Pruning should be done as soon as the blooms begin to fade. This year, Ellie’s plant did not blossom, so she will have to rely on viewing other plants in the vicinity. A little pruning in late winter or early spring to begin reshaping may be her best option, followed by a more radical cutting back after she enjoys the blooms next season.
What month do you prune oak leaf hydrangeas?
The oakleaf hydrangea is a deciduous, blooming shrub that is great for borders, bulk planting, and foundation planting. The flowers are pink, pastel purple, and creamy white in color and bloom throughout the summer and fall. Although this hydrangea doesn’t require much pruning, a little cut once a year will keep it looking tidy. Oakleaf hydrangeas bloom on the previous season’s growth, so prune in the fall or early winter after blossoming.
Should you cut back oakleaf hydrangea?
Soil Oakleaf hydrangea grows best in moist, organic, fertile, well-drained, slightly acidic soil with a pH of 5.06.5. It is drought resilient once planted, but it does benefit from water in extremely dry conditions. It’s critical to have good drainage. Although the plant prefers damp soil, wet feet are not an option.
Full to moderate shade is fine for this shrub.
It does, however, perform better when exposed to the sun for at least a full day or more, resulting in a richer floral show, stronger stems, and more beautiful autumn foliage.
Some cultivars can tolerate a more sunny location. On the other hand, heavy shadow produces fewer blossoms but larger leaves.
Trimming – Oakleaf hydrangeas require very little pruning, if any at all.
If pruning is required to shape or reduce the size of the shrub, do so soon after the flowers have faded.
Late in the summer, this shrub produces bloom buds for the next year.
To put it another way, it grows on ancient wood.
Pruning at any other time of year will result in the loss of the blossoms for the next year.
Insects This plant is rarely bothered by insects, with the exception of spider mites and aphids.
Deer will nibble on this plant, especially the sensitive, new spring foliage, so use a deer repellent or a physical barrier to protect it.
Propagation – Stem cuttings can be used to propagate the plant. The plant can also be propagated by layering because the branches are low to the ground.
When used as a solitary specimen, a backdrop to smaller shrubs, bulbs, or perennials, a component of a mixed border, a deciduous hedge, or a mass planting, oakleaf hydrangea is a powerful yet elegant shrub.
If oakleaf hydrangeas have a flaw, it’s that their enormous, coarsely textured foliage might be intimidating to a novice gardener. Rest confident that the foliage mixes in beautifully with plants with smaller leaves. Evergreens, for example, with their finer needles and scaly branches, provide a nice contrast. Boxwoods’ more formal round shape and compact, thick leaves contrast nicely with the looser appearance of oakleaf hydrangea. Oakleaf hydrangeas pair well with taller ferns like ostrich or cinnamon ferns, as well as shorter grass-like plants like liriope.
Easy-care The oakleaf hydrangea is particularly beneficial in the landscape because it provides year-round interest. It makes an immediate impact in the spring when its bold, beautiful leaf emerges. In the summer, the dark green foliage contrasts with the huge, long-lasting clusters of creamy white or pink blooms. Many cultivars mature to a medium pink or deep rose color over time. With its rich, deep burgundy/purple foliage that lasts all winter, the oakleaf hydrangea really shines in the fall. Additional interest is provided by the dried tan or light brown flower heads. The flaking tan bark adds a tactile aspect to the white environment in the winter.
An Illustrated Encyclopedia of Hardy Trees and Shrubs by Dirr (Dirr, Michael A., 1997)
“Selection, Pruning, and Care of Hydrangea,” (ext.vt.edu/chesapeake/programs/anr/Pruning) Virginia Cooperative Extension Publication
“Problem-Free Shrubs for Virginia Landscapes,” according to the author. 450-236 (ext.vt.edu/450/450-236/) is a Virginia Cooperative Extension publication.
HORT-84P (ext.vt.edu/HORT/HORT-84/), “Selecting Plants for Virginia Landscapes: Showy Flowering Shrubs,” Virginia Cooperative Extension Publication HORT-84P (ext.vt.edu/HORT/HORT-84/), “Selecting Plants for Virginia Landscapes: Showy Flowering Shrubs,” Virginia Cooperative Extension Publication HORT-84P (
Hydrangea quercifolia, University of Connecticut College of Agriculture, Health and Natural Resources Plant Database (hort.uconn.edu)
Cooperative Extension of North Carolina State University (plants.ces.ncsu.edu/plants/all/hydrangea-spp)
Hydrangea Production at Tennessee State University (tnstate.edu/faculty/ablalock/documents/Hydrangea)
What month should you prune hydrangeas?
