“In a shady area, I have an oakleaf hydrangea that is seven years old. My hydrangea produces a lot of strong foliage, which I must frequently clip, but it does not flower. It only produced one or two blooms. What makes you believe that is? William Stovall queries.
When pruning this and other hydrangeas, timing is everything. The year before they blossom, oakleaf hydrangeas start to generate flower buds. Reduce pruning as much as possible to enhance the blooming show. Each year, just the broken and errant branches should be removed. This encourages the plant to blossom while assisting in controlling its size. Heavy pruning promotes growth, making the plant larger and necessitating further pruning. More stems with healthy flower buds are left over after selective pruning, resulting in a better bloom the following year.
Prune Like a Pro: Before making any cuts, consider the shape of the plant and use only clean, sharp equipment. By just removing a fourth to a third of the canopy each year, you can avoid overpruning.
Why isn’t my oakleaf hydrangea blooming?
Native to the Southeast of the United States, oakleaf hydrangeas (Hydrangea quercifolia) are prized for their voluminous flower clusters and oak-like leaves. These plants are tolerant of USDA plant hardiness zones 5 through 9, but they develop slowly and may not blossom the first year. But with the right care, they bloom fairly predictably once they’re established. A paucity of blooms is typically the result of poor pruning techniques or insufficient watering. Both issues are easily fixable.
Before planting oakleaf hydrangea, work 2 to 4 inches of compost, moistened peat moss, or manure into the soil to a depth of 8 inches. These modifications enhance drainage and increase nutrients, which may encourage wholesome growth and blooms.
A soil test kit, available at nurseries and garden centers, can be used to determine the pH of the soil in your garden. The pH range between 5.5 and 6.5 is ideal for oakleaf hydrangea growth. To make the soil acidic, add sulfur, peat moss, sawdust, or dry leaves. Dig dolomitic lime into the soil to increase the pH.
Particularly in warmer areas, put oakleaf hydrangea in partial shade; the plant won’t thrive in dry, sunny settings and its blossoms may appear faded or burned. In complete shade, the plant could not flower.
To keep the soil equally moist but not soggy, water newly planted hydrangeas every other day or as necessary. In dry conditions, water established hydrangeas more frequently than once per week. Insert your finger into the ground. One inch beneath the surface should feel damp.
Early in the spring, fertilize oakleaf hydrangeas by applying 0.5 ounces of 10-10-10 fertilizer per 10 feet of soil. A surplus of fertilizer promotes lush, green growth rather than floral growth.
Oakleaf hydrangea should be pruned right away after blooming. If you prune an oakleaf hydrangea in the winter or spring, you’ll remove the flower buds and stop the plant from blooming for the season. Oakleaf hydrangeas bloom on old wood.
What is the duration of an oak leaf hydrangea’s bloom?
All around our land, we have grown oakleaf hydrangeas in both bright and shaded areas. It seems to operate best in the morning sun with afternoon shade. The oakleaf has the advantage of thriving in more drier environments than its cousin hydrangeas. While oakleaf hydrangeas grow with relatively little care, the rounded, vivid mopheads suffer in our sandy soil and frequently wilt on hot days.
Because of rumors that the leaves resemble some oak foliage, Hydrangea quercifolia is often known as oakleaf hydrangea. They certainly look lovely in the fall when they change dramatically from red and orange to burgundy. It is a deciduous shrub that can reach a height of 4 to 6 feet and is upright and very full. It works well as a highly striking specimen plant, a sunny border, or a forest garden that receives some shade.
It is native to the United Regions and is frequently seen in the deep south and neighboring coastal states. On one of his numerous botanical expeditions south in the middle of the eighteenth century, botanist William Bartram is reported to have recorded this species. One of just two native hydrangeas exists. It is quite hardy here in South Jersey and blooms best in regions with moderately warmer summers.
Like other plants, it thrives when planted in good soil, mulched, and watered as needed. The soil needs to be well-drained even if it likes wetness since it cannot endure a stagnant, muddy environment. The ones we have on our property are in our sandy loam, in part shade, and are covered in leaf mulch from our enormous trees every fall, despite the fact that it is believed to flourish in damp soils. They definitely value a summer mulch because it keeps the soil moist. Feed in the spring once a year.
