Pruning is not typically thought of as one of the many gardening activities that may be done in the fall, despite the fact that there are several. It can be difficult to cultivate hydrangeas successfully in New Hampshire, and if you want your plants to blossom, there is frequently very little room for error in pruning.
Wait until Spring to prune hydrangeas
In New Hampshire, hydrangeas come in a variety of kinds, and each one has quite distinct growth patterns and pruning needs. Some plants only produce flowers on fresh growth, while others mostly produce flower buds on older wood. In any case, it is better to postpone all hydrangea pruning until spring. Hydrangeas, as with all other trees and shrubs, go dormant in the fall. Not much new growth is produced by them until the next spring. As new growth is more vulnerable to harsh cold at the location of wounds, plants that have been trimmed now run a higher risk of winter damage. Additionally, fall pruning may lessen the quantity of June blooms.
Considerations for pruning hydrangea species commonly grown in New Hampshire gardens
The gigantic blue mopheads or lacecaps known as bigleaf hydrangeas (Hydrangea macrophylla), which are familiar to most gardeners, form their flower heads at the tips of stems on old wood from the previous year. Although lower buds along the stem have the capacity to grow blooms as well, the hydrangea’s blossoming potential is decreased if those buds are died or damaged throughout the winter. Wait until new growth sprouts in the spring before pruning your bigleaf hydrangeas. Approximately 1/4 inch above the first group of live buds, prune the plant. A hint: the interior of living stems will be green, whereas the interior of dead stems will be brown. Cut completely dead stems flush with the base.
The three other hydrangea species that are frequently planted in Fresh Hampshire—oakleaf (H. quercifolia), panicle (H. paniculata), and smooth—all bloom on new growth. Before the emergence of the leaves in the late winter and early spring, remove wasted flowers and prune the plant to improve its general structure and habit.
In conclusion, there are a ton of other activities you can engage in to stay occupied in the garden during fall. Save the spring for hydrangea pruning.
What time of year should I trim my hydrangea?
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.
What occurs if hydrangeas are pruned too soon?
Consider when your hydrangea blooms to see if it grows on old wood. These shrubs typically start blooming in the early summer and stop by midsummer, however isolated blooms may continue into the fall. Late summer or early fall, when the days grow shorter and the temperature drops, these shrubs begin to create the bloom buds for the following year. Pruning should be done just as the flowers start to fade to limit the chance of eliminating these buds. The sooner the shrub recovers after bloom, the more and bigger flowers it will produce the next season.
1. Old blossoms should be taken out to tidy up.
Gardeners can remove any wayward or straggly canes at the soil level and prune wasted blooms just below the flower head to keep their plants looking clean.
2. Eliminate the oldest canes to increase vigor.
A hydrangea may produce lesser blooms as it ages and becomes woody. The shrub will remain healthy and continue to produce big, many flowers if a few of the oldest canes along the soil line are routinely removed. The same technique, which involves removing the tallest canes, can prevent a shrub from becoming too tall.
Watch a video on pruning bigleaf hydrangeas
Almost everyone is mesmerized by bigleaf hydrangeas’ mophead blossoms (Hydrangea macrophylla and cvs., Zones 49). And it appears that queries regarding pruning these flowering bushes are common among gardeners. Because they are shrubs, it is frequently assumed that they require pruning. Some gardeners believe that pruning their hydrangea will encourage it to bloom. Both of these ideas are incorrect. Bigleaf hydrangeas don’t require any pruning, and if you prune them, you risk removing the bloom buds you were trying to receive by timing your cuts improperly.
The flower buds on bigleaf hydrangeas are often found on growth from the previous season, which is known as “old wood.” You will be removing the flower buds if you prune them before they bloom. Pruning too early doesn’t stop the entire display; rather, it stops a large chunk of it for many newer types that really generate buds on both old and new wood. However, if your hydrangea isn’t blooming, improper pruning is frequently to blame. Just after the bigleaf hydrangea has finished flowering is the ideal time to prune it. The shrub will have plenty of time before winter to establish new growth and harden off.
This video will provide you with the knowledge you need to timing your cuts properly and pinpoint where to make them on the shrub if you feel that pruning your bigleaf hydrangea is necessary. Only hand pruners and possibly a pair of loppers to reach deep into the hydrangea will be required of you. Wearing safety eyewear is also advised. While trying to gaze down into the shrub, it is quite easy to poke your eye on a stem, even if you don’t think they are cool. A poke in the eye is also never appropriate.
