Care for hydrangea plants


How to Grow and Care for Hydrangeas

With dozens of species and even more varieties, hydrangeas (Hydrangea spp.) have been popular ornamental garden plants for decades with blooms that come in a wide array of colors, including white, many shades of blue and pink, maroon, red, and even pale green. Some hydrangeas have large, round flower heads while others have smaller, flatter, and more delicate flowers, along with varying foliage shapes depending on the species. To ensure that hydrangea shrubs have time to establish a healthy root system, plant them in the fall or early spring. Hydrangeas are rapid growers, averaging two feet or more of growth per year. Be aware that the plant is toxic to humans and animals.

Watch Now: How to Grow and Care for Hydrangeas

Common Names Hydrangea, hortensia
Botanical Name Hydrangea spp.
Family Hydrangeaceae
Plant Type Deciduous shrub
Mature Size Up to 15 ft. depending upon variety
Sun Exposure Full, partial
Soil Type Any 
Soil pH Any pH but it can influence bloom color
Bloom Time Mid-summer through fall
Flower Color Varies depending on species: white, blue, pink, maroon, red, purple, and pale green
Hardiness Zones 5—9 (USDA)
Native Area Asia, the Americas
Toxicity Toxic to humans and animals

Hydrangea Care

Most hydrangeas can adapt to a wide range of growing conditions. They are generally hardy from USDA hardiness zones 5 to 9. If they are planted in well-draining soil with plenty of organic matter, they should grow well. These versatile shrubs thrive in sandy coastal soils, shady woodland sites, and almost everything in between.

Plan to water your hydrangeas regularly to keep them consistently moist, especially in hot and dry weather and fertilize them once in the spring.

The right time to prune a hydrangea varies according to the hydrangea species and the time of year when they set buds.

​The Spruce / Claire Cohen Bates ​The Spruce / Claire Cohen Bates The Spruce / Adrienne Legault

Light

Too much shade can reduce flower output. Hydrangeas do well in the partial shade provided by tall deciduous trees, especially if they receive morning sun and the partial shade occurs in the heat of the afternoon. They will also thrive in full sun but might need extra water on hot summer days.

Soil

In general, hydrangeas can tolerate a wide range of soil types but they grow best in fertile, humus-rich soil. A notable characteristic of Hydrangea macrophylla is that you can control bloom color by adjusting the soil pH. Acidic soil with a pH of 6.0 or lower produces blue flowers and neutral to alkaline soil with a pH of 7.0 or higher produces pink blooms.

Water

Hydrangeas need consistent moisture throughout the growing season: give your hydrangeas a deep drink of water one to two times every week. If your area has had significant rainfall, you can cut back on supplemental watering. Each time you water, water deeply until the ground feels saturated but is not waterlogged. A light watering every day is not sufficient because the water will not reach the root system to hydrate the plant.

During particularly hot weather, increase the amount of water you give your plants so the soil remains damp, but make sure they're not sitting in soggy soil. To know if you need to water your hydrangea, stick your finger down about four inches into the ground and if it feels dry to your fingertip, it's time to water.

In extremely hot weather, hydrangeas might curl their leaves and appear wilted. This is a built-in protection and does not necessarily mean that the plant needs water. If you observe this behavior, take another look at the plant at dusk to see if it has recovered once temperatures have cooled down.

Temperature and Humidity

Hydrangeas prefer fairly mild temperatures. In areas with bitterly cold winters, dieback can be a problem if the hydrangea is located in an unprotected area or one that receives too much winter sun.

Because hydrangeas prefer to grow in partial shade, they usually do best when planted in a north- or east-facing site, where winter temperatures remain somewhat constant. Avoid planting on the south and west side of your property where the warmth of winter sun could cause buds to swell prematurely and become vulnerable to cold snaps.

Hydrangeas prefer moderate to high humidity and dry climates can cause their leaves to brown and become dry.