Since they blossom on old wood, if you must prune one back, do it right away to give new growth enough time to develop and bear buds for the following year.
Sally Castellini, owner of Pink Dahlia Vintage Floral Designs in Milliville and a vendor at the Collingswood Farmers Market, discusses how succulent plant terrariums have grown in popularity as wedding décor and walks viewers through how to set one up.
They are adored for its sizable white flower pyramidal bunches. I particularly appreciate picking the big blooms and putting a few in a big vase so I can enjoy them for a long period. They can be harvested and preserved later in the season to enjoy all winter long in a vase or on a wreath when they are almost completely dry on the plant. On mature oakleaf hydrangeas, the bark occasionally peels away to reveal a rich brown covering that looks lovely in the winter.
They are extremely colorful for around nine months out of the year and hardy from zone 5 to zone 9. Despite starting out green, they produce vibrant foliage in the fall. The blossoms start off white in mid-June and gradually turn pink and pastel mauve until drying in the fall.
For extended summer flowers, there are several really attractive hydrangeas that can be planted. Knockout roses, butterfly bushes, Weigela, clethra, kerria, bottlebrush buckeye, and abelia are a few examples of companion plants for mid- to late-summer blooming.
Look into these if you’d want a few plants that bloom continuously throughout the season. The task of planting for continual bloom is definitely worth the effort. An oakleaf hydrangea can be a wonderful place to start because it will bloom from now until the end of the season.
How can I induce my oakleaf hydrangea to produce more flowers?
Growing oakleaf hydrangeas shouldn’t be challenging if your hydrangea was planted properly. Once established, these natural shrubs are drought tolerant and nearly disease and pest-free.
According to literature about oakleaf hydrangeas, the plants can reach a height of 10 feet (3 meters) and a spread of 8 feet (2 meters). If you haven’t given the hydrangeas enough room to grow to their full size, you may need to start pruning them to keep them small enough for the area.
Oakleaf hydrangeas can benefit from pruning in order to grow into a full shrub. If this is what you want, pinch back new growth or otherwise reduce older growth. Don’t prune these shrubs until they are in bloom since they blossom on the growth from the previous year. As a result, they have more time to develop new buds that will blossom the next summer.
What kind of fertilizer works best for oakleaf hydrangeas?
Oakleaf hydrangeas are low-maintenance plants that only require the following necessities:
- Location and daylight Oakleaf hydrangeas thrive in full sun to light shade in northern regions. Give them locations with morning sunlight and shade from the harsh afternoon sun in southern climates.
- A rich, well-drained, somewhat acidic soil is ideal for growing oakleaf. When planting, spend time amending the soil in clay-heavy locations. Pennington Quick Reaction Gypsum helps remove compacted soil, enhances water penetration and drainage, and promotes healthy root development. Additionally, Pennington UltraGreen Plant Starter with Vitamin B1 aids in lowering transplant shock.
- Water
- Oakleaf hydrangeas thrive naturally in soil that is consistently damp but never drenched. Water thoroughly, then before adding more water, manually inspect the soil. Avoid overwatering to stop root rot. Wait a few days before making another check if the soil is damp.
- Fertilizer
- Your hydrangeas will start out with the vital nutrients they require when you fertilize them at planting time with a complete fertilizer like Pennington UltraGreen All Purpose Plant Food 10-10-10. Every year, in the first few weeks of spring, feed your oakleaf with the same fertilizer or a fertilizer that promotes flowers, like Pennington UltraGreen Color Blooms & Bulbs Plant Food 15-10-10. then refeed it in the middle of the summer, four months later.
Many customers ask why their hydrangeas aren’t blooming. The primary reasons hydrangeas don’t bloom are incorrect pruning, bud damage due to winter and/or early spring weather, location and too much fertilizer.
There are hydrangea kinds that bloom on either fresh or old wood, or even both. Both new and old wood are the growth of the following year (spring), respectively.
