Because the hydrangea is losing more water from the leaves than it can store at the roots, the foliage and blooms of hydrangeas turn brown. As an indication of stress, hydrangea leaves and blooms turn brown and wilt if the soil around the roots is not continuously moist.
Even when the soil is moist around the roots, excessive wind also removes so much moisture from the enormous surface area of the leaves. Because the roots are unable to quickly draw up and replace the water lost from the leaves, the hydrangea leaves and flowers may still turn brown and curl.
Your hydrangea’s leaves may turn brown and wilt if it is in dry, sandy, or stony soil because water drains too quickly for the roots to draw up the moisture it needs.
Hydrangeas should be watered (with a thorough watering) as often as necessary so that the soil is moist. However, there is no universally specified guidance for watering hydrangeas because it depends on climate, weather, and factors like the maturity of the hydrangea plant.
You might need to water your hydrangea almost daily during the hottest months of the year (especially if it is in a pot).
It is necessary to recreate the conditions of the hydrangea’s native environment in order to revive hydrangeas with brown leaves and flowers. To do this, plant hydrangeas in soil that retains moisture, water them as often as necessary to keep the soil moist, and protect them from wind, which depletes moisture.
- The best place to plant or transplant hydrangeas is in soil that has been supplemented with organic matter (compost, leaf mould, or well-rotted manure) to a depth of 18 inches, which is deep enough to accommodate the hydrangea’s root system once it is grown. This makes hydrangeas more drought-resistant and lessens the possibility of browning foliage and blossoms.
- Since hydrangea roots are broad, it is crucial to thoroughly water the area around your plant if replanting is not an option. Ideally, use a hose to ensure that the soil is evenly moist to a good depth.
- Always soak the hydrangea deeply since this promotes the roots to expand deeper into the soil to obtain the moisture, increasing its drought resilience. A hydrangea’s roots become fragile in the summer and are more likely to turn brown if they receive too little water, which causes them to grow close to the surface.
- Mulch (compost, leaf mould, or well-rotted manure) should be applied to the soil’s surface surrounding your hydrangea in a 2 inch depth. The mulch aids in maintaining the soil’s moisture to achieve the ideal moisture balance.
- Make sure your hydrangea is not in the path of the wind since it dehydrates the leaves and turns the blossoms brown. Planting hydrangea under a tree is a good way to increase shelter and create the ideal environment because hydrangea naturally grow in woodlands. The hydrangea can be moved to a more protected section of the garden or additional cover can be created with other plants to block the wind.
Anytime of year, you can use pruners to trim back any brown leaves and blooms, or you can just wait for them to fall naturally.
The growth from which the blooms are exhibited can be removed by excessive trimming, so it is necessary to stress that mild pruning is preferable.
I should also stress the value of routine watering and the use of mulch.
In order to replicate the moisture-retentive soils to which hydrangeas are suited, a coating of leaf mould or compost can really help. Hydrangeas naturally have a mulch of fallen leaves on the wood land floor every year that helps conserve moisture.
The leaves should stay green once the hydrangea has established in its ideal environment, but the flowers typically do not return, so you might have to wait until the following year before they blossom.
How can a burned hydrangea be revived?
A hydrangea’s roots can be burned if too much fertiliser is used, which will likely result in the plant dying, turning brown, and drooping.
As such, hydrangeas are not heavy feeders and do not require annual feeding in the same manner as roses do, and doing so can actually be detrimental.
Hydrangeas frequently develop and flower to their full potential if they are planted in healthy soil or the soil has been modified with compost prior to planting.
The hydrangea should flourish if a 1-inch-thick layer of mulch is applied around it to assist retain moisture and supply nutrients to the soil (compost and leaf mould are ideal options).
Only in the following circumstances should fertiliser be used:
- Planting the hydrangea in sandy soil (which is nutrient poor).
- The hydrangea is in a pot or other container where the roots have used up all the nutrients in the soil.