Fertilizer

If your soil is rich in nutrients, you likely won't have to fertilize your hydrangeas. In fact, if hydrangeas are given too much high-nitrogen fertilizer, the foliage will be full and lush but with fewer blooms. If the soil is not fertile, in the spring spread of layer of organically rich compost around the plants or apply a fertilizer suitable for flowering shrubs.

Types of Hydrangea

From the many species of hydrangea, the following are the most commonly used as ornamental shrubs. Some of these hydrangea species bloom on new growth (the current year's new stems) and those that bloom on old growth (last year's stems) .

Propagating Hydrangea

Hydrangeas rarely produce seeds, but there are two common ways to propagate the plant. Taking stem cuttings at the right time may result in stronger, more resilient roots that nearly guarantee success when transplanting them into the ground. The second method is to root the hydrangeas right into the ground without having to cut into the shrub until the last step. This is the preferred method if you want to fill gaps between shrubs in your garden or you want a more dense stand of shrubs.

Propagating by cuttings

  1. In the very early fall, select a new growth stem at least six-to-eight inches long that does not have a flower. New growth will be lighter green than old growth.
  2. With a sterile, sharp pruner, cut the stem below a leaf node (a node signifies where a set of leaves are set to grow). Keep a set of leaves on the stem in addition to a node.
  3. Strip the bottom leaves, but keep the top set of leaves. Carefully cut the remaining leaves in half horizontally (crosswise), not vertically.
  4. Dip the bottom of the cutting in rooting hormone.
  5. Place the end of the cutting into a small eight-to-ten inch pot filled with damp potting soil. (One pot can hold several cuttings.)
  6. Make a mini-greenhouse by covering the pot with a plastic bag and closing it at the bottom of the pot. Cut a couple of small slivers on top of the bag so the cutting can breathe. Do not let the bag touch any of the leaves.
  7. Put the pot in a spot that is away from any direct sunlight and keep the soil slightly damp.
  8. In two to four weeks, a root system should begin to develop. You can transplant the cutting so that it can have the winter to establish a strong root system.

Propagating by rooting branches directly in the soil

  1. Bend down a long stem/branch so that a large piece of it touches the soil.
  2. Trim leaves from the part of the branch that is touching the soil.
  3. Push the branch down into the soil as best as you can without breaking the branch. You could also push the tip of the branch into the soil.
  4. Secure the branch by weighing it down with a brick or large rock. You won't injure the branch.
  5. Water the branch just as you typically water the parent hydrangea.
  6. Occasionally remove the weight and gently tug on the branch to see if it has rooted. Once rooted, you no longer need to weigh it down.
  7. Once it has rooted, you will need to clip the branch from its parent plant so the new shrub will be self-sustaining.
  8. If you do want to dig up the newly rooted shrub to move it, wait a couple of more weeks after you've clipped it so it can be strong enough for transplanting.

Overwintering

Some types of hydrangeas, such as the bigleaf hydrangea, can be susceptible to winter bud damage. If you live in a very cold area with harsh winters, protect your hydrangea plants from cold winds by wrapping them with burlap or putting up burlap screening. You can also tie the branches together along with the burlap to give them extra help to survive winter. Remove the burlap when the buds begin to swell.

Common Pests & Plant Diseases

The usual types of garden pests can affect hydrangeas, including aphids, black vine weevil, the four-lined plant bug, Japanese beetles, and spider mites. Rose chafer pests can injure the plant by eating and leaving skeletonized leaves behind. Chemical insecticides or less harsh insecticidal soaps may help eliminate most of these insects, but avoid using them during the bloom period. Instead, hand pick these pests into pails of soapy water.

Hydrangeas are susceptible to diseases including botrytis blight, powdery mildew, and other viruses such as yellow or brown leaf spotting. Fungicides can help with most problems, but destroy plants infected with viral spotting.

Common Problems With Hydrangea

Here are the most common problems that can occur with hydrangeas.

