The type of hydrangea you have will determine when to prune it. It is necessary to prune hydrangeas that bloom on new growth in late winter or early spring. Hydrangeas that flower on old, woody growth must be clipped after flowering in the summer.
The specialists at the seed and plant firm Thompson & Morgan state that most hydrangeas are clipped in early spring, ideally in February or March, with the exception of climbing hydrangeas, which are pruned in summer (opens in new tab).
The clearest indicator that your hydrangea is ready for trimming is when all of the seed heads have dried up and new, vibrant green buds have begun to emerge. When you notice those, you’ll know it’s time to prune, according to Lee Burkhill of Garden Ninja (opens in new tab).
Although many hydrangea varieties are pruned at the same time of year—late winter or early spring—the methods for each variety vary.
Do you need to remove hydrangea blooms that have died?
Your hydrangea shrubs’ blossoms appear to be withering or turning brown. No need to worry—this is merely a signal that it’s time to deadhead—remove the blossoms from the plant.
Deadheading hydrangeas doesn’t cause any damage to the plants at all. Flowering shrubs stop producing seeds when the spent blooms are removed, and instead focus their efforts on developing their roots and leaves. You will be doing your hydrangeas a favor by deadheading because this strengthens and makes plants healthier.
When ought hydrangeas to be pruned?
Depending on which group the plant belongs to, the timing and extent of pruning are determined:
Advice on Pruning for Group 1:
- As the days get shorter and the weather gets colder in the late summer and fall, buds for the following year’s blooms start to form.
- Typically, removing dead, diseased, or damaged branches is all that is required to preserve shape, size, and a healthy plant. Otherwise, gentle pruning ought to be practiced.
- In the summer, trimming should begin as soon as flowering ends, but no later than August 1. Pruning should not be done in the fall, winter, or spring because you risk removing fresh buds.
- Tip-pruning the branches in the spring as the leaves begin to appear can promote more numerous, smaller flower heads as opposed to fewer, larger flower heads.
Advice on Pruning for Group 2:
- On the growth of the current year, flower buds form.
- Early in the spring, as the leaves are starting to emerge, prune.
- Just above a node, prune branches back by half to a third.
- After that, prune any fragile or spindly branches.
- Minimal trimming encourages huge, strong bushes with many of tiny flower heads in H. arborescens. Hard pruning between 12 and 18 inches from the ground, or even all the way down, will result in fewer but larger flower heads that may flop if unsupported.
- For H. paniculata, remove the surrounding smaller wood while leaving the larger stems in order to establish a sturdy foundation.
Pruning may be connected to flower head size. Shoots will grow more vigorously and flower heads will be bigger and fewer with more rigorous trimming. Smaller but more numerous flower heads may result from less aggressive or tip pruning.
Consideration of hydrangeas’ mature size is the best piece of advise. Place them in a location where they won’t outgrow and won’t need a lot of pruning to keep them in check. Hydrangeas don’t need to be pruned precisely or often; as long as dead wood is removed, they will remain healthy and continue to develop and bloom.
How should hydrangeas be pruned after flowering?
In the late winter, early spring, or just above a big bud known as a heading cut, trim back stems. The flower heads of these plants have a conical form. I wait to prune these until late winter or spring because I advise leaving the dried, tan flower heads on the plant to add some winter beauty to your garden. Favorite panicle hydrangeas include:
- H. paniculata ‘Bulk’ PP16, 812, Quick Fire
- (H. paniculata ‘Limelight’)
- Berry White (H. paniculata ‘Renba’ PP28, 509) first editions
What happens if hydrangeas aren’t pruned back?
If and when you prune is the key to happy, healthy hydrangea flowers. Of course, fertilizing and offering the ideal environment have a lot to recommend them. However, if you don’t prune properly, your efforts will be in vain. Deadheading is not the same as trimming. Pruning refers to more drastic cutting to preserve shape or remove dead growth. However, feel free to discard spent blossoms or cut fresh ones to use in arrangements.
Hydrangeas can bloom on either fresh wood or old wood, depending on the species. The wood from which they blossom determines whether and when to prune.
Old wood-blooming hydrangeas do not require pruning and benefit from it. They’ll blossom more abundantly the next season if you leave them alone. But feel free to deadhead or gently thin. Just keep in mind that while new growth may appear, it won’t bloom until the following season. In our region, four different species blossom on aged wood. Additionally, they are not limited to the hues displayed here.
Climb using suckers. On your wall or trellis, resist the desire to remove the dormant growth.
