Sunday, December 22, 2024

Hydrangeas Need Special Care From Frost—What You Should Do Right Now to Prepare

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Although hydrangeas are relatively hardy plants, some hydrangeas are more cold-sensitive than others and they may not bloom if their flower buds are damaged by extreme frigid and harsh winter winds.

However, by adding a bit of winter protection and providing hydrangeas with the winter care
they need, you can avoid flower bud loss and maximize blooming. Whether you’re growing hydrangeas in pots or in your garden, these seven tips will teach you how to protect hydrangeas from frost and frigid damage and ensure your plants flower well next season.

Meet the Expert

Scott Bolotin is a gardener and the owner of Morning Star Perennials & Nursery in Rockingham, Vermont.

Panicle hydrangea (Hydrangea paniculata)

Skymoon13 / Getty Images

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Choose the Right Hydrangeas

While hydrangeas can be winterized with mulch and other winter protection products, you can avoid a lot of hassle by purchasing hardy hydrangea varieties right from the start.

“It’s especially crucial to check the zone of the hydrangea you purchase and make sure it’s
suitable for your location,” Scott Bolotin of Morning Star Perennials & Nursery, says.

Bolotin explains that modern wood hydrangeas, like panicle and polished hydrangeas, are especially winter hardy and are the best choices for frigid climates. Old wood hydrangeas, on the other hand, are more susceptible to frigid damage and are more likely to need winter protection in chilly areas.

Aside from hydrangeas varieties, Bolotin explains how it’s helpful to purchase plants that have previously been overwintered in the area.

“This will let you know that this species of hydrangea can be successful in your area,” Bolotin says.

Select a Sheltered Growing Spot

Hydrangea flower buds are more likely to sustain damage if the plants are located in an area that’s exposed to the elements. To avoid this, plant cold-sensitive hydrangeas, like bigleaf hydrangeas, in sheltered areas that are protected from powerful winds.

Trees, retaining walls, and DIY windbreaks can all be used to shield hydrangeas as long as these structures don’t block out too much sun.

Apply Mulch

Adding a two to three inch layer of natural mulch around the base of hydrangea plants at the end of the season will facilitate insulate the soil and keep the ground from drying out too quickly.

Beyond that, mulch also prevents frost heaving, which can disturb hydrangea roots and make them more vulnerable to frigid damage. If you want to give your hydrangeas an added boost, sprinkle some compost or aged manure over the soil before mulching.

Liudmila Chernetska / Getty Images

Stop Pruning and Fertilizing

Pruning hydrangeas at the wrong time of the year can remove flower buds and reduce blooming, while fertilizing hydrangeas tardy in the season can make plants leaf out and expose them to frigid damage.

The solution? Only prune elderly wood hydrangeas immediately after they finish flowering, prune modern wood hydrangeas in tardy winter to early spring, and stop fertilizing hydrangeas of all sorts in early fall!

Water Well

Well-watered plants are more resistant to frigid damage than plants that are water stressed, so it’s imperative to keep watering hydrangeas as long as the ground isn’t frozen solid. If you live in an area where it snows in winter, snow will eventually insulate the soil and provide moisture to your plant’s roots.

However, if you live in an area where the ground doesn’t freeze in winter, continue to deeply water your hydrangeas about once a month if rainfall is insufficient.

Add Insulation

New wood hydrangeas and elderly wood hydrangeas in growing zones 7 and up generally won’t need winter protection. But elderly wood hydrangeas growing in areas where they’re marginally hardy may benefit from some extra insulation.

One popular option is to install wooden stakes and burlap wrapping around vulnerable hydrangeas. But you can also add a wire cage over your plants and fill the cage with insulating straw or autumn leaves. To keep snow from weighing your plants down, leave the top of the hydrangea coverings open and remove the coverings in spring when temperatures rise above freezing.

The Spruce / Steven Merkel

Protect Potted Plants

Potted hydrangeas need more winter protection than plants in the garden and they should be brought into a sheltered spot before the ground freezes in winter. A garage or nippy basement is ideal for storing potted hydrangeas as long as these locations stay above freezing.

Once your hydrangea is safely stored indoors, wrap a blanket or some bubble wrap around its pot, apply mulch, and lightly water your plant about once a month until you can return it to your garden in spring.