No Blooms

Hydrangeas may not bloom every season. The reason could be pruning at the wrong time of year, damage to buds during unexpected spring or winter cold snaps, or at some point you may have overfertilized the plant.

The right time to prune a hydrangea varies according to the hydrangea species and the time of year when buds are set. Thus, it is important to know the type of hydrangea you are growing in order to know when to prune it.

Drooping Leaves

Hydrangea leaves can droop due to lack of water. This happens during bloom time or very hot, dry weather, so keep hydrangeas consistently moist.

However, drooping leaves might not always be a sign that a hydrangea needs water. These plants have a built-in protection mechanism where they will curl their leaves downward In extremely hot weather and appear to be wilted. When daytime temperatures are around 90 degrees Fahrenheit or higher and you observe this behavior, take another look at the plant at dusk to see if it has recovered once temperatures have cooled down. If the plant is still wilted as temperatures cool, that could be a sign of dry soil that requires a deep watering.

Yellowing Leaves

Yellowing leaves can indicate that a plant has been overwatered, underwatered, or overfertilized. It might be possible to save the shrub by saturating the roots if the problem is that it's too dry or overfertilized. Otherwise, you may need to dry out the roots of an overwatered shrub in the hope that it save the plant.

Brown Leaf Tips or Edges or Tips

This problem can occur if the roots have been burned by over-fertilization. Brown edges or tips can also occur if too much aluminum sulfate was added to the soil to change the color of the blooms. If this occurred, flush the soil with water to remove the excess salts or fertilizers. Then, let the soil surface dry for a day or two before watering again, and abstain from fertilizing until the plant is healthy once again.

FAQ

Watch Now: How to Prune Hydrangeas

Watch Now: How to Make a Wreath With Hydrangea

Article Sources

The Spruce uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

  1. “Hydrangea." North Carolina State University Extension Office.

  2. “Hydrangea.” ASPCA.

  3. "Hydrangeas in the Garden.” Rutgers.Edu.

How To Grow And Care For Hydrangeas

Home › Ornamental Gardens › Shrubs › Hydrangeas

Hydrangeas

By: Nikki Tilley, Author of The Bulb-o-licious Garden

Image by tioloco

Who can forget the ever-changing blooms of hydrangeas– changing blue in acidic soil, pink in that with more lime and reminiscent of those science class projects using litmus paper. And then of course the white hydrangeas, with blooms resembling large snowballs that as children would often amaze us. As adults, they still do, which is why growing hydrangeas is so much fun.

They’re not only easy to grow but are also quite hardy and resistant to most pests and diseases, making it even easier to care for hydrangeas. With numerous varieties to choose from, you’re certain to find one that’s right for you.

Growing Hydrangeas

Although there are many types of hydrangeas, most can be grown in full sun or partial shade. Keep in mind, however, that many hydrangeas do not like extremely hot conditions, so try to locate them in an area where they can enjoy some afternoon shade. While they can be grown in a wide range of soils, hydrangeas typically prefer rich, moist soil that drains easily. Amending the soil with compost prior to planting is helpful.

Hydrangea planting should be performed in spring once the threat of frost has passed. Water thoroughly after planting. You can also add a layer of mulch following hydrangea planting.

Hydrangea Care Guide

Water is an important factor when you care for hydrangeas. They enjoy deep watering at least once a week, especially in dry weather. Hydrangeas also benefit from an occasional boost of fertilizer once or twice a year in spring or summer.

Hydrangeas can also be transplanted easily, but this should only be done during dormancy in fall or winter. Be sure to dig up the entire rootball and replant immediately. Since flowers are produced on new growth, you should prune hydrangeas once their blooming has ceased.

Pruning Care for Hydrangeas

As there are many types of hydrangeas, the pruning and care of hydrangeas may differ slightly with each. The most common types of hydrangea are the Mopheads and Lacecaps (H. macrophylla). These are the varieties with the large, globe-shaped flowers that many of us remember as kids. Pruning for these usually takes place in late summer.

