Are endless summer hydrangeas cold hardy? (2024)

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Are endless summer hydrangeas cold hardy?

Unlike other hydrangea varieties, Endless Summer hydrangeas have excellent winter hardiness and can withstand winter temperatures as low as -30 degrees Fahrenheit (or -34.4 degrees Celsius) at the coldest. This means that flowering is quite reliable regardless of winter temperatures.

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How cold can endless summer hydrangeas tolerate?

Unlike other hydrangea varieties, Endless Summer hydrangeas have excellent winter hardiness and can withstand winter temperatures as low as -30 degrees Fahrenheit (or -34.4 degrees Celsius) at the coldest. This means that flowering is quite reliable regardless of winter temperatures.

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How do you take care of endless summer hydrangeas in the winter?

Fall/Winter Care

Keep the soil moist through the fall months until the ground is frozen. Cover the plant with a four-inch layer of organic mulch (wood mulch, leaves, etc.). There is no need to cover all stems to the tip or to cut them back.

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Do you cut back endless summer hydrangeas for the winter?

Endless Summer Hydrangeas should not be pruned in the fall.

Instead, prune them only in May. This will ensure the flower buds that have made it through the winter have emerged. Prune out only dead wood and leave any green buds or leaves.

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What temperature is too cold for hydrangeas?

Effectively, a hydrangea should be able to sustain a temperature of minus-10 degrees. But in the real world, temperatures as low as 12 degrees — and late fall or early spring freezes — may reduce the flowering capability of this hydrangea.

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Do you deadhead endless summer hydrangeas in the fall?

"Bigleaf hydrangeas, such as endless summer, should be deadheaded when the first set of flowers sprout from last year's growth in the spring," says Meyers. This eliminates the faded flowers before the next flush appears.

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What is the difference between endless summer and macrophylla hydrangeas?

Bigleaf hydrangeas (Hydrangea macrophylla) have smaller, ball-shaped blooms that are usually blue or pink but can be white, red, purple, or a mix of colors. Another way to differentiate them is by their woody stem. Endless Summer® Hydrangeas are all bigleaf hydrangeas. Prefer morning sun and afternoon shade.

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Why won t my endless summer hydrangea bloom?

There are a few main reasons that you may not see blooms on your hydrangea bushes: sun exposure, over-watering and over-fertilizing. Endless Summer® hydrangeas prefer morning sun and afternoon dappled shade. If they are planted in full sun, it may be too hot and intense for the blooms to produce.

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Why won't my Endless summer hydrangea grow?

The most common reasons for Endless Summer hydrangea not blooming are pruning too much or at the wrong time of year, excessive application of nitrogen-rich fertilizer, overwatering the plant, the leaves receiving too much or too little sunlight, or overly extreme temperatures (cold winters, hot summers).

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Do endless summer hydrangeas like old or new wood?

Endless Summer is a cultivar of Hydrangea macrophylla, which typically blooms on old wood. Endless Summer is one of a few reblooming hydrangeas that are able to grow flowers both on old wood and on new wood. It is important to understand the flowering cycle when considering pruning outside the normal summertime window.

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Can you use Miracle Grow on endless summer hydrangeas?

Yes, you can use many types of all-purpose balanced Miracle-Gro on Endless Summer hydrangeas.

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How long does it take for endless summer hydrangeas to mature?

Endless Summer hydrangeas grow at a moderate rate. They don't grow too slowly or too quickly, and typically reach their mature size in 3 to 5 years. These hydrangeas produce large blooms lasting up to 8 weeks during the summer months.

Are endless summer hydrangeas cold hardy? (2024)
Should I cut off dead hydrangea blooms in winter?

You should deadhead throughout the blooming season to keep your hydrangeas looking their beast and encourage new flower growth. However, stop deadheading hydrangea shrubs in mid to late fall, leaving any spent blooms in place.

How should I winterize my hydrangeas?

The simplest method is to mound shredded leaves or bark mulch around the base of the plant to about 12 inches or so. Put the mulch mound in place in late fall after the ground freezes, and uncover plants in spring when temperatures begin to stay above freezing.

