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A striking, vivid, and lovely way to add colour and texture to your environment is with hydrangeas. Hydrangeas are difficult to resist because of their massive, eye-catching flower heads, which are unmatched in the world of shrubs. Hydrangeas are simple to grow and propagate, are tolerant of most soil types, and produce an abundance of flowers that last for several weeks or even months while bursting with vibrant colour. They come in a variety of hues, such as vivid blues and pinks, icy white, dazzling white, lavender, rose, and even lime green.
Hydrangea pruning can be challenging. The variety will determine when to prune and the best methods to use. Among the most common types are the BigLeaf (H. macrophylla), Oakleaf (H. quercifolia), Mountain (H. serrata), and Climbing (H. anomala subsp. petiolaris) hydrangeas. On stems from the previous season, they all bloom (“old wood).
Pruning should begin after the above kinds bloom, which typically occurs in June and July. Because the flower buds for the upcoming blossoms emerge in the late summer, avoid pruning after August 1. Cut one or two of the oldest stems all the way down to the base to promote branching and fullness. Pruning a plant to the base is necessary if it has been neglected, grown old, or suffered other damage. For the following season, you will lose the blossoms, but you will also revitalise the plant for future years.
Don’t deadhead or remove the faded blooms when pruning the large Mophead kinds for the best results. Winterize them, then trim them back in the early spring (to the first pair of healthy buds). You can deadhead several lacecap types. Reduce them to the next set of leaves beneath the blossom head. Check out this article by Alan Durden, the extension director for Macon County, for additional information about trimming hydrangeas: Hyacinth pruning
Hydrangea species like as Panicle (H. paniculata) and Smooth (H. arborescens) bloom on stems from the most recent season, or “new wood.” Before the flower buds form, late winter is the best time to prune these kinds. If given enough room to flourish, these types require a lot less upkeep. Typically, merely remove the dead branches from a shrub and avoid attempting to “sculpt” it.
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 practised.
- 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.
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.
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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In North Carolina, how are hydrangeas cared for?
Although hydrangeas are advertised as being able to tolerate both full sun and part shade, it is better to grow them in part shade here in the south. They will specifically thrive when planted in a location with dappled shade, morning sun, and afternoon shade. They require nutrient-rich, well-drained soils.
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 favour by deadheading because this strengthens and makes plants healthier.
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.
How are hydrangeas prepared for winter?
Winter winds and cold temperatures both have the potential to be fatal. This catch-all phrase simply denotes plant dying over the winter. The plant may perish due to the low winter temperatures or from drying out brought on by the winds.
Since hydrangeas become dormant in the winter, winter damage to hydrangeas can not become apparent until spring. If your hydrangea doesn’t produce any green shoots in March or April, it could be your first indication of harm.
Protecting the shrubs from winter’s wrath is necessary to avoid winter kill in hydrangeas, which includes the young buds on the plants. Laying down a heavy layer of mulch over hydrangeas’ root zone is a wonderful place to start with winterizing them. For this, straw works wonderfully.
Use a wire cage to enclose the shrub or construct a cage around it using sturdy posts and chicken wire for even better protection. Wrap the cage in burlap or insulating material. Additionally, you should give the plant a lot of water right before the ground freezes.
In the spring, how far back should hydrangeas be pruned?
You can prune hydrangeas paniculata and aborescens more severely without losing this year’s blossoms because they bloom on new wood. Although pruning is not necessary, if it is not done the plant will grow taller, with the majority of its flowers at the top.
Cut back to a healthy framework
Trim the previous year’s growth back to a strong framework that is between 30 cm and 60 cm high in the early spring. On each stem, prune to just above a pair of sound buds. For large flowers, prune back to the lowest healthy buds; less firmly for a more natural appearance or a higher plant.
Watch Monty Don describe the many hydrangea trimming techniques in spring:
Can you grow hydrangeas in North Carolina?
In Eastern North Carolina, any kind of hydrangea can be cultivated, but they do demand evenly moist, well-drained soil.
With morning sun and afternoon light shade, they thrive.
The French hydrangea (macrophylla) and oakleaf hydrangea are the two most common varieties (quercifolia). There are two main flower types on French hydrangeas. The ones known as “mopheads” feature enormous, spherical or conical clusters of lovely flowers with much smaller, seed-producing flowers beneath them. With clusters of tiny seed-producing flowers and bigger showy blooms surrounding them, lacecap types have quite a different appearance.
Depending on whether the soil is acidic (pH < 6) or alkaline, both types have different colours (pH above 7). Blooms can range in colour from a light blue to a deep purple in acidic soil, which is more prevalent in our region. Pink hues are frequently produced by alkaline soils. On one plant, you might even see both blossom hues. And while it is possible to modify some plants' bloom colours, I would advise sticking with what nature provides.
While French cultivars are in flower right now, oakleaf hydrangeas bloom in the late spring (early summer). The Endless Summer series is one of the rebloomers that will continue to bloom throughout the summer.