The Oakleaf hydrangea (H. quercifolia) is another commonly grown variety. With its unique fall color and oakleaf-shaped foliage, this variety usually provides year-round interest. It also tolerates drier conditions. Oakleaf is best pruned in early spring.

Panicle (H. paniculata), or Pee Gee, exhibits white flowers in summer, which gradually turn pink. Prune to remove spent blooms and thin or cut back the plant in late winter/early spring.

H. arborescens  ‘Grandiflora’, or Hills of Snow hydrangea, should be pruned to the ground each winter or early spring as well.

The hydrangea vine or climbing hydrangea (H. anomala) doesn’t usually require pruning, but it may be done in order to keep the new shoots under control.

Growing hydrangeas is easy, as is the care of hydrangeas. These beautiful bushes reward you each year with magnificent blooms that will instantly take you back to those fond childhood days.

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How to take care of hydrangeas in spring

Hydrangeas are one of the most beautiful flowering shrubs, amazing with the grace of forms, brightness of colors and shades of their huge inflorescence caps, which also change color several times throughout the summer season.

We have already told about this amazing plant, the history of its appearance, varieties and specific cultivation techniques in our article: “Frost-resistant hydrangeas in your garden”.

Today we will talk about how to care for hydrangeas in spring, especially since all the main work of this period begins in April.

Recall that hydrangea is a beautifully flowering shrub up to 3.5 m high. On the territory of our country, amateurs mainly grow only a few frost-resistant species: paniculate, oak-leaved, tree-like and large-leaved

There are several other liana-shaped species, such as hydrangea petiole , but our gardeners plant them much less frequently.

IMPORTANT FEATURES OF CARE OF HYDROANGIA IN SPRING

Start caring for all types of hydrangeas only after the snow has completely melted (each region has its own terms).

Give oxygen to the roots!

As soon as the snow melts, remove the winter cover and loosen the soil around the bushes well to provide fresh air to the roots.

Wake up the plants with the first watering!

To start the growth and formation of flower inflorescences, any hydrangea after "hibernation" needs a large amount of water. Therefore, immediately after loosening the near-stem circles, carry out the first watering only with warm water (20 liters for each bush).

Water early in the morning right under the roots to avoid splashing on stems and leaves. Otherwise, you can burn the delicate tissue of plants. Hydrangea is a very moisture-loving plant, so it should be watered every 5 to 6 days (depending on the weather).

To prevent any diseases caused by pathogens found in the soil, add a pinch (per 1 bucket) of potassium permanganate to irrigation water so that the water remains almost transparent with a slight pinkish tint.

Have you watered the plants? Now - feed!

All hydrangeas are fed three times per season. The first top dressing with a solution of urea (2 tablespoons) and potassium magnesia (1 tablespoon) per 10 liters of water for each plant is given to hydrangeas on April 14-16. Usually it is done immediately after the second watering on well-wetted soil.

The second time hydrangeas are fed after the appearance of buds with natural fertilizer for hydrangeas, which you can buy from us.

The third time - in autumn (at the end of September) the plants need to be given potassium-phosphorus nutrition. For this, a ready-made mineral complex for autumn feeding of ornamental shrubs is best suited. At the same time, strictly observe the dosage indicated on the package.

Don't forget loosening and mulching!

Hydrangea is a large shrub with a large green mass of leaves and huge buds, so it needs good aeration. This is especially true for the root system.

And the soil in the root layer must always be well moistened (but not flooded with water, otherwise the access of oxygen to the roots will stop).

Therefore loosen the tree trunks weekly after watering, and then mulch them with peat chips or sawdust in a layer of 6 - 8 cm. The mulch will retain moisture around the roots and, in addition, will prevent the growth of weeds around the plants.

Carefully loosen with a special light hoe for flowers, so as not to damage the trunk and roots.

Spring pruning for beauty and health!