Can hydrangeas survive in 30 degree weather?

Some varieties, like smooth hydrangea (“Annabelle”) and panicle, or PG hydrangea, are very cold-hardy and bloom on new wood. If these are the species in your garden, you don't have to worry about winter kill on hydrangea. They don't need protection unless the temperature dips below negative 30 degrees F. (-34 C.).

Can hydrangeas survive a hard freeze?

Hydrangeas are hardy shrubs that can survive a winter freeze. As long as the shrub isn't subjected to repeated below zero temperatures, most species of hydrangea will be just fine through colder weather.

Do endless summer hydrangeas like sun or shade?

Endless Summer hydrangeas should be planted in a place that receives morning sun and dappled afternoon shade.

How do you care for the original endless summer hydrangeas?

Provide a layer of organic mulch to help retain moisture, add nutrients to the soil, and protect the plant in the cold winter months. Plant is a full sun to partial shade location, though this plant does best in partial shade. Water frequently, at least once per week. But ensure the soil does not stay wet.

What happens if you don't cut back hydrangeas?

What happens if you don't prune hydrangeas? If you don't prune hydrangeas then they can eventually resemble a tangled mass of woody stems, and the flowers will become smaller and less showy. If your hydrangeas are not blooming, lack of pruning is often a reason.

What is the hardest hydrangea to grow?

Hydrangea paniculata is one of the hardiest species; it thrives in Zones 4-8.

What is the most resilient hydrangea?

Panicle hydrangea are considered the most cold hardy of the species. They are reliable shrubs or small trees that require minimal fuss for success.

What hydrangea is similar to endless summer?

  • LADY IN RED HYDRANGEA. Hydrangea macrophylla Lady in Red. ...
  • LIGHT-O-DAY® HYDRANGEA. Hydrangea macrophylla Bailday. ...
  • ENDLESS SUMMER® HYDRANGEA. Hydrangea macrophylla Bailmer. ...
  • GLOWING EMBERS HYDRANGEA. Hydrangea macrophylla Glowing Embers.

Which hydrangea blooms the longest?

Penny Mac Hydrangea – Large flowers that just keep blooming! The Penny Mac hydrangea is super easy to care for and seems to thrive on neglect. While the blooms can change color, they're naturally a vivid blue. Blooms: Mid-summer-early fall.

Can you cut flowers off endless summer hydrangeas?

With their impressive colorful blooms, it is natural to cut and make hydrangea arrangements with Endless Summer hydrangea. They are an eye-catching addition as a fresh flower or in a dried arrangement during the fall and winter months.

What is the best fertilizer for endless summer hydrangeas?

"You're looking for a slow-release granular fertilizer that is labeled 'bloom boost,'" says Endless Summer expert Ryan McEnaney from Bailey Nurseries. Bloom boost fertilizers, such as Flower-tone ($12, Ace Hardware), have a higher level of phosphorus, which is the nutrient that promotes flower formation.

How far to plant endless summer hydrangeas from house?

Most of the varieties in Endless Summer will reach 3-4′ wide at maturity. I would give them at last two feet away from the foundation. Or even a little more if you don't want them touching the house. Summer Crush is the most compact, so you can plant that one a little closer.

Why are my endless summer hydrangea leaves curling and turning brown?

Most often, the reason hydrangea leaves and flowers turn brown is because the leaves are losing more moisture then the roots can draw up. Excess wind saps moisture away from the leaves causing them to turn brown and curl up. Lack of moisture around the roots causes leaves and flowers to turn brown.

What is the difference between endless summer and BloomStruck hydrangeas?

Endless Summer® is particularly susceptible to mildew growth and disease. BloomStruck® is more disease and drought-resistant while boasting thicker stems, which makes it more durable against heavy snows and strong winds.

Is Endless summer a Bigleaf hydrangea?