In these two situations, it is recommended to use an all-purpose fertiliser with equal parts nitrogen, phosphorus, and potassium (NPK) that is applied once in the spring and is generally well-balanced.
The roots of your hydrangea can be burned by well-rotted manure, especially if it is added to the soil after planting. However, if the manure is made from poultry manure, it may contain a lot of nitrogen.
To prevent issues, I advise putting compost to the soil as a soil amendment (fresh manure is particularly harmful, always allow it to rot for a year or so before using manure on your garden).
If your hydrangea is exhibiting indications of stress as a result of being recently planted in soil that has been altered with manure, move it to a location with soil and compost, and it should recover.
Reduce the amount of fertiliser used and remove any discoloured leaves or blossoms. To assist the hydrangea recover, thoroughly water it in an effort to dilute the soil’s water-soluble nitrogen.
Key Takeaways:
- Most frequently, hydrangea deaths are caused by the soil’s lack of moisture. Because they need their soil to be continually moist, hydrangeas will droop or even die in a dry environment.
- Drought, transplant shock, frost damage, and too much sun can all cause hydrangeas to perish.
- If the pot base doesn’t have drainage holes, potted hydrangeas may succumb to root rot. Small containers may dry out too rapidly and limit root expansion.
- Water hydrangeas liberally, cover them with compost mulch, and keep them out of the sun and wind to help them recover. To encourage healthy growth, remove any growth that has been sunburnt or damaged by frost.
Do I need to remove the scorched hydrangea leaves?
During the recent heat wave, we were asked a lot of questions on how to revive stressed plants, and we are more than delighted to assist! To be ready for upcoming temperature extremes, consider the following frequently asked questions and their responses.
How do I help my lawn? I am watering it every day, but it’s still getting fried!
Turf grass has a very shallow root system, and at the temperatures we’ve lately had, water from the soil evaporates quickly. Despite routine watering, your lawn undoubtedly was burnt by the sun. Despite the fact that our Northwest grass blends were not developed to withstand these circumstances, if you continue to water and fertilise it regularly throughout the season, your grass should recover.
My hydrangeas are taking the worst of the heat. Any tips for recovery?
The hydrangeas really had trouble. It was excruciating to see! The majority of the plant damage may have only affected the blooms that withered or turned brown in the heat as long as the plants were kept well-watered. By cutting slightly above the leaf that is beneath the flower bud, remove spent flowers and fertilise. If the foliage on your hydrangeas is also harmed, it can have sunburn (crispy or brown around edges). Your plant will eventually recover from severe sunburn, but it might not from acute drought, depending on the total degree of damage.
My red currant has curling leaves even though it was watered deeply every day during the heat wave.
Red currant bushes prefer some shade or as least shelter from the strong sun, and they will undoubtedly display sunburn as a result of the recent weather. Remove any foliage that is more than 50% damaged and lightly fertilise it to aid in the plant’s recovery. As long as the plant did not become overly dry, the burned leaves will gradually fall off as the plant grows new ones. Spider mites are the next potential problem to keep an eye out for; the heat may have inflated the insect population, and stressed plants may be “sitting ducks for an infestation.” Due to the vulnerability of red currants to mites, keep an eye out for more yellowing or browning leaves as well as webbing on leaves and/or branches. Bring any suspicious leaves in a baggie to the garden centre for diagnosis and possible treatments.
My blueberries got toasted even with daily watering. How do I care for them now?
Particularly when bearing fruit, blueberries’ thin, fibrous root structure is extremely susceptible to drying out. Your plants might not recover if they were only recently planted (less than two years in the ground). Reduce the plants’ energy needs by pruning back the plants to remove some of the top growth and by removing this year’s berry yield. Apply a thin layer of kelp meal as a top dressing, and then mulch the roots with bark, compost, etc. to stop soil from evaporating. Give the plant some time to recover while continuing to water normally. In the event that they don’t appear to be healing, assess this fall and think about planting more blueberries.