This is a very important agricultural practice that is carried out in April before the start of sap flow and the formation of young shoots. The first pruning of hydrangeas is done 3 to 4 years after planting.

Here it is important to remember that each type of hydrangea has its own type of pruning!

Hydrangea pruning . Flowering in this type of hydrangea occurs on the shoots of last year. Therefore, only faded shoots are cut out from her in the fall, and the young ones are left until next year. In the spring, remove only broken and frozen branches and the remains of old faded branches if you did not have time to cut them last year.

Pruning tree and paniculate hydrangea . In these species, flowering occurs on young one-year-old shoots, so they cut out last year's and older branches at the base in order to “give way” to young shoots and help them grow and bloom faster.

These hydrangeas are pruned in early April.

Oakleaf Hydrangea Pruning . It blooms all summer: first on the last year's shoots (up to 30% of flowers are formed), and then on one-year-old shoots (up to 70% of flowers).

Therefore, in spring (April), last year's shoots are shortened to three pairs of buds to make room for the rapid growth of current shoots.

When last year's shoots have faded, they are cut out at the base of the bush, disinfected with potassium permanganate and covered with garden pitch.

In addition to these and obligatory for all types - the usual sanitary pruning, once every 6 - 8 years, make your beauties rejuvenating pruning. After it, 6 - 8 of the strongest shoots should remain. Feel free to cut out all other branches and processes. Be sure to remove old shoots that are more than four years old.

First cut, then pinch!

In order for hydrangea bushes to be lush and have the correct shape (without any crooked sides), the ends of all shoots without exception must be cut. This procedure is carried out every year in the spring in May.

After such pinching, the shoots stop growing in length and begin to bush in different directions. This gives the plants an unusual splendor.

In addition, remove any excess side shoots. Then the inflorescences of your hydrangeas will be larger and brighter colored. After all, shoots that do not bloom take a lot of nutrition from the plant, and flowering will turn out to be more scarce.

THE BEST HYDRANIA VARIETIES FROM OUR COLLECTION

Now that you know how to properly care for hydrangeas in the spring, we invite you to choose the best varieties from our unique collection.

New:

Oakleaf Hydrangea – Harmony, Snow Flakes.

Our collection:

Large-leaved Hydrangea – Joy, Fiery Red, Blue Bird, Mint.

Hydrangea tree - Sterilis, Annabelle.

Hydrangea paniculata - Grandiflora, Vanilla Fries, Sunday Fries, Unique, Lemon Light.

Liana - Petiole hydrangea.

Today, these are the most fashionable and most beautiful varieties! Choose! With their lush, bright flowering, any of these hydrangeas will transform your garden in an amazing way and will delight you with their unearthly beauty from early summer to late autumn!

You can buy these varieties from us right now together with a unique natural fertilizer for hydrangeas, which is also perfect for azaleas, rhododendrons and blueberries!

10 Tips - Roomble.

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2021-09-10T10:10:20+00:00 2021-09-10T10:18:26+00:00 How to care for hydrangea: 10 useful tips 2021-09-10T10:10:20+00:00 Your garden lacks hydrangea, but you find it too demanding? We will tell you about the main rules of care How to care for hydrangea: 10 useful tips

Does your garden lack hydrangea, but do you find it too demanding? We will tell you about the main rules of care

Even experienced gardeners look enviously at the delicate caps of hydrangeas in other people's gardens. And all because the hydrangea is a capricious flower that requires special treatment. By itself, alas, it does not grow. We reveal 10 main secrets of caring for a whimsical, but fantastically beautiful perennial hydrangea.

More than seventy types of hydrangeas are known. Some varieties do not have time to bloom, as expected, due to too short a summer. The growth of this plant, its full development is directly dependent on the climate in which the flower begins its garden life. If you have chosen the wrong variety, you can not expect your hydrangea to bloom luxuriantly. That is, first you need to choose the type of plant that is ideal for your climatic conditions. Considering that Russia is still a cold country, we choose frost-resistant species. Paniculata hydrangea grows up to five meters in length, pleases with flowering for forty years or more; tree-like hydrangea raises by two meters, ground cover - up to three meters. Be sure to study the characteristics of the species and methods of cultivation in order to find your plant, which will bloom in the shortest possible time.

