The extravagant, vivid blossoms of hydrangea shrubs stand out against the background of lush, green foliage. Therefore, when something is off with the leaves, it is more than a little noticeable.
Curling leaves might be foreboding, but why such a drastic change in their outward appearance?
Hydrangea leaves can curl for a variety of reasons, including over- or under-watering, dry soil conditions, harsh weather, nutrient deficiencies, insect and fungal damage, and dry soil conditions. Each of them results in weakening plant tissue and cell death, which causes curled, twisted leaves.
Leaf curl can affect the entire leaf or just a small portion of it, and it frequently comes with accompanying symptoms like discoloration and texture changes.
We’ve provided a list of the typical causes, solutions, and prevention advice to assist you in troubleshooting them.
How should hydrangea leaf curl be handled?
There are a few causes for the curling of hydrangea leaves.
Consider which of these threats is most likely to affect your plant, but since fungus isn’t one of them, you can cease using any fungicides. 1. The most frequent cause is a sucking insect feeding under the leaves when the foliage is young, like aphids or lacebugs. Early on in the leaf’s existence, this causes damage to the cells, resulting in deformed leaves as they unfold. If you notice little insects on the underside of leaves, spray insecticidal soap underneath the vegetation. Herbicide harm is 2. What you’re witnessing may be caused by the application of a herbicide, such as weed killer, around the plant or on the lawn surrounding the plant. Don’t use weed killers on lawns and gardens. Both broad-leaf weed killers and pre-emergent chemicals fall under this category. To remove them from the soil around hydrangeas, deeply water the area. 3. A virus is possible but unlikely. Usually, in addition to the curling, a virus will cause the foliage to yellow. Viruses have no known treatment, but as we have shown, they are the least likely source.
Why are the leaves on my hydrangeas curling and turning brown?
- Drought, excessive wind, and too much sun can cause the leaves and blooms of hydrangeas to turn brown. The best conditions for hydrangea growth are protection from wind, wet soil, and dappled sunlight. The hydrangea blooms and leaves wilt and become brown because there is insufficient moisture around the roots.
- When hydrangeas are planted in small pots, the leaves and blossoms become brown because the roots can’t properly absorb moisture from the soil in the smaller pots. Because of their large root systems, hydrangeas need constant watering to keep their leaves and petals from turning brown.
- The hydrangea’s leaf edges get brown and crispy when fertilizer is applied excessively or too frequently. Applying a delayed release fertilizer at the beginning of spring will help prevent the bronzing of the leaf margins since hydrangea roots are extremely sensitive to excess fertilizer.
- The flower buds and newly developing foliage development of hydrangeas can become dark and mushy in the Spring due to a late frost. The young growth is delicate and more susceptible to damage from frost. Cut back any hydrangea flower buds that are brown and mushy because they won’t bloom.
- Hydrangea leaf spot fungus, which results in brown patches on the leaves, is typically brought on by overwatering. A hydrangea with dark spots and fewer flowers has too much moisture on its leaves, which encourages the growth of a fungus.
How can I tell if I’ve overwatered my hydrangeas?
The leaves of an overwatered hydrangea may discolor and possibly drop off too soon. Additionally, it will produce fewer and irregularly shaped buds and blooms. Additionally, a hydrangea will develop discolored, withered leaves under extreme overwatering situations.
How frequently do I need to water a hydrangea?
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 fertilizer according to the type of hydrangeas you have. Every variety has varied requirements and will profit from applying fertilizer 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 fertilizer applications.
- Two applications in April and June work best for oakleaf and panicle hydrangeas.
- The only time smooth hydrangea plants require fertilizing 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 defense is to properly care for hydrangeas.
What is wrong with the leaves on my hydrangeas?
Most members of this plant family, including hydrangeas, are susceptible to the fungus Cercospora, which causes leaf spotting. From July to fall, it is typical. The fungus lives in the soil and is transferred to the plant by rain or overhead irrigation. Usually, plants become infected a month or two before leaf spots show up.