Which group the plant belongs to determines the timing and degree of pruning:
- As the days become shorter and the temperatures cool in the late summer and fall, buds for next year’s blooms form.
- By cutting out dead, diseased, or broken branches, a simple trimming is usually all that is required to preserve shape, size, and a healthy plant. Pruning that is too harsh should be avoided.
- Trimming should begin as soon as flowering has stopped in the summer, but no later than August 1. Pruning in the fall, winter, or spring may result in the removal of new buds.
- When the leaves emerge in the spring, tip-pruning the branches encourages several, smaller flower heads rather than fewer, larger flower heads.
Why are my oak leaf hydrangeas not blooming?
Oakleaf hydrangeas (Hydrangea quercifolia) are prized for their huge clusters of flowers and oak-like leaves. They are endemic to the southeastern United States. These plants are hardy in USDA plant hardiness zones 5 through 9, but they grow slowly and may not blossom the first season. When properly cared for, they bloom quite predictably once established. Inadequate water or poor trimming procedures are the most common causes of a lack of blooms. Both can be easily corrected.
Divide an 8- to 12-inch segment of stems and roots from the main bush using a sharp garden spade. To cleanly sever the roots, dig the spade into the root mass. A dirt shovel should be pushed into the soil slightly beyond the margin of the separated clump’s root mass. With the shovel, lift the divided clump and set it on a piece of plastic sheeting. To keep the roots and soil intact, pull the plastic sheets up around the root mass. If the clump can’t be replanted right away, pot it up in a container and keep it wet.
How do you prepare oakleaf hydrangeas for winter?
The most basic way is to pile shredded leaves or bark mulch around the base of the plant to a depth of about 12 inches. Place the mulch mound in place when the ground freezes in late fall, and then expose the plants in the spring when temperatures begin to rise above freezing.
Do oakleaf hydrangeas bloom on old wood?
Some hydrangeas, like Limelight green hydrangea, bloom every year on new wood. Oakleaf hydrangeas, on the other hand, bloom on old wood from the previous year.
Before you enjoy the blooms, the buds that will become beautiful oakleaf flowers form on stems in the summer. Always prune oakleaf hydrangeas as soon as they complete flowering to prevent the formation of next year’s buds. If you wait too long, you can lose all of the bloom buds you’re hoping for.
An oakleaf hydrangea may provide beauty to your house and landscape every month of the year, whether you grow in a little space or have plenty of room. Pennington is here to help you take your landscape and garden to new heights all year long with timely advice and superior lawn and garden products.
When should rhododendrons be pruned?
The best time to prune rhododendrons, according to most expert landscapers, is late winter, when the plant is dormant. Any period between the first frost in the fall and the last frost in the spring (when the sap is low) will suffice.
One of the worst times to trim rhododendrons is right after its rich spring bloom, when new foliage is still hardening off. Blooming will most likely be hampered as a result of this.
Cut back these shrubs in late winter before new growth begins
Shrubs that flower on young wood bloom 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 they bloom. If you avoid trimming when the flower buds are opening, these shrubs will forgive you if you don’t prune at a specific time.
1. Cut the blooms all the way back to get bigger flowers.
These shrubs can be pruned all the way back to the ground in late winter or early spring. Smooth hydrangeas will produce much larger flowers if cut severely every year like this, but many gardeners prefer smaller blooms on stronger branches.
2. To reduce flopping, leave an old growth framework.
The weight of the blossoms on certain hydrangea branches causes them to tumble over, especially after overhead irrigation or a strong storm. Cutting the stems to a height of 18 to 24 inches to offer a robust framework to support new growth is one approach to reduce this flopping.
The University of Arkansas Cooperative Extension Service’s horticulture specialist is Janet Carson.
What happens if you cut hydrangeas down to the ground?
The oakleaf hydrangea blooms in whites and creams with cone-shaped flowers. Its leaves are deeply cut and resemble those of an oak tree. It’s a hardy shrub that thrives in both full sun and full shade.
H. quercifolia blooms on old wood, or growth from the previous season. Unless it is injured or overgrown, it does not require pruning. Remove the dead flower heads slightly beneath the bloom if you want to clean it up.
Remove a few of the oldest, thickest stems all the way to the ground if your oakleaf hydrangea is really old and woody. However, because it blooms on old wood, cutting the entire plant to the ground will result in the loss of an entire season’s worth of blossoms.