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Wondering why hydrangeas aren’t blooming can be frustrating for any home gardener.Hydrangea is one of the most anticipated flowers of summer, and hydrangea that doesn’t bloom is a disappointment.
“I always knew it was July because people started calling us and asking why their hydrangea wasn’t blooming,” says Jenny Standard of Proven Winners, a leading US flower and plant brand
The reasons are as varied as the hydrangeas themselves, from not knowing how to care for hydrangeas or how to prune them, to predatory deer, to certain climatic reasons and more.To help you get to the root of your hydrangea problems, we’ve rounded up advice from top garden experts below.
There are two common basic reasons hydrangeas do not bloom: lack of sunlight and lack of time.Before you dig deeper, rule out that one of these two issues isn’t your culprit.
Hydrangea do well in partial sun, but need at least 4-6 hours of direct sun exposure, and another 4-6 hours of indirect sun exposure per day.
The second common reason hydrangeas don’t bloom is time.’A lot of people want the instant gratification of a garden, but that’s not going to happen.Perennials take years to mature,” says the standard. Depending on the type of hydrangea you have, it may take 2-5 years after planting to bloom.
If your hydrangea gets full sun and it’s at least a few years old, it’s time to look further into why it’s not blooming.
The next step in figuring out why your hydrangea isn’t blooming is knowing which type of hydrangea you have.
Different types of hydrangea are susceptible to different environmental factors.Knowing your type can not only help you diagnose the condition of your hydrangea this year, but also keep them healthy so they can bloom next year as well.
Each of these varieties falls into one of three categories: flowers that bloom on old wood, flowers that bloom on new