The flower heads are more conical in appearance, and the leaves are large and resemble oak leaves. It’s a pleasant surprise for a hydrangea when its leaves turn reddish-orange in the fall.
They are very comparable to lacecap types, but smaller and with more compact leaves.
Pruning should be done in late winter or early spring on hydrangeas that bloom on new wood. Trim back to two feet to prune to shape. The next season’s blossoms are produced by strong, fresh growth that is encouraged by trimming. In our region, there are two types that bloom on fresh wood. They are also not restricted to the colors displayed.
Oakleaf variants are not included in cone-shaped blooms. Keep the blooms on throughout the winter to provide interest; even dried out, they are quite lovely.
regarded as a wild kind. They often have smaller blooms and leaves than Bigleaf variants and are completely white. They enjoy full sun and can grow very tall.
Knowing whether or when to prune now will help you avoid the disappointment of a hydrangea that doesn’t blossom. Don’t forget that a robust shrub will produce more gorgeous blossoms if it has well-draining soil and good organic fertilizer. Come on in, and we’ll show you where to go to develop your green thumb.
Do I need to remove Brown hydrangea blossoms in the winter?
Myers advises leaving the dried blossoms on your hydrangeas if you’re looking for an easy way to spice up your winter yard. Bigleaf hydrangeas produce their final rush of flowers in the fall, so to enjoy the dried blossoms all winter long, stop deadheading at that time. To aid in the production of healthy buds in the spring, these can be removed.
Cut back these shrubs in late winter before new growth begins
Shrubs that flower on young wood typically start blooming later than old-growth bloomers, beginning in June and continuing until the first frost, because they need to grow and set buds the same year that they bloom. As long as you avoid trimming when the flower buds are opening, these shrubs are understanding if it is not done at a specific period.
1. Trim the flowers all the way back for larger blooms.
These bushes can be completely removed from the ground in late winter or the beginning of spring. If cut severely like this every year, smooth hydrangeas will produce much larger flowers, but many gardeners prefer smaller blooms on stronger stems.
2. Maintain an old growth foundation to lessen flopping
Especially after watering from above or after a heavy storm, the branches of some hydrangeas frequently topple over from the weight of their blooms. Cutting the stems to a height of 18 to 24 inches will help to reduce this flopping by creating a strong framework for fresh growth.
Janet Carson is the University of Arkansas Cooperative Extension Service’s horticulture specialist.
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How much should hydrangeas be pruned back in the fall?
Trimming season for hydrangeas that bloom on new wood runs from late fall through early spring. This group includes smooth and peegee forms, which function well whether they are pruned lightly, to the ground, or not at all. In order to maintain a compact stature and luxuriant flowering, Peegee hydrangeas are frequently pruned into trees with one or two main stems that are between 15 and 30 feet tall.
Smooth hydrangeas can be pruned all the way to the ground; however, the more frequently they are cut, the less able their stems are to withstand the weight of their huge blooms. Smooth hydrangeas grow in mounds that are 3 to 6 feet tall and wide. When the plants are pruned to leave between 18 and 24 inches of growth, a woody base forms that helps the stems support the pompom blooms more effectively.
Where are hydrangeas cut?
Mophead hydrangeas and lacecap hydrangeas, commonly known as bigleaf hydrangeas (Hydrangea macrophylla), are pruned using the same technique.
With its broad, roundish heads of huge petals in colours of blue, pink, green, and white, mophead hydrangeas are a popular choice for gardens. They are therefore a popular shrub option for cottage garden ideas and are also effective shade-giving bushes.
Small blooms in the center of the bloom and a border of bigger petals on the outside help identify lacecap hydrangeas.
The experts at Thompson & Morgan suggest that in order to winterize hydrangeas, “it’s better to leave the faded blooms in place over the winter to safeguard vulnerable new buds from frost damage.”
Early in the spring, while pruning lacecaps and mophead hydrangeas:
- To promote new growth that will produce better blooms, remove one or two of the plant’s oldest, weakest stems at the base.
- Just above a pair of buds, carefully remove any old flowerheads using secateurs.
- Don’t remove any of the blossom buds, please.
- Cut the stems down to the plant’s root system if the bigleaf hydrangea shrub has been neglected and has a lot of overlapping, tangled branches. The hydrangea won’t blossom until the next year, though.
Do I need to remove the Brown hydrangea leaves?
If newly emerging hydrangea leaves or flower buds are exposed to a late-spring frost or chilly winds, they will turn brown. A unexpected cold spell can harm the newly emerging buds and leaves, which are exceptionally delicate and susceptible to injury. This can cause the buds to turn brown and wither away.
