Any landscape is more beautiful with hydrangeas. Both their huge, spectacular blooms and their beautiful foliage are attractive. Additionally resilient, resistant to disease and insects, and versatile, hydrangeas are. They thrive in a variety of soil types and can withstand moisture better than the majority of other woody plants. One disadvantage is that various cultivars require various pruning techniques, and many gardeners are unsure about when and how to trim them.
The earliest hydrangeas that flower before July are those that bloom on old wood from the previous year’s growth. Those that flower later in the season—after July—do so because blossom buds on newly developing wood from the current year are blooming.
A safe rule for all varieties of hydrangeas is that no pruning is preferable to improper trimming if you are unsure of the variety you have.
A straightforward strategy that works for all varieties of hydrangeas is to restrict pruning to:
- Winter-dead wood In the spring, trim off all dead branches just as the buds start to open. By using a knife to scrape the bark, you may check the stem for life. If the underside is not green, the plant is dead and needs to be removed.
- Rejuvenation
- Even the healthiest hydrangeas lose old wood. Remove old or dead stems by cutting them off at the plant’s base in the early spring. This will encourage new growth and result in a later in the summer more robust bloom set.
- wilted flowers The safest pruning technique is known as “dead-heading,” because it cannot be done incorrectly.
Bigleaf hydrangea (Hydrangeamacrophylla)
In Maryland, this variety of hydrangea is the most popular. It boasts big blue, pink, red, or purple flowers as well as lovely, shiny foliage. These hydrangeas come in two varieties: mophead and lacecap. Each is pruned in the same manner. The repeat bloomers, which bloom on both the old wood from the previous year and the wood from the current season, are also included in this category of hydrangeas. ‘Endless Summer’ is a well-known cultivar of the repeat bloomers, although there are also numerous more recent repeat flowering cultivars that are readily accessible.
Bigleaf hydrangeas may need to be pruned because they have grown too large. However, excessive pruning will significantly decrease or even stop flowering. After the blooming season, in the late summer, dried flowers can be removed. However, it’s better to hold off until early spring when new growth starts to appear to make sure you are just removing weak or dead sections and not live stems that have flower buds. Hard renewal pruning may be required for hydrangeas that are very old and in decline. All branches should be pruned back to the ground. The blossoms for that year will be lost as a result, but the following year should be very fruitful.
In the genus macrophylla, some well-known cultivars of distinction include “All Summer Beauty,” “Altona,” “Dooley,” “Europa,” and “Nikko Blue.” However, every season sees the introduction of new cultivars into the landscape industry.
The pH of the soil affects the macrophylla species’ flower color. Low pH results in blue blooms, while high pH results in pink or red flowers.
Smooth hydrangea (Hydrangea arborescens)
It is a common component of domestic landscapes and is a native of North American forests. This species is the simplest to prune because it produces white flowers on fresh wood from the current season. Simply give it a severe springtime trim. Cutting all stems back to around 12 inches from the soil line really promotes flowering. The cultivars “Annabelle” and “Grandiflora” are well-known examples.
Pee Gee hydrangea (Hydrangea paniculata)
This is one of the biggest hydrangeas and it comes from the East. It has a 25-foot height limit. Its fragile stems are susceptible to breaking under a weight of white flowers in windy conditions or under heavy snowfall. To maintain the plant’s vitality, cut off damaged stems as they appear. It also blooms on the wood of the current season, just as the smooth hydrangea. In fact, spring pruning will promote flowering and aid in controlling the plant’s size. Simply remove any damaged stems and spent blooms if the size is unimportant. The cultivars “Barbara,” “Bridal Veil,” “Brussels Lace,” “Chantilly Lace,” “Grandiflora,” and “Limelight” are among the best.
Oakleaf hydrangea (Hydrangea quercifolia)
Beautiful native to the Southeast of the United States, the oakleaf hydrangea is a favorite of many gardeners. Even without the huge, towering, 12-inch flowers, the foliage is magnificent. On old wood from the previous year’s growth, it produces its blossoms. It blossoms in Maryland in June, but the flowers last all summer and gradually transform from white to pink before turning tan in the winter. After flowering, if necessary, prune to preserve the desired size and shape. Deadwood from the winter can be cut down at any time.
Climbing hydrangea (Hydrangea anomala subsp. petiolaris)
This variety of trailing vine grows quickly, is appealing, and requires little upkeep. The only pruning required is to cut off stray stems that are not wanted to regulate their growth. As the vine quickly produces new stems, you might need to repeat this process multiple times throughout the season. It blooms in April and May on old wood from the previous year in central Maryland. After blooming, prune them to prevent diminishing bloom.
Which month do you prune back hydrangeas?
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.
Do I need to trim my hydrangea back for the winter?
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.
In the fall, how far back should hydrangeas be pruned?
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.
Should I prune my hydrangeas in the fall?
Whether or not to prune your hydrangea in the fall is a common query on every gardener’s mind. Everything is dependent on the kind of hydrangea you have. Some species flower on ancient wood, which means that their flower buds were created the season before. You just sacrificed the blooms for the following season if you cut back a stem in the fall that has flower buds on it.
Other species can only grow on new wood, which implies that the growth of the current season is where their flower buds develop. These varieties are excellent for colder locations since there is little risk that the flower buds may suffer throughout the winter. Some more recent arrivals combine the qualities that allow them to bloom on both new and aged wood.
The four most typical varieties of hydrangea are as follows:
- Hydrangea paniculata, sometimes known as Pee Gee Hydrangeas, is a type of hydrangea that only blooms on fresh wood. This group can be pruned in the fall or very early in the spring, but to lower the danger of harm, we strongly advise waiting.
- Hydrangea arborescens, sometimes referred to as smooth hydrangeas, bloom exclusively on new wood. These can also be pruned in the fall, but we advise waiting until the first few days of spring.
- Hydrangea quercifolia, sometimes known as oakleaf hydrangeas, is a species that only blooms on ancient wood. As a result, pruning should be done as soon as the blossoms of the current season start to fade, and at no other time.
- Hydrangea macrophylla, also known as mophead hydrangeas, are a challenging genus. On old wood, all types bloom, but some, particularly more recent arrivals, bloom on both old and young growth. These hydrangeas should only be pruned shortly after the flowers have faded.
How are hydrangeas prepared for the winter?
Protecting flower buds is the aim of winter hydrangea care. The simplest approach is to pile 12 inches or so of mulch made of chopped-up leaves or bark around the base of the plant. After the ground freezes in the late fall, set the mulch pile there. Plants can then be exposed in the spring, when the temperature starts to stay above freezing.
Should I remove the brown blooms on my hydrangea?
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 and how should hydrangeas be pruned?
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.