- Consider that this year, you bought a Nikko Blue Hydrangea. For the next year, Nikko’s produce blooms in the fall. Your Nikko is therefore creating blooms this fall that will blossom in the spring.
- Therefore, you wouldn’t want to completely prune your Nikko Blue Hydrangea this fall while you are pruning your perennials. Pruning the Nikko Blue Hydrangea this fall would effectively mean cutting off your hydrangea flowers for the upcoming spring.
- The idea behind Endless Summer, a hydrangea variety that blooms on both old and new wood, is that the plant will set blooms this fall to blossom not only in the spring of the following year, but will also keep producing blooms in the spring of the following year to extend the blossoms into the summer.
- Once more, pruning your Endless Summer hydrangea in the fall would mean removing some of the flowers that would blossom in the spring.
The hydrangea’s plant tag will indicate whether it blooms on fresh wood, old wood, or both. It is typically preferable to wait until spring to prune your hydrangeas. As the plant grows, you’ll see stems that are fragile when bent and lack any leaves. Since these stems are dead and won’t produce any flowers, they should be clipped close to the plant’s base.
The second reason why your hydrangeas aren’t blooming is probably the weather. Buds of hydrangeas are extremely susceptible to cold. Therefore, it is a good idea to wrap your hydrangea for the winter if it is an old wood hydrangea. Keep in mind that old wood hydrangeas establish their blooms for the following spring in the fall. Therefore, you won’t have blossoms in the spring if the fall-produced buds are frozen in the winter.
You can wrap anything with regular burlap. Burlap should be wrapped around the plant and filled with mulch or leaves after the first hard frost and after the hydrangea’s leaves have dropped. In order for the buds to survive the winter and sprout the following spring, the plant receives insulation from this. Never wrap your hydrangeas in plastic. When warmer winter days arrive, the plant cannot breathe since plastic, unlike burlap, doesn’t breathe. As a result, the plant can heated to such high temperatures that it cooks within the plastic and perishes.
The second most frequent weather-related cause hydrangeas do not blossom is late spring killing frosts. We saw really chilly temperatures in April both this year and last year after beautiful spring days. When springtime temperatures drop below freezing, hydrangeas need to be covered with an old beach towel or sheet. Because of the temperature dip, there won’t be any blossoms.
The majority of hydrangeas require at least 3 to 4 hours of light per day to bloom. The best light is in the early morning, midday light is acceptable if it is dabbled light rather than beating sun, and afternoon sun is typically too hot. Check the plant label, though. Newer hydrangea cultivars are being created that can withstand more sun exposure time and sun intensity. A hydrangea in full sun will require much more watering than one in diffused light, so keep that in mind.
High nitrogen fertilizer should not be used to feed hydrangeas. Nitrogen is indicated by the first number on the fertilizer ratio. (The ratio stands for N, P, and K) For healthy leaves and general good growth, some nitrogen (N) is required; however, a ratio of 8-16-6 or any similar combination with a higher middle or phosphorus (P) value is preferred. The growth of roots and shoots is encouraged by phosphorus, which improves the blooming process.
Potash (K), the third element’s last quantity and the lowest ratio, is for plant hardiness. Because hydrangeas prefer acidic soil, they can be fertilized with fertilizers designed for such plants. Hydrangeas only require fertilizing twice a year, once in early spring and once in mid-summer. To avoid root burn, make sure the soil is always moist before applying a fertilizer.
The reason why my hydrangea has never flowered.
All varieties of hydrangeas like regular soil moisture and a good deal of moisture. Your plants might not bloom if yours constantly dries out.
In a hot and dry area, bigleaf species plants could require watering every other day.
If you aren’t getting enough rain to meet the two inches of water per week that these plants require, you’ll need to supply additional irrigation.
You can use a rain gauge to determine how much moisture Mother Nature is providing your plants with so that you can provide the extra.
Though less erratic, other species should still be monitored to make sure they have access to enough water.
The leaves will begin to droop and wilt if they aren’t getting enough water, especially during the hottest part of the day.