Naturally, hydrangeas grow in protected regions under trees that block chilly winds and produce a more stable microclimate that allows the young flowers to open up without facing a serious risk of frost.
Hydrangeas’ newly formed buds and leaves can become mushy and their leaves can turn brown when they sustain frost damage.
Since it is more exposed to the environment, the outermost growth is typically the one that suffers from the worst damage.
Sadly, the harmed flower buds are therefore unable to bloom, and the freshly growing growth is probably not going to recover.
Frost damage to hydrangea flower buds and foliage is more common in exposed areas, so plant or move your hydrangea to a more protected area of the garden, close to your house, or close to some other plants and hedges.
Particularly hedgerows are great wind breakers since they shield your hydrangea from the elements and might lessen the effects of frost.
There isn’t much you can do to save flower buds or younger leaves after they turn brown. As a result, prune back to healthy growth any growth that has been harmed by the frost.
In contrast to the flower buds on the plant’s outermost part, which are naturally less protected, hydrangeas frequently have growing flower buds farther down each branch. These flower buds typically survive a frost.
This implies that your hydrangea can still bloom, but much later and with fewer flowers emerging. With a little patience, you should still be able to enjoy some lovely blooms throughout the Summer.
What makes deadheading and trimming distinct from one another?
Fortunately, all you need for this project are some clippers, gloves, and a pail to gather your cuttings. I really appreciate this multi-snip tool that I discovered last spring for this gardening task because deadheading is typically a little more delicate than full-on trimming. Use anything you have, including regular bypass pruners.
Since I normally go through 1-2 pairs of gloves in a season (due to holes in the fingertips…), I bought these gloves last spring. I was impressed by how lightweight but robust they are. Since I have spare pairs accessible for any garden assistance I may hire, I haven’t even pierced the first pair’s fingertips yet.
General Pruning-Deadheading Tips
(Note: pruning refers to removing any portion of the plant, from large to small – what we’re doing in the summer is small, just cutting back some and trimming.) Deadheading is the practice of removing wasted flowers from plants.
The majority of your perennials and shrubs that have bloomed or are still blooming only require that you “deadhead,” or cut off the spent blossoms. To determine where to cut the dead flower, consider the following two factors:
- Like this buddleia in the picture above, you can prune it back to the first sign of new growth. This small variety (Lo & Behold ‘Ice Chip’) will continue to bloom into the fall thanks to those new stems on the sides that will bear additional flowers.
- OR, you might prune it more, taking further cuts to keep it under control for the planting area. To prevent the plant from getting too huge or to assist it maintain a more aesthetically acceptable form, continue to look for new growth, but further down on the stems.
You’ll also find plants with dead flower stalks and leaves, like the daylily in this image. Your garden will look better into the fall if you take the effort to remove the browning, dead leaves and deadhead the flower stalks. The majority of daylilies have finished flowering, but they will continue to provide grass-like leaves as a backdrop to the garden. However, some types, like Stella d’Oro, will continue to bloom if the dead stalks are removed.
Shearing the plant back is the simplest approach to get rid of all the wasted flowers on perennials with tiny blooms, like hardy geranium. Once the majority of the wasted blooms have been removed from the plant, grab pieces with your hand and chop the entire part off. For a week or two, it won’t look its finest, but it will soon sprout new growth and produce more blooms.
The heavy blooms on mature hydrangeas may be causing the plant to bend and dip, exposing the crowns. It’s the ideal moment to remove the oldest blossoms, especially those at the bottom, so that the leaves can reposition themselves. If you cultivate a reblooming hydrangea, such as Endless Summer, it will keep producing new flowers for you.
The act of gathering all the blooms and decorating the home with vases of fresh flowers after hydrangea trimming in the summer is the greatest part!
You’ve undoubtedly been deadheading individual rose blossoms as they appeared over the previous few months, but your shrub will bloom more quickly if you trim back to a five-leaf junction, where new growth and blooms will develop.
Additionally, you should prune back to new growth to remove any damaged leaves and stems (like I obviously have on some of my roses – if you live in the Pacific Northwest, every rose will get blackspot…). This not only improves the appearance but also helps prevent disease from spreading to the new growth.
Have any advice to offer? Have you come across any plants that benefit from mid-season deadheading, shearing, or pruning? Comment below and let me know!
To get you thinking about fall, check out these additional posts from our Tuesdays in the Garden group!