To help Hydrangeas thrive, give plants a deep soak 1-3 times a week rather than giving them little sips of water daily. Hydrangeas do not tolerate overwatering or drought well. Their leaves wilt in the heat of midday, making it difficult to tell by appearance whether they need additional water or not.
Deep weekly watering is usually enough (if you don't get enough rain). Although you may need to water more often in hot, dry weather. Water hydrangeas deeply and regularly in the first growing season to encourage an extensive root system.
"Morning irrigation of any type hydrates the plant to face the day," says Mitchell. If you don't follow our above advice and continue watering your hydrangeas overhead (tsk, tsk), watering in the early morning will also allow the leaves to dry before the heat of the day.
Potted hydrangeas overwinter best in a garage or basement where the temperature stays cool but doesn't freeze. The plants will go dormant, but you'll still need to water the pots occasionally, about once a month, to keep the roots moist, until spring.
If the leaves are drooping, it is time to water the plant. If the leaves are yellowing and turning brown, check for standing water or a clogged drainage hole.
You might be able to revive less-wilted blooms in just an hour or two, so check on them a few times while they soak to see if they're back to looking their best. If you notice they still look wilted after a few hours, leave them to soak overnight to see if that does the trick.
For hydrangeas planted in ground.
For optimal growth, bloom production, and quality, fertilize three times: In early spring when plants are just leafing out. In early May to boost their flower production for summer. In late June/early July to help your plants finish the summer strong.
The goal is to have them last about two to three weeks! If they start to droop after a few days, cut the stem again and change the old water out to hot water once or twice a week. You can also mist the blooms daily – hydrangeas are one of the very few flowers that can actually drink water from their blooms!
Too much sun exposure can cause your hydrangea shrubs to burn on its leaves and blooms. Also, be sure to put your fingers in the soil to see if it needs watering. We do recommend a soak versus light watering each day, but you should be sure that the soil is always moist – not wet – by sticking your fingers in the dirt.
Most common hydrangeas prefer a partial sun location - ideally receiving sun in the morning hours and shade in the afternoon. The reblooming Endless Summer® Hydrangea series prefers part shade. These include BloomStruck®, Endless Summer®, Blushing Bride®, and Twist-n-Shout®.
When a hydrangea is cut, displayed in a vase, and looking quite lifeless, turn the flower upside down and completely submerge its head into a bowl of water overnight. “Hydrangeas are one of the only flowers that actually absorb water through the petal,” the florist said in the video.
Supply the Right Amount of Water
Along with planting them in the right place, properly watering your hydrangeas is essential to bigger and better blooms. "Hydrangeas should be watered deeply several times per week to encourage deep root growth," says Enfield.
Roots need oxygen to thrive, and if they are sitting in water for too long, they may begin to rot or die. The best way to prevent root rot from forming is to plant your hydrangea in well-draining soil to reduce the chances of fungal development.
There are plenty of reasons why your hydrangeas may not be blooming as much as they once did. Conditions like extreme heat, drought, or excessive sun exposure can all impact how many flowers your shrubs produce. Pruning is also an important consideration.
To grow hydrangeas in planting beds, focus on improving the native soil. One simple way to do that is to combine equal parts existing soil and Miracle-Gro® Garden Soil for Trees and Shrubs.
Some gardeners report success in turning their hydrangeas blue by applying coffee grounds to the soil. The coffee grounds make the soil more acidic, allowing the hydrangea to more easily absorb aluminum. In addition, fruit peels, lawn clippings, peat moss and pine needles, are thought to have a similar effect.
Hydrangeas grow best if they are fertilized once or twice in the summer. Although some authorities recommend special fertilizer mixes to get the maximum results, hydrangeas do amazingly well with a more relaxed approach. Either chemical fertilizers or organic matter can be used successfully.
Water them for longer.
"Keep in mind that light surface watering may help the foliage bounce back, but if the plant has experienced significant shock, deep soaks will help the root system rebuild and regain strength," she explains. "Watering them three to four times per week for a full five to 10 minutes is ideal."
It is suggested that Hydrangea wilt so soon after being cut because their stems contain a sticky substance that clogs the stems preventing moisture reaching the top of the stem to the head. Top Tip - Cut 10 cm off the stem and place in boiling water and leave for 24 hours.
EMERGENCY RESCUE FOR WILTING HYDRANGEAS
Then recut and place the stems into boiling water and then back into a vase of fresh water. They should revive in a couple of hours and live another day or two.
To determine this, we have to go back to the basics of geometry to measure area and volume. However, a few measurements will always remain the same. Therefore, an “inch of water” is 0.62 gallons per square foot of garden area.
Brown, tan, yellowish or black spots on hydrangea leaves may be anthracnose. You can also identify it by cankers that form on stems and branches. Anthracnose can be fatal to hydrangeas, so prune out dead or diseased plant parts and destroy them.
Plant is wilted. Leaves may be folded or rolled. Soil is dry to the touch an inch or more into the ground.