Skip to content

Watering Hydrangeas: How much water do hydrangeas need to thrive and when is vinegar good for them

Hydrangeas are a beautiful addition to any landscape, but how often should you water hydrangeas to help them reach their full potential? That’s what you’ll find out in this article.

How often to water hydrangeas

Newly planted and established hydrangeas

Watering hydrangeas - How often they need water to thrive

Watering newly planted hydrangeas: If you are growing hydrangea, it is important to water them until they are established and then water them regularly, especially during extremely hot weather or drought. They should be planted in well-drained, moisture-retentive soil. They should not be planted in a location where there is standing water, predominantly not after rain. Soil hydrangeas should be watered at least 3 times a week after planting to develop a strong root system. They have shallow roots, so mulch is an absolute must! Use 5-8 inches of hardwood mulch (not the stained red stuff) to retain moisture and add organic matter to the soil.

Watering established hydrangeas: You can also use drip tubes or soaker hoses in the landscape. They help bring water to the roots, which is the most important thing for hydrangeas. Depending on the type of hydrangea, it needs different amounts of water. Hydrangea macrophylla usually needs the most water. Hydrangea arborescens and Hydrangea quercifolia usually require less water.

Here is an example of a hydrangea with drooping leaves that needs immediate watering.

Hydrangea that needs to be watered

Hydrangea that needs watering

3 hours later in the day after it has been watered.

After watering, the hydrangea leaves will sprout again

After watering, the leaves will sprout again and the plant will look much better.

Pot and indoor hydrangeas

Put the hydrangea in a bright window in a cool room


Hydrangea in a pot – how often to water: If you are planting hydrangea outdoors in a pot, a light colored ceramic pot is best to retain moisture. Dark colors absorb heat more quickly. Make sure there is a drainage hole! The hydrangea should be watered thoroughly at least 3 times a week. Always water the plant around the entire pot, not just in one spot. The water should come out the bottom of the pot. Never let the hydrangea stand in water, as this will cause the roots to rot.

Watering indoor hydrangea: The same rules apply to hydrangeas grown indoors. Depending on where you grow them, you may be able to plant out a hydrangea you got for a special occasion like Mother’s Day. Water them the same way, but it’s important that they get more light than if they were outdoors. Place them near a bright window in a cool room for best results. Do not leave them in water. They prefer at least 4 hours of morning sun for the plant to get the best color and bloom. With proper watering, you will have hydrangea that will be the envy of the neighborhood!

Interesting Fact: A little known fact about hydrangeas is that they need a lot of water. In fact, the “hydra” part of their name refers to their seed pods, which look like Greek water vessels.

What do you need if you want to change the color of your hydrangeas? You can find out here !

Watering hydrangeas – What else you should pay attention to.

Watering hydrangea - what you should be sure to do

If you are using a liquid fertilizer and the plant is dry, water at least 4-6 hours before fertilizing to prevent burning the fertilizer. Whenever possible, use a slow-release fertilizer.

  • It is best to always water at the base of the plants to prevent mold or fungus from forming on the leaves.
  • Water deeply and thoroughly 3 times a week when planting a plant.
  • Use a slow release fertilizer if possible.
  • Mulch the plant to retain moisture.
  • When the leaves droop, it is time to water the plant.
  • If the leaves turn yellow and brown, look for standing water or a clogged drainage hole.

How to properly care for hydrangeas, how to fertilize and prune them? You can find out all that here !

Watering hydrangeas with vinegar – how and in what cases.

Watering hydrangeas with vinegar - In what cases is it okay?


Hydrangeas, being acid-loving plants, need a pH of 5.5 or less in their soil. So if your hydrangea are showing signs of chlorosis due to an overly alkaline pH in their soil that prevents them from properly absorbing nutrients, a supply of well-used vinegar will help them recover.

How to use vinegar for hydrangeas? To incorporate vinegar into hydrangeas without harming them, it’s best to mix it directly with irrigation water. Add 1 to 4 tablespoons of vinegar, either white, apple or wine vinegar, per 5 gallons of irrigation water. Stir the mixture well and then use a sprayer to water the base of the plant.

How do you know exactly how much vinegar to use? That depends on how much you need to lower the pH of the soil. To measure this, the easiest way is to buy pH strips, which are cheap and easy to purchase, and you can use them to check the acidity of the soil. Remember that the goal for healthy hydrangeas is to keep the pH at 5.5.

You can also use vinegar as a homemade fungicide for plants. In this case, you will need to prepare a mixture with a higher concentration: one tablespoon of vinegar to one liter of water. With this mixture, spray the affected plants twice a week and after each rain, because when the heat comes and the humidity rises, the fungi have ideal conditions to multiply. Once you have completed the treatment and eliminated the fungi, do not continue spraying vinegar on the plants. This also acts as a repellent for many pests.