When pruning hydrangeas 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.
Which hydrangeas ought to be left alone?
Here are several common hydrangea varieties and when to prune them:
- The most popular species of big-leaf hydrangeas, Hydrangea macrophyla, are the well-known mopheads and lacecaps, which come in a variety of shades including blue, violet, pink, purple, red, and white. After flowering, trim them since they blossom in the early summer on old wood.
- Hydrangea quercifolia, sometimes known as oakleaf hydrangea, is a native hydrangea with cone-shaped white blooms that turn a stunning shade of russet in the late summer. It too blooms on old wood, thus pruning shouldn’t be done before flowering.
- Panicle hydrangeas, Hydrangea paniculata: These shrubs (Tardivas, PeeGees) burst into panicle-shaped white flowers in mid- to late summer and are frequently pruned into tree forms. Prune these in the early spring before they produce new foliage since they blossom on fresh wood.
- Hydrangea arborescens, ‘Annabelle’: This variety flowers on new wood as well, so prune in early spring. In the spring, the globe-shaped blooms start out chartreuse and gradually turn white.
recurring, or “Reblooming hydrangeas: This unique breed of hydrangeas was developed to bloom multiple times throughout the growing season. They come in a variety of colors, and “Endless Summer” is one of the most well-known cultivars. This means that these hydrangeas can be pruned at any time because they bloom on both old and new wood.
Remove any dead branches and limbs from a hydrangea that blooms on old wood before thinning down the center of the plant to allow more sunlight to enter. The Tardiva and PeeGee types, which flower on fresh wood, can be trimmed judiciously by removing branches that don’t conform to the plant’s desired shape or regulate size. The most extreme haircuts are available for ‘Annabelle’ hydrangeas, which can have their entire shrub cut back to six to twelve inches above ground.
Do you now comprehend why the query “One of the biggest mysteries in gardening is when to prune my hydrangeas.
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.
Can I prune my hydrangeas all the way down?
These hydrangeas are simple to manage because they bloom each year no matter how they are taken care of or treated. They can be cut down to the ground in the fall and will reappear the next spring with an abundance of blossoms. However, over time, this severe trimming might make the plant gradually weaker.
How far in advance should hydrangeas be pruned?
My two hydrangeas are quite robust, yet they never bloom. How far back should I clip them now, and what can I do to encourage flowering?
A: I followed up by inquiring as to when Tony typically anticipates his hydrangeas to bloom and whether or not he has been routinely pruning them.
They used to bloom in the late summer, according to Tony. He trims them to the ground in the fall.
Usually, incorrect pruning or inadequate light are at blame when hydrangeas stop blooming. It is likely that Tony’s hydrangea bloom on new wood because they do so in the late summer.
It would appear that, despite being a bit early, cutting them back at the beginning of fall has been effective for him. That shouldn’t be a problem because hydrangeas that bloom on new wood are often pruned back during dormancy, from late fall to very early spring.
Since we have a highly active deer population that regularly strips any hydrangeas they can reach, these hydrangeas are a particular favorite of mine.
Growing plants that bloom on new wood allows me to cut back on my late-winter trimming while still allowing the plants to bloom on the new growth the following spring. Deer can eat these plants.
A change in the light is another potential reason. If the plants are grown in a space alongside other plants, it is common for the flowers to diminish over time as the neighboring plants swell and cast more shade.
Although hydrangeas are actually understory plants, we tend to think of them as shade plants. As the amount of shadow rises, however, fewer blooms are produced.
Another option is that there will be more deer, or that a herd will move into Tony’s area, which happens frequently whenever there is new construction, whether residential or commercial, which drives animals out. Deer can cause damage as they travel into places that weren’t previously hotspots since they eat throughout the year. Deer tend to eat delicate shoots and buds from plants.
For instance, we have spent around 17 years in our current house. My hostas and daylilies were mostly unharmed during that time. Nearby, significant projects have been constructed over the past few years, decimating my hosta bed and removing the buds from my daylilies.
This year, we even saw fawns hiding in the front yard by some plants. A bush outside my kitchen window with lovely white variegations on the dark green leaves was one of my favorites, but others, like hydrangeas on a steep slope, have been eaten down.
A: I’ve pruned two out of the three hydrangeas in Westmoreland County, southwest Pennsylvania, just south of Greensburg. I typically trim down 3 feet or so when they reach a height of approximately 9 feet. I was unable to reduce the last one this year because to weather and a backache. Do you believe cutting the final one now will affect No. 3 more than waiting for a day or two of 40 to 50 degrees, which it appears may occur? Or could you just trim the edges off the flower? Thanks.
