needed. Ideally the best time to prune any Hydrangea is right after it blooms. Write that on.
Bottom-line: Smooth hydrangeas can be pruned back to the ground in late winter or early spring. While they could be pruned in fall, we highly advise waiting. Do so by cutting off dead flower heads at a degree angle at the top of the stem, just under the old bloom. This way, you can trim the shrub before it begins. Starting in late summer, you can deadhead spent flowers (or leave them up as winter interest), and trim any dead or crossing branches. · Anytime between late.
To reduce the risk of removing these buds, prune just as the flowers begin to fade. Often, the earlier you get it done after bloom, the quicker the shrub can. Prune back stems to just above a fat bud — called a heading cut — in fall, late winter, or spring. These plants have conical-shaped flower heads that provide. 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.
All you need is a sharp pair of secateurs and you're ready to prune. I prune mine here in the UK in late February. It doesn't take long to prune hydrangeas and. Once the shrub is established and has a couple of growing seasons under its belt, prune these hydrangeas in the spring down to the ground, or not at all if you. To encourage abundant blooms and keep plants a manageable size, smooth hydrangeas are typically cut back to the ground in late winter or early spring. For the most part hydrangeas only need to be cut after the flowers fade through August 1st. Pruning after that could cause the plant not to bloom in the spring.