Fall Blooming. Exactly what you do depends on what kind of hydrangea you have and where it lives. Pruning reduces the number of resources the plant needs. When it's time to prune, focus first on removing dead or dying branches. Prune in late winter and early spring. Read more about pruning hydrangeas, and learn whether your shrub blooms on old or new growth in “Pruning Hydrangeas” by Janet Carson. The timing of pruning for hydrangeas depends on which type of hydrangea you’d like to prune. "Hydrangeas set flower buds for the following season in fall, so if you cut it back, you are cutting off all of the blooms," explains McEnaney.Instead, hydrangeas should be pruned in the spring—preferably past Father's Day, if you can wait that long. Prune out deadwood and weak growth. If your hydrangeas live in a cold climate, late fall weather is the perfect time for them to harden off, you can use this same time to prepare them to make it through the coming winter. Hydrangeas of this type produce flowers from side shoots, which can be pruned in fall after blooming has ceased. https://homeguides.sfgate.com/should-cut-hydrangea-back-fall-97045.html When to prune hydrangea bushes varies and is not an exact science. It will grow from that point onward, getting larger each year. Hydrangeas should never be pruned in the fall.Why? Depending on your preference, you can make pruning cuts right down to the ground, as new shoots will be generated. It will grow from that point onward, getting larger each year. But, the volume and appearance of the flowers won’t be as good as if you prune it back. They do flower on new growth so hard pruning if necessary will not affect flowering but can … That may be why she recommends a different pruning schedule. By pruning right after the blooms have faded, you allow the plant time to set buds for the next year. Prune as far back as you want right above the first leaf joints. This causes more energy and nutrients to be available to the plant. If you prune them in early spring, you risk cuting off the dormant flower buds. Prune Incrediball hydrangea plants anytime between the first hard frost of fall and early spring. Pruning can allow more sunlight and air to filter through the trees and shrubs, which can help keep them healthy. Prune as far back as you want right above the first leaf joints. If you don’t prune hydrangeas, they will flower just fine. Cut back after flowering to the second pair of leaves below the head in order to prevent seed developing. Prune in late winter and early spring. Hydrangeas that bloom on old wood should be pruned in summer before they set buds for the following year. Lacecaps can be treated the same way or, as they are hardier than mopheads, can be pruned in autumn after the flowers have finished their late summer display. 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