A: Tom must respond to the same inquiries I posed to Tony. He typically prunes while the hydrangeas are in blossom. It is too late to prune the plants back without losing at least some of the flowers for the following year if they bloom on wood from the previous year.
He ought to be able to remove the dead blossoms without losing any flowers. Tom should trim the wasted flower stem back to just above the next node (where the leaves or branches emerge from the stem).
He can safely cut his plants until early spring if they bloom on new wood because the flower buds for the following year have not yet formed.
Another choice is to do nothing; although his hydrangea will grow bigger the following year, it won’t suffer from lack of pruning. Cutting off the old blooms is a possibility in both situations—new wood and old wood—even though some plants produce hardy flowers that provide the barren landscape some winter charm.
I observe that it is wise to remove old stems from hydrangeas when pruning in order to keep the interior light- and airy-filled. It would be preferable to begin by performing some basic maintenance trimming before chopping back the branches, even though he may be pruning for size. Prior to trimming the length of the remaining branches, look for any broken, diseased, or rubbing branches.
More on holiday plants
I talked about some of the popular tropical plants used for decoration last week. Others, like holly, mistletoe, and cut greens, have the opposite requirements.
Despite appearing to be evergreen, all of these plants require moisture, so you should think about misting them, especially if you plan to exhibit them indoors.
Holly is actually better kept outside since, as they dry and fall, the prickly leaves hurt to touch. Additionally, the holly lasts a lot longer outside.
Another plant that needs particular care is mistletoe. Most sprigs have fake white berries, but others have actual ones. Watch out for any dropped mistletoe berries because they are deadly, especially if you have or anticipate guests who will bring pets or small children.
The greens, wreaths, and garlands are intended for temporary inside display, so it’s time to move them outside when they begin to lose a lot of needles or turn brown.
If you utilize cooler LED lights instead of hotter incandescent ones, the displays with lights will last a lot longer.
Week in the Garden
Planting:
- To add color to the winter landscape, use holly, miniature evergreens, cut greens, and pansies.
- Remaining spring-flowering bulbs should be potted and kept at a cold temperature of 40 degrees or lower for 8 to 12 weeks before being brought inside for forcing.
- Plant seeds that need a period of cold weather for germination.
Seasonal:
- Buy Christmas presents and gift cards for gardeners on your list.
- Clean, examine, fix before hanging decorations, and throw away broken ones. Secure all decorations to prevent loss or damage during windy or stormy conditions.
- Clear dead plants and leaves from paths.
- Permit seed-producing plants to stay on the plants so that wildlife can eat them.
- Find a planting location, dig the tree out, and put the soil in the garage if you are buying a live Christmas tree in a pot or wrapped in burlap.
Lawn:
- On the grass, rake, blow, or mulch fallen leaves. Matted leaves can prevent water from reaching the soil and promote mold issues.
- Water freshly seeded or sodded lawns until the ground freezes, and provide additional watering during weeks with less than an inch of rainfall.
Chores:
- To prevent winter damage, bring mobile pots and garden ornaments inside, or wrap large statues. Terra cotta, clay, or plastic empty pots should be kept in a dry, protected environment to prevent breaking.
- Till extremely early spring or late winter, stop pruning.
- Mark off new plantings, beds, delicate plants, and plants that are slow to emerge from winter dormancy in the spring. When decorating or removing snow, stay away from them.
- When the ground freezes, spread mulch for the winter.
- To check for new growth, inspect stored amaryllis bulbs. Water, followed by a warmer location and gradually increasing indirect light.
- Garden waste should be removed and composted. Get rid of or destroy sick or infected plants.
- Topdress now with compost or manure, then till the following spring.
- Until the ground freezes, water any new crops whenever we go more than a week without receiving more than an inch of rain.
- Check the caulking on the windows and doors. Make repairs right away to keep mice, ladybugs, and stink bugs out.
- Remove any standing water.
- Protect delicate plants from deer, rabbits, and groundhogs. Reapply taste or odor inhibitors.
- Regularly clean and restock bird feeders. Clear away the empty hulls and spilled seed. At least once each week, empty, scrub, and refill birdbaths. In cold weather, think about getting a heater.
- Rainwater runoff should be directed away from building foundations by clearing gutters.