My begonias have suffered! Tips to help them recover?
Begonias are challenging in these weather! They can’t survive harsh sunlight either because they are so sensitive to rotting when they absorb too much water. To help the plant recover with less stress if they have been burnt, it is preferable to remove the blossoms and prune back the scorched leaves that appear to be more than 50% damaged. Make sure they are properly hydrated before feeding them, then give them a diluted organic liquid fertiliser. If you can, give them more cover from the sun while it’s at its hottest. Unfortunately, there is not much hope for recovery if you unintentionally overwatered them, and it might be best to replace them.
I watered the heck out of my perennial every day, but it’s still drooping. Will it get better?
The majority of the mature landscaping plants, including the most resilient lavender, were literally melting when we walked outside yesterday during the hottest portion of the day. Even if they are sufficiently hydrated, plants partially welt as a strategy to preserve water and prevent moisture loss from their leaves when exposed to harsh sun. The plants typically require no extra water after the sun has set or once they are in shade to fully recover. The lavender looked completely natural again this morning!
Two thirds of my cucumber plant is now wilted. Can I revive it?
There is still plenty of time in this growing season to replant even if two thirds of the plant is wilted or injured. Cucumbers could still be grown this year if you start your seeds in the ground!
My hibiscus was burnt to a crisp. The stems are okay, though! Is it salvageable?
Your hibiscus appears to be able to heal, but it will likely lose the majority of its damaged leaves, abort any forming flowers, and appear dejected for a while. Trim the worst-looking foliage at this time and give it some fertiliser. Continue routine watering or, if there is less foliage to maintain, perhaps water a little less frequently.
My weigela is in rough shape. It’s in a large pot and gets afternoon sun. A large tree that used to offer some shade was cut down due to ice storm damage, so the sun is relentless. Will it help if I trim off the brown stems and transplant it into the ground?
Your weigela appears to have been severely scorched and dried up. It could be better if planted in the ground, but I bet it can recover in due course. Cut it back by approximately a third now (if it hasn’t opened yet, you won’t get blooms this year), then plant it using these hot season planting methods during a cool time of the day. For the first two weeks following transplanting, provide temporary shade. Water deeply every two days for the first two weeks. Then, start to ease off by 1-2 days between waterings every week.
All new growth on my tomatoes is fried. How should I proceed?
Although we wish for a warm summer so that our tomatoes will mature, continuous temperatures exceeding 95 degrees Fahrenheit have a tendency to prevent fruit set and can even scorch growing tomatoes. On a couple of my tomato plants, especially those that have been in the ground for less than a month, I noted damage and wilting of new growth. Although I had shade fabric covering every tomato cage, the wind had blown it off of one delicate plant, which is now nearly one-third scorched. The warmest period of yesterday’s day left all of my tomato plants very wilted, but just one appears to have received lasting damage to the topmost new growth. I removed the wilted tips from my plants this morning and gave them a mild liquid kelp meal feeding, which raises potassium levels and aids in stress recovery. Your plants will recover after a few weeks if you follow suit!
My Daphne burkwoodii got sunburned leaves. Do I clip them off or let them fall off on their own?
Sunburned leaves will ultimately fall off on their own, but you can enhance the appearance of the plant by removing any leaves that have more than 50% damage. Additionally, you can assist the plant by fertilising it to encourage a burst of new growth.
Some of my newer lupines are wilting away and flowers are getting fried. What can I do?
Your lupine plants appear to have been newly planted this year. Extreme heat and sun may be very stressful on new plantings, and when plants are in flower, the stress can be increased. Make sure not to overwater your ground plants; a thorough soak every few days is preferable to daily misting. A layer of mulch that is at least 2-3 inches thick will aid in retaining soil moisture and minimising evaporation. It might be necessary to trim back the flower stock and a few of the crispy leaves, fertilise sparingly, and give it some time to grow again.
My new trees and perennials are still in nursery pots. Should I wait until fall to plant?