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Although hydrangeas are relatively hardy plants, some hydrangeas are more cold-sensitive than others and they may not bloom if their flower buds are damaged by extreme frigid and harsh winter winds.

However, by adding a bit of winter protection and providing hydrangeas with the winter care
they need, you can avoid flower bud loss and maximize blooming. Whether you’re growing hydrangeas in pots or in your garden, these seven tips will teach you how to protect hydrangeas from frost and frigid damage and ensure your plants flower well next season.

Meet the Expert

Scott Bolotin is a gardener and the owner of Morning Star Perennials & Nursery in Rockingham, Vermont.

Panicle hydrangea (Hydrangea paniculata)

Skymoon13 / Getty Images

Choose the Right Hydrangeas

While hydrangeas can be winterized with mulch and other winter protection products, you can avoid a lot of hassle by purchasing hardy hydrangea varieties right from the start.

“It’s especially crucial to check the zone of the hydrangea you purchase and make sure it’s
suitable for your location,” Scott Bolotin of Morning Star Perennials & Nursery, says.

Bolotin explains that modern wood hydrangeas, like panicle and polished hydrangeas, are especially winter hardy and are the best choices for frigid climates. Old wood hydrangeas, on the other hand, are more susceptible to frigid damage and are more likely to need winter protection in chilly areas.

Aside from hydrangeas varieties, Bolotin explains how it’s helpful to purchase plants that have previously been overwintered in the area.

“This will let you know that this species of hydrangea can be successful in your area,” Bolotin says.

Select a Sheltered Growing Spot

Hydrangea flower buds are more likely to sustain damage if the plants are located in an area that’s exposed to the elements. To avoid this, plant cold-sensitive hydrangeas, like bigleaf hydrangeas, in sheltered areas that are protected from powerful winds.

Trees, retaining walls, and DIY windbreaks can all be used to shield hydrangeas as long as these structures don’t block out too much sun.

Apply Mulch

Adding a two to three inch layer of natural mulch around the base of hydrangea plants at the end of the season will facilitate insulate the soil and keep the ground from drying out too quickly.

Beyond that, mulch also prevents frost heaving, which can disturb hydrangea roots and make them more vulnerable to frigid damage. If you want to give your hydrangeas an added boost, sprinkle some compost or aged manure over the soil before mulching.

Liudmila Chernetska / Getty Images

Stop Pruning and Fertilizing

Pruning hydrangeas at the wrong time of the year can remove flower buds and reduce blooming, while fertilizing hydrangeas tardy in the season can make plants leaf out and expose them to frigid damage.

The solution? Only prune elderly wood hydrangeas immediately after they finish flowering, prune modern wood hydrangeas in tardy winter to early spring, and stop fertilizing hydrangeas of all sorts in early fall!

Water Well

Well-watered plants are more resistant to frigid damage than plants that are water stressed, so it’s imperative to keep watering hydrangeas as long as the ground isn’t frozen solid. If you live in an area where it snows in winter, snow will eventually insulate the soil and provide moisture to your plant’s roots.

However, if you live in an area where the ground doesn’t freeze in winter, continue to deeply water your hydrangeas about once a month if rainfall is insufficient.

Add Insulation

New wood hydrangeas and elderly wood hydrangeas in growing zones 7 and up generally won’t need winter protection. But elderly wood hydrangeas growing in areas where they’re marginally hardy may benefit from some extra insulation.

One popular option is to install wooden stakes and burlap wrapping around vulnerable hydrangeas. But you can also add a wire cage over your plants and fill the cage with insulating straw or autumn leaves. To keep snow from weighing your plants down, leave the top of the hydrangea coverings open and remove the coverings in spring when temperatures rise above freezing.

The Spruce / Steven Merkel

Protect Potted Plants

Potted hydrangeas need more winter protection than plants in the garden and they should be brought into a sheltered spot before the ground freezes in winter. A garage or nippy basement is ideal for storing potted hydrangeas as long as these locations stay above freezing.

Once your hydrangea is safely stored indoors, wrap a blanket or some bubble wrap around its pot, apply mulch, and lightly water your plant about once a month until you can return it to your garden in spring.