Why is my hydrangea withering away?
- Shield young hydrangeas from the sun.
- every three days, water.
- To retain moisture, mulch the area around the plant with compost, leaf mold, or well-rotted manure.
It’s crucial to shield newly planted hydrangeas from harsh sunlight for them to thrive.
At this time of planting, some sunlight is helpful for promoting blossoms, but it is likely to make the soil and leaves dry up and droop.
For around three weeks, provide temporary shade for newly planted hydrangeas as they establish themselves.
The hydrangea may have been cultivated under extremely particular conditions in a temperature-controlled greenhouse, so it may take some time for it to become used to the garden soil and stop drooping leaves.
To keep the soil moist and protect it from direct sunshine, always give the soil a good soak and apply mulch to the top of the soil around the hydrangea.
Water as often as necessary—typically three times a week—to keep the soil moist, but watch out that the soil doesn’t get soggy since this could lead to other issues like root rot.
As long as the soil is moist and you have shielded the plant from the sun, depending on how dehydrated your hydrangea is, the leaves may recover in the cooler evening or it may take a few days.
Key Takeaways:
- Lack of moisture in the soil is the cause of hydrangeas wilting. For hydrangeas to stay healthy and keep their leaves and blossoms from drooping, they need wet soil and some shade.
- Additional effects of high nitrogen fertilizer include drooping flower heads and leaves. Reduce fertilizer application to let the hydrangea to recuperate.
- As a result of transplant shock, hydrangeas that have just been planted droop. To prevent newly planted hydrangeas from seeming withering, give them shade, water them frequently, and add mulch.
Should I remove my hydrangea’s dark leaves?
A leaf-spot fungus may possibly be the cause of any black spots that are appearing on your hydrangea leaves. These often appear under rainy conditions, but they can also appear following excessive irrigation. Although the fungus has ugly patches, it doesn’t harm the plant or spread to neighboring plants. Adjust your irrigation to keep water off the leaves and remove the most ugly ones.
Anthracnose, a much worse problem that can really kill the shrub, may be the cause of leaves with brown or yellowish patches. Pay close attention to the stems and branches for cankers. Their appearance verifies the anthracnose infection on your hydrangea. However, keep calm. As you go, disinfect your pruners with a solution of bleach and water, and remove any diseased or dead plant parts. Mulch should also be removed and disposed of since it may contain fungus spores. Finally, employ a fungicide created especially for anthracnose.
Do I need to remove the burned hydrangea leaves?
It’s best to wait occasionally. Waiting before pruning plants is advised since it encourages new growth from lower down on the stem.
Fresh, young growth is brittle and prone to being burned or even killed by extreme heat and a lack of water.
Even without pruning, plants will continue to grow as they attempt to recover.
Burnt leaves on trees and shrubs will be removed over the next weeks. It will appear like fall has already arrived.
Shrubs, annuals, and vegetables can all be removed fully if they are absolutely dead.
Remove a plant, and then spread a layer of organic mulch over the bare spot that is left. Replanting can be done in the fall when it will be colder and the days will be shorter.
Do hydrangeas like shade or the sun?
With the ideal balance of morning sun and afternoon shade, hydrangeas flourish. Even the sun-loving Hydrangea paniculata will thrive in some shade. Some hydrangea cultivars may survive complete shadow, though.
The oakleaf hydrangea, also known as hydrangea quercifolia, is a substantial species of hydrangea that may reach heights of up to eight feet. In a shade garden, this big bush makes a beautiful backdrop. The height will provide excellent midsummer seclusion. Oakleaf hydrangeas are summer bloomers with mostly white blooms, elegant oakleaf-shaped leaves, and lovely peeling bark.