Knowing whether your hydrangea will bloom on this year’s new growth or last year’s old growth is crucial. This is important because if you prune your shrub in the late fall or early winter, you risk removing the buds for this year’s blossoms, and then you’ll wonder why your plant isn’t giving you flowers. Hydrangeas currently require very little trimming, other potentially shortening errant branches and getting rid of any dead wood. The ideal times to prune are as follows: pruning once-blooming French hydrangeas in the summer; pruning reblooming hydrangeas in the winter; and pruning oakleaf cultivars in the summer.
The lovely autumn foliage of oakleaf hydrangeas, which becomes a vibrant scarlet, is another advantage of these plants.
Therefore, even if you don’t have any of these lovely plants in your yard, you may still enjoy the blooming plants that are currently visible across the city.
How are hydrangeas cared for?
Although the hydrangea’s leaves and flowers seem delicate, little careful care is actually needed for them. Everything you need to know about caring for hydrangeas is provided in these recommendations.
- Over the course of the growing season, water at a rate of 1 inch per week. To promote root growth, deeply water three times each week. All varieties of hydrangeas benefit from constant moisture, but bigleaf and smooth hydrangeas need more water. To water thoroughly while keeping moisture off the flowers and leaves, use a soaker hose. Hydrangeas won’t wilt as much if they are watered early in the day on hot days.
- To keep the soil around your hydrangeas cool and moist, add mulch. Over time, an organic mulch decomposes, supplying nutrients and enhancing soil texture.
- Apply fertiliser according to the type of hydrangeas you have. Every variety has varied requirements and will profit from applying fertiliser at various times. A soil test is the most effective tool for determining your fertility requirements.
- In March, May, and June, bigleaf hydrangeas require numerous mild fertiliser applications.
- Two applications in April and June work best for oakleaf and panicle hydrangeas.
- The only time smooth hydrangea plants require fertilising is in the late winter.
- By selecting cultivars with resistant characteristics, you can avoid pests and diseases. Hydrangeas can have leaf spots, bight, wilt, and powdery mildew. Although they are uncommon on hydrangeas, pests might arise when the plants are under stress. Aphids, leaf tiers, and red spider mites are examples of potential pests. Your best line of defence is to properly care for hydrangeas.
In NC, are hydrangeas perennial?
In the summer, hydrangeas, which are deciduous shrubs, can add lovely blossoms to any Southern garden. Hydrangeas come in a wide range of shapes, colours, and variations. Hydrangeas can be broadly divided into three groups: Hydrangea macrophylla, Hydrangea quercifolia, and Hydrangea paniculata, though there are far too many variants to list them all.
Common names for hydrangea macrophylla include bigleaf, mophead, lacecap, and French hydrangeas. The big-leaf hydrangeas are among the most popular varieties. Depending on the pH of the soil, this group of hydrangeas can produce blue or pink flowers. Because it alters the amount of available aluminium for the plant to absorb, soil pH is to blame for changing the colour of the flowers. Pink flowers grow in alkaline soils, while blue blooms grow in acidic soils (soil pH: 5 to 5.5). (soil pH: 6 or more).
The oakleaf hydrangea is also known as Hydrangea quercifolia. Oakleaf hydrangeas feature leaves that resemble an oak leaf and offer a stunning display of white flowers. In addition to offering a lovely flower display in the summer, oakleaf hydrangeas also provide interest to the landscape with their colourful fall foliage, interesting leaf texture, and appealing bark. Suggested kinds of oakleaf hydrangeas include “Snow Queen,” “Snowflake,” and “Harmony.”
PeeGee hydrangeas are a subgroup of Hydrangea paniculata. PeeGee hydrangeas can reach heights of 10 to 25 feet. PeeGee hydrangeas have panicle-shaped blooms rather than ball-shaped ones. As the petals ripen towards the fall, the blooms are also renowned for taking on a pink hue.
The process of growing hydrangeas is not too difficult. Depending on the cultivar, hydrangeas can reach heights of 4 to 12 feet. The hydrangea’s growth pace is fairly rapid. Choose a spot with well-drained soils when choosing where to plant hydrangeas. In soils with a lot of organic matter, hydrangeas thrive. A site with early sun and afternoon shade is ideal for hydrangeas. They shouldn’t be cultivated in arid, hot climates. Many people consider buying and planting hydrangeas when they see them in bloom in the summer, but the optimum times to plant are spring and fall.
Small amounts of fertiliser applied periodically throughout the growing season are beneficial to hydrangeas. Hydrangeas respond well to a complete fertiliser, such as 10-10-10, applied at a rate of 2 cups per 100 square feet in March, May, and July. When fertilising, it is not required to remove the mulch; however, watering soon after application will help the fertiliser dissolve and go into the soil.
For the North Carolina Cooperative Extension in Wayne County, Jessica Strickland works as an agriculture extension agent with a focus on horticulture.
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