It depends on how many plants you have, how big your project area is, how much sun exposure there is, and what you have planned for the summer. Even if you decide to pot up some of the smaller plants into larger pots to keep them in containers, bear in mind that they will still require daily watering until they are planted. You might decide to start planting right away if your project area is quite modest and you can give temporary shadow protection during intense heat. Follow these hot season planting instructions carefully.
My knockout roses are fried despite watering deeply each morning during the heatwave.
Even if you gave your knockout roses good watering, they probably had never encountered temps like the ones recently and became scorched. Cut back the plant after fertilising it to get rid of any damaged areas. Even if you severely prune it, it should recover and blossom in approximately 6 weeks, growing back better than before. You’ll still have a few months to appreciate the blossoms this year!
Should I water frequently throughout the day or only once or twice during a heatwave?
Depending on the size of the container and the amount of sun exposure, plants in pots may require more frequent watering. The optimum time to water is first thing in the morning so that plants have all their water for the day. It is preferable to give in-ground plants a thorough soaking once every few days as opposed to frequent light watering. To stop moisture evaporation from containers and other crops, mulch them.
Can I rehabilitate severe sunburn on conifers and pines (evergreens)?
Conifers and other evergreens that have been severely burned may need to be removed or replanted because they are difficult to recover from and won’t produce leaves seasonally. Depending on where the scorched region is, some gentle pruning may help remove the unsightly foliage. However, you should take care to avoid cutting into bare branches because many conifers won’t come back from such old wood.
If potted plants look completely dried out and even feel crisp, is there anything to do? I’ve been watering!
Potted plants that are entirely dried out and crispy may have either been overwatered or just gotten fried by the sun’s strength. Plants that have been exposed to the sun can be pruned and fertilised, and they should eventually recover (planting in the ground would be much better!). However, root rot frequently results in death. Keeping plants adequately hydrated while allowing the roots to sufficiently dry out for appropriate function is a tricky balance. Root rot, which eventually causes the plant to wilt or exhibit other signs of stress when the roots collapse and can no longer support growth, can develop in plants that are kept continually moist. It’s preferable to transfer containers to a shaded area or even inside if we experience this kind of intense heat again. If you are unable to move the plants, shelter them with tomato cages covered in shade cloth or plant individual pots with repurposed umbrellas affixed to bamboo stakes for daytime shade.
My nandina got a little scorched. It’s not in terrible shape, just some of its upper leaves turned brown. I thought I would just cut the brown leaves off. Any suggestions?
Just now, the nandina got sunburnt. The worst leaves will eventually fall off and it will heal, but if you’d rather not wait, you can trim them yourself. To aid with new growth, follow up with a mild all-purpose fertiliser.
My fiddle leaf fig got too hot during a power outage! It still has a small amount of leaves.
FLF are drama queens and sensitive to temperature fluctuations. If the plant seems heavy when you pick up the pot, don’t water it; if it feels light, give it a good, deep soak. The next time it needs watering, you can give it some Joyful Dirt fertiliser and lightly spritz the foliage. My blinds and curtains are closed, so my plants have been battling for light. To assist them, I’ve added a few LED grow lights to some of the darkest rooms.
My monstera was accidentally left outside and is burned. What should I do? Is it RIP?
Ouch! Your monstera’s delicate, substantial foliage must have suffered a serious beating! Hopefully, you saw it outside before it was exposed to temperatures of 100 degrees or more and suffered a severe sunburn. That’s about all you can do right now; you’ve probably already given it a nice drink and removed the worst-looking leaves, but there’s always hope with plants. Especially now that you have removed some of the foliage, take care not to overcompensate by watering too much or too frequently. When it’s time to water it again, fertilise it with something tasty like Joyful Dirt, which has nutrients and helpful microorganisms that should help it recover. After a few months, your plant should be able to push out new leaves to swiftly regain its previous splendour, provided the crown did not suffer significant solar damage.