Hydrangea is capricious. She needs loose soil and a maximum of nutrients. With a sufficient "diet" the plant will please with a quick and spectacular flowering. Before planting a plant, the earth should be mixed with superphosphate and sand. And do not forget to water abundantly, periodically deliver compost to the root zone of the flower and acidify the soil for large-leaved species. The deeper the pit for planting, the more abundantly your “vessel of water” will bloom (as the name of the plant is translated from Latin).

You have already realized that this plant is extremely capricious. Its attractiveness is quickly lost under the scorching rays of the sun. The ideal solar regime for hydrangeas is some mild sun in the morning, some in the evening and partial shade during the day.

When choosing a place for planting hydrangeas, remember that she loves not only the soft sun and nutritious soil, but also space. There should be enough space both in height and, of course, in width - so that each bush has enough sun, water, heat and space. By the way, the distance between the bushes should be at least a meter. Hydrangea grows very quickly, keep this in mind when planting plants, for example, along a garden path, so that later you do not have to put unpresentable spacers.

It is recommended to fertilize the plant abundantly only at the planting stage. But during the flowering period, it is better not to rush with organic fertilizers: abundant nutrition during this period will lead to the growth of foliage instead of the appearance of lush flowering caps. However, a mixture of phosphorus and potassium will benefit the flower. And, of course, watering: do not spare water on the hydrangea - it loves moist soil (mulch will help you).

Editor's opinion:

Abundant flowering of hydrangeas is possible subject to the main conditions: proper planting, careful care in the summer (feed, water, cut, mulch), preparation for winter and transplant in spring. Experience is the son of difficult mistakes. But mistakes can be avoided if you approach the matter with all responsibility and with love for your gardening business.

Correct and timely pruning of the plant will accelerate the formation of buds and fresh shoots. Cut a flower (tree hydrangea - exactly) in early spring to stimulate its growth. It is due to the competent pruning procedure that the bush is fouled with the very lush caps of inflorescences.

If your beautiful hydrangea has not grown into tender caps of inflorescences, you may need to look for errors in the "feeding" of the plant. Competent top dressing is one of the components of the overall care system for this capricious plant, and it is simply necessary for the appearance of large buds and for healthy growth in general. In early spring, hydrangea can be fed with nitrogen-based fertilizers (often a mixture of potassium sulfate and urea is used), in summer and early autumn - potassium with phosphorus. Do not forget to acidify the soil with whey with citric acid.

Compared to other plants, hydrangea is not so attractive to pests. And yet, despite the absence of powerful pest attacks, sometimes you have to deal with slugs, which love hydrangeas with passion. If small “perforations” appear on the buds and leaves, as well as silvery traces, then it’s time to dig in the beer. We drop the drink in cups at the level of the soil and wait until the slugs, which will never give up alcohol, die. Distribute crushed egg shells along the perimeter of plant growth: slugs are naturally stupid, and they cannot overcome such a “protection”.

No matter how capricious this plant may seem, even a novice gardener can avoid the negative development of the scenario. It is only necessary to provide hydrangeas with the most comfortable conditions for growth. Namely: for starters, do not cut the roots during transplantation and do not shake off the soil from them. Next, we mix the earth from the pot familiar to the hydrangea with the soil in the garden, and we already fill the pits with this mixture, not forgetting sand and fertilizers. We constantly feed our botanical "child" until it takes root in a new place. And remember that the hydrangea, although beautiful, is a poisonous flower that can be dangerous for babies and pets.

This flower has a hard time accepting a change of residence. Therefore, without urgent need, do not disturb your "pet". After transplantation, the bush wilts, growth and flowering are inhibited.


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