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Although hydrangeas are relatively hardy plants, some hydrangeas are more cold-sensitive than others and they may not bloom if their flower buds are damaged by extreme frigid and harsh winter winds.

However, by adding a bit of winter protection and providing hydrangeas with the winter care
they need, you can avoid flower bud loss and maximize blooming. Whether you’re growing hydrangeas in pots or in your garden, these seven tips will teach you how to protect hydrangeas from frost and frigid damage and ensure your plants flower well next season.

Meet the Expert

Scott Bolotin is a gardener and the owner of Morning Star Perennials & Nursery in Rockingham, Vermont.

Panicle hydrangea (Hydrangea paniculata)

Skymoon13 / Getty Images

Choose the Right Hydrangeas

While hydrangeas can be winterized with mulch and other winter protection products, you can avoid a lot of hassle by purchasing hardy hydrangea varieties right from the start.

“It’s especially crucial to check the zone of the hydrangea you purchase and make sure it’s
suitable for your location,” Scott Bolotin of Morning Star Perennials & Nursery, says.

Bolotin explains that modern wood hydrangeas, like panicle and polished hydrangeas, are especially winter hardy and are the best choices for frigid climates. Old wood hydrangeas, on the other hand, are more susceptible to frigid damage and are more likely to need winter protection in chilly areas.

Aside from hydrangeas varieties, Bolotin explains how it’s helpful to purchase plants that have previously been overwintered in the area.

“This will let you know that this species of hydrangea can be successful in your area,” Bolotin says.

Select a Sheltered Growing Spot

Hydrangea flower buds are more likely to sustain damage if the plants are located in an area that’s exposed to the elements. To avoid this, plant cold-sensitive hydrangeas, like bigleaf hydrangeas, in sheltered areas that are protected from powerful winds.

Trees, retaining walls, and DIY windbreaks can all be used to shield hydrangeas as long as these structures don’t block out too much sun.

Apply Mulch

Adding a two to three inch layer of natural mulch around the base of hydrangea plants at the end of the season will facilitate insulate the soil and keep the ground from drying out too quickly.

Beyond that, mulch also prevents frost heaving, which can disturb hydrangea roots and make them more vulnerable to frigid damage. If you want to give your hydrangeas an added boost, sprinkle some compost or aged manure over the soil before mulching.

Liudmila Chernetska / Getty Images

Stop Pruning and Fertilizing

Pruning hydrangeas at the wrong time of the year can remove flower buds and reduce blooming, while fertilizing hydrangeas tardy in the season can make plants leaf out and expose them to frigid damage.

The solution? Only prune elderly wood hydrangeas immediately after they finish flowering, prune modern wood hydrangeas in tardy winter to early spring, and stop fertilizing hydrangeas of all sorts in early fall!

Water Well

Well-watered plants are more resistant to frigid damage than plants that are water stressed, so it’s imperative to keep watering hydrangeas as long as the ground isn’t frozen solid. If you live in an area where it snows in winter, snow will eventually insulate the soil and provide moisture to your plant’s roots.

However, if you live in an area where the ground doesn’t freeze in winter, continue to deeply water your hydrangeas about once a month if rainfall is insufficient.

Add Insulation

New wood hydrangeas and elderly wood hydrangeas in growing zones 7 and up generally won’t need winter protection. But elderly wood hydrangeas growing in areas where they’re marginally hardy may benefit from some extra insulation.

One popular option is to install wooden stakes and burlap wrapping around vulnerable hydrangeas. But you can also add a wire cage over your plants and fill the cage with insulating straw or autumn leaves. To keep snow from weighing your plants down, leave the top of the hydrangea coverings open and remove the coverings in spring when temperatures rise above freezing.

The Spruce / Steven Merkel

Protect Potted Plants

Potted hydrangeas need more winter protection than plants in the garden and they should be brought into a sheltered spot before the ground freezes in winter. A garage or nippy basement is ideal for storing potted hydrangeas as long as these locations stay above freezing.

Once your hydrangea is safely stored indoors, wrap a blanket or some bubble wrap around its pot, apply mulch, and lightly water your plant about once a month until you can return it to your garden in spring.

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