For those of us who live in northern climes with more severe winters, The Endless Summer series represents a milestone in hydrangea breeding.
Older hydrangea kinds only produced flowers on old wood or stems that had grown the previous year. All flowers for the following season were gone once that growth was destroyed due to harsh winter circumstances, damage, or unintentional autumn trimming.
The plants in the Endless Summer series are significantly more adaptable in the environment because they bloom on both new and old wood. The plants won’t generate many, if any, buds on the growth of the current season, though, if the plants are not properly nourished in the spring.
Any Endless Summer variety will grow best in an easterly direction or in a spot in the garden that receives morning sun and afternoon shade. To make a richer soil that will store nutrients and fertilizers better and retain more moisture, use a decent compost.
Use Plant-tone and granular lime for purple to pink blossoms or Holly-tone and holly for blue flowers when fertilizing your Endless Summer Hydrangeas in the spring.
We advise fertilizing in April, May, and June with 1 cup of fertilizer for every foot of branch spread for the optimum flowering. For instance, 9 cups of fertilizer would be applied over a three-month period to a plant that is 3 feet broad. After this time, fertilizer shouldn’t be used to plants.
Continual Summer Fall is not the time to prune hydrangeas. Rather, only prune them in May. This will guarantee that the flower buds that survived the winter have opened.
Plants marked with a number sign (#) and a number are generally the same size as gallon pots; for example, #2 is equivalent to a 2 gallon pot, #3 to a 3 gallon pot, and so on. These plants are offered for sale in pots.
Plants with a height (such as 5-6′) give an estimate of the plant’s present height.
Plants that are measured in inches (such as 2.5″) are identified by their caliper, or trunk width.
Plants are typically larger when measured by caliper (inches) than when assessed by height (feet).
How should hydrangeas be pruned in the spring?
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.
In the spring, should you prune your hydrangeas?
Hydrangeas with mopheads and lacecaps (Hydrangea macrophylla) bloom on the growth from the previous year. They defy the generalization that shrubs that produce their flowers on the growth from the previous season should be clipped after flowering. The optimal time to prune hydrangeas is in the spring because of the way their stems are built. This is due to the stems’ cork-like, as opposed to woody, nature, which allows them to store enough moisture during the winter for this to freeze in cold temperatures. The stems and their buds may freeze if they are clipped in the fall, following flowering. The stems and their new buds will be better protected if the old flowers are left on the plant throughout the winter, until the severe frosts have passed. These buds will open as the sap begins to rise in the spring, and many of them should go on to bear blooms the following year.
What occurs if your hydrangea isn’t pruned?
Hydrangeas can eventually resemble a tangled jumble of woody stalks if they aren’t pruned, and their flowers will get smaller and less beautiful as a result. Lack of pruning is frequently the cause of your hydrangeas’ failing to bloom.
Regular pruning of hydrangeas promotes new growth and a better display of blooms while also helping to keep them in form.
The experts at Thompson & Morgan say that “it’s this vigorous, new growth that ensures you have lots of huge, healthy flowers to enjoy in the years to come.”
On aged wood, does Endless Summer hydrangea bloom?
Old wood is the growth of a plant from an earlier growing season. Endless Summer hydrangeas produce big, numerous, lovely blooms year after year by blooming on both old and new wood.
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.
When should I prune the hydrangea’s flowers?
Late summer to early fall (August to September) sees the development of these plants’ bloom buds for the next year. So, before August, prune these shrubs once they are finished blooming (again, make a heading cut).
The Endless Summer is an exception. The Original Bigleaf Hydrangea (H. macrophylla ‘Bailmer’ PP15,298) as well as many cultivars from Bailey Nurseries’ Endless Summer line, including Blushing Bride, BloomStruck, Summer Crush, and Twist ‘n’ Shout.
On the wood from last year and any new wood that sprouts this year, the H. macrophylla blooms. Therefore, whether you prune it or not, it will bloom. A big, 4-foot-tall ring of hardware cloth can keep rabbits from nibbling on the stems of H. macrophylla over the winter.
The pink to blue tint of the Endless Summer hydrangea’s flowers (achievable with the right soil amendment) plus the fact that it blooms on both old and new wood caused it to make a big splash on the Minnesota landscape plant scene.
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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Should Endless Summer hydrangeas be deadheaded?
According to Meyers, the species of hydrangeas will determine the optimal time to prune them. When the initial set of flowers emerges from the previous year’s growth in the spring on bigleaf hydrangeas like Endless Summer, she advises, “deadheading to remove the faded blossoms before the next flush arises.” As long as the cut is made before July or August, when the plant starts to create buds for the blooms of the following year, you can make a deeper cut for a longer stem. She advises removing the faded blooms off smooth hydrangeas as soon as they turn green in order to guarantee a second flush of smaller flowers in the fall.
How should a leggy hydrangea be pruned?
With all varieties of hydrangea, it pays to grow a robust, bushy plant before you consider flowers. The first few years following planting are crucial for hydrangea trimming because they lay the groundwork for future years.
It is best to pinch or trim your plant when it is young in order to develop a robust, well-branched plant. A plant will produce twice as many branches and ultimately more flowers if the growth tip is removed.
If the plant was lanky when you bought it, hard-shear it back by a third to a half of its original size. Pinch the branch tips to remove only the growing tip once it has added one or two inches of growth. This point regulates branching. The buds beneath it will develop into two or more stems when it is removed. Pinch the tip out once again when these young branches have grown an inch or two.
As you take care of your garden, you can keep doing this all through the first growing season. This method produces a well-branched, full-bodied plant that will have more flowers in coming years, even if you may lose one year of bloom in the process.
Repeat the pinching procedure for the second growing season (or lightly shear). Stop trimming and pinching so that the flower buds can form.