Reblooming hydrangeas flower on both new and old growth, meaning you can enjoy flowers from June until the first frost. They'll continue to bloom long after other flowering shrubs and perennials have stopped. Long lasting blooms of blue, violet, pink, white, or chartreuse add brilliant pops of color to any garden.
You'll find hydrangeas growing in hardiness Zones 3 to 7 as perennials. With flowers starting in spring and often last throughout summer into early fall, hydrangea flowers can be the foundation plant of your landscape.
Blooming hydrangeas are one of the most elegant and beautiful highlights in any garden. Starting in mid summer and continuing into September, Hydrangea paniculatas take center stage. With their fresh foliage and large cone shaped flowers, they add a dramatic accent to any garden border or planting bed.
A major availability factor is whether a flower or greenery is grown in a greenhouse or out in a field that can be impacted by the weather. For example, hydrangeas and chrysanthemums can be greenhouse grown and, as a result, sourced all months of the year.
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.
Hydrangeas do not require strict reqular pruning; simply keep them healthy by removing dead wood and they will grow and flower well.
Hydrangeas that bloom on new wood can be safely pruned in late fall once the plants have gone dormant or in early spring. Next year's flower buds won't be formed until late spring the same year they bloom, so there is no risk of removing the buds if you prune in fall or spring.
Fall Bloomers
"Re-blooming varieties of Hydrangea macrophylla may produce some blooms into the fall," he adds. "Varieties like 'Seaside Serenade Newport' have flowers that can last for a couple of months—so they can continue to add beauty in autumn with their summer blossoms."
Unfortunately, their beauty doesn't last all year. Once the flowers and foliage die back in fall, you'll need to head out into the garden for your annual hydrangea maintenance session. These tasks are vital to keeping your plants looking great and ensuring they come back even stronger the following year.
Reblooming hydrangeas flower on both new and old growth, meaning you can enjoy flowers from June until the first frost. They'll continue to bloom long after other flowering shrubs and perennials have stopped. Long lasting blooms of blue, violet, pink, white, or chartreuse add brilliant pops of color to any garden.
Mophead hydrangeas look lovely in the fall when their blue, purple and pink flowers contrast with the fall foliage. Brown flowers can be snipped off if they annoy you, but you don't have to remove them. Look for flowers like this to dry or for making Hydrangea Wreaths.
The best time to deadhead is when the first set of blooms on your hydrangeas begin to turn brown and dry. Cut the stem below the flower head and just above the first set of leaves. For reblooming types, you can deadhead again when this second set begins to fade, but only through mid-August or so.
Cut-flower hydrangeas are available year-round, with the best quality ones offering gorgeous colors and blooms during the months of May to November.
According to Hirvela, your hydrangea is done blooming when the color of the flowers has faded in a non-appealing way. "There are a few varieties that will continue to push out new buds through late summer and autumn," she says.
Removing spent flowers will ensure your hydrangeas produce healthier, more bountiful blooms later on.
Some introductions such as the Forever and Ever series or the well known Endless Summer family bloom both on old wood and new wood. The spring flowers occur on the prior year's old wood, while the fall flowers occur on the plant's current-season new-wood growth.
But when to prune them? Prune fall blooming hydrangeas, or old wood bloomers, after they bloom in the summer. If you prune old wooded hydrangeas in fall, you are cutting off next seasons blooms. Summer blooming hydrangeas, or those that bloom on new wood, are pruned in the fall, after they stop blooming.
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.
To reduce the size of a hydrangea that blooms on new wood, cut off about one-third of each stem in late fall or early spring before it begins to leaf out. If your hydrangea blooms on old wood, prune right after it has bloomed when the flowers are fading.
"Stop deadheading in the fall, when bigleaf hydrangeas produce their last flush of flowers, to enjoy the dried blooms throughout the winter," she says. "These can be removed to help produce healthy buds in the spring."
Bottom-line: Panicle-type hydrangeas should be pruned in late winter or early spring. While they could be pruned in fall, we highly advise waiting until late winter/early spring to reduce risk of injury.
Wrap with winter protection.
During the winter, make a DIY A-frame wire cage out of burlap and chicken wire to protect your hydrangea plant. This cage will protect it from winter winds, heavy snowfall, and cold temperatures.
In late winter or early spring, these shrubs can be cut all the way back to the ground. Smooth hydrangeas will produce much larger blooms if pruned hard like this each year, but many gardeners opt for smaller blooms on sturdier stems.