Hydrangea anomala ssp. petiolaris is another choice for full shade. This climbing species, which has lacy, white blossoms in the summer, can reach a height of 50 feet if it is given adequate support. The foliage is a rich shade of green and would look wonderful growing up a tree trunk or covering the face of a building. It would also look lovely covering the roof of a garden shed.
Full shade cultivars require the same upkeep as partial shade. In the deeper shade, it will be especially crucial to keep the plants free of leaf litter and with excellent airflow. Water your plant once a week after it has become established. Keep a watch on the leaves, and if you notice any drooping, especially during the hot summer months, water them right away. The importance of this increases in hotter regions.
These leaves’ unique shape would be a lovely complement to Hosta leaves. The white blossoms would contrast nicely with the lighter hues of your shady blooms and provide some brilliant brightness to your shaded locations.
Shade Varieties
There are a few different hydrangea cultivars that thrive in the shade. Some types can even thrive in zones 3 (which doesn’t warm up until later in the spring), which is one of the coldest growing regions. Let’s examine some of the best shade selections!
Hydrangea quercifolia ‘Snow queen’
The movie “Snow queen” is stunning. The flowers are stunning, as they are with all hydrangeas. These rose blush-colored blossoms appear in the middle of summer. The foliage of this plant is my favorite component. The leaves begin the season in a very deep green, gradually changing to a deep reddish bronze color, and finally finishing in that shade, offering a stunning splash of color to your fall landscape.
Hydrangea quercifolia ‘Alice’
With a height ranging between 12 and 15 feet, this Oakleaf Hydrangea is one among the biggest. In the summer, this plant blooms with incredibly deep cream-colored flowers. A woodland garden would be a truly lovely place for “Alice.” This cultivar would look especially beautiful if it were grown as a bordering hedge.
Hydrangea arborescens ‘Annabelle’
‘Annabelle’ enjoys partial shade and has some of the largest flowers in the hydrangea family (12 inches wide!). These enormous blossoms can be supported all season long by the sturdy stalks. This shrub can grow up to five feet tall and five feet broad, so give it plenty of area to expand. These enormous, all-white blossoms bloom for a long time.
In a mass planting, as a specimen shrub, or as a foundation planting, “Annabelle” would look lovely. These bushes should still be included in your cutting garden. Imagine a bunch of flowers that large! Wow!
What symptoms indicate overwatering?
To keep your plants healthy, watch out for these five signs of overwatering:
1. If a plant is overwatered, it will probably produce limp, droopy leaves that are yellow or brown rather than dry, crispy leaves (which are a sign of too little water). Wilting leaves and soggy ground typically indicate that root rot has taken hold and the roots are unable to absorb water.
2. You’ve probably overwatered if your plant is losing both old and new leaves at the same time. Bear in mind that the leaves that are falling off can be green, brown, or yellow.
3. You’ve overwatered the plant if the base of the stem starts to feel mushy or unsteady. Even a foul odor may start to come from the earth.
4. An overwatering-related bacterial infection appears as brown spots or margins around the leaves that are surrounded by a yellow halo.
5. If you have repeatedly overwatered your plants, fungus or mold may develop directly on top of the soil, similar to symptom number three. Fungus gnats are another typical indicator of overwatering.
Is the sunlight too much for my hydrangea?
Depending on where you reside, too much sun may diminish the beauty of your hydrangea shrubs. Too much sun can cause flower petals to fall off, burn leaves, and cause withering. Giving your hydrangeas a little more water might keep them from withering if they are situated in an area where they will receive afternoon sunshine directly. Keep your hydrangeas’ soil moist, but don’t water them excessively. If your plant receives too much water, it may develop root rot or develop powdery mildew on its leaves and petals.
Can you grow hydrangeas with Miracle Grow?
In the North, hydrangeas can grow in all-day sun. Add Miracle-Gro Garden Soil for Trees and Shrubs (in-ground) or Miracle-Gro Moisture Control Potting Mix to the soil to improve soil nutrition and drainage (containers).