Endless Summer® The Original Bigleaf Hydrangea is a reblooming mophead hydrangea with classic Nantucket blue or soft pink flowers, depending on soil pH. Hardy from Zones 4-9, The Original provides season long, incredible color with its ability to bloom on last year's stems and this year's new growth.

Should I cut the old wood from my hydrangea?

Cut these stems close to the ground. Remember buds for blooms are produced on old wood and the more old wood you remove the less floral display in the spring and summer. To rejuvenate the hydrangea, remove up to 1/3 of the older living stems down to the ground each summer. This will revitalize the plant.

Are used coffee grounds good for hydrangeas?

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.

What month is best to plant hydrangeas?

What month is best to plant hydrangeas? The months of both spring and fall are best for planting hydrangeas, so long as the weather is mild. In spring, this should be after frost season, and in fall, before it begins again. If you need to plant in other months, avoid those that are very hot or very cold.

Do hydrangeas grow better in pots or in the ground?

*We don't recommend oakleaf hydrangeas because they don't often look their best when grown in a container. They flourish when planted in the ground. But if you enjoy the look, go for it!

Can endless summer hydrangeas turn blue?

Some hydrangeas change color easily. The original 'Endless Summer' is one. A potted blooming pink variety planted in strongly acidic soil will likely bear bright-blue flowers the following year.

How often to water newly planted endless summer hydrangeas?

our Endless Summer Hydrangea needs consistent moisture to stay healthy and produce beautiful blooms. Watering deeply once a week should be enough, but if temperatures are high or there's been little rain, you may need to water more frequently.

Do endless summer hydrangeas do well in pots?

Endless Summer hydrangeas are incredibly elegant on their own in pots. Whether you use the beautiful white hydrangea, Blushing Bride, or the rose-pink or purple hydrangea, BloomStruck, the large blooms make an impressive statement. A single hydrangea is a simple, easy and striking way to spruce up your home.

How do I get my endless summer hydrangea to bloom again?

To stimulate hydrangeas to bloom, it is important to provide the plants with plenty of sunlight and water. Make sure that the soil is well-draining and fertilize regularly in spring and summer. Prune each year in the summer after the flowers bloom, and avoid winter or spring pruning.

How do you protect hydrangeas from freezing?

A good way to start winterizing hydrangeas is to lay down a thick layer of mulch over their root area. Straw works well for this. For even greater protection, cover the shrub with a wire cage, or build a cage around it with strong stakes and chicken wire. Wrap burlap or insulation cloth around the cage.

Why are my endless summer hydrangeas turning brown?

"Soil that is either too acidic or too alkaline can quickly cause your hydrangea flowers to turn brown, so it's essential to have your soil tested to determine the right kind of fertilizer needed," she explains.

Can I bring my potted hydrangea inside for the winter?

5. Bring potted hydrangeas inside. Potted hydrangeas overwinter best in a garage or basem*nt 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.

Do endless summer hydrangeas come back every year?

Endless Summer is one of a few reblooming hydrangeas that are able to grow flowers both on old wood and on new wood.

How do you make endless summer hydrangeas purple?

In strongly acid soil (pH below 6), flowers turn blue. In alkaline soil (pH above 7), flowers turn pink or even red. In slightly acid or neutral soil (pH 6 to 7), blooms may be purple or a mix of blue and pink on a single shrub.

Does Hairspray preserve hydrangeas?

Spray: Once your hydrangeas are fully dried, spray them down with aerosol hairspray (sorry, aerosol spray just works better than the pump spray kind…it just does). I used to think that this was to coat the flowers so that their color would be preserved a bit longer.

Do you water hydrangeas in winter?

They're supposed to lose their leaves this time of year. Make sure it stays hydrated throughout the winter if you don't have snow cover. Even though the plants are dormant, they still need some hydration at their roots. Snow cover not only provides insulation, but also a water source.

Should I cut off brown hydrangea blooms?

Are the blooms on your hydrangea shrubs fading or turning brown? No need to worry – this is simply a sign that it's time to remove the flowers, a process called deadheading. When you deadhead hydrangeas, you aren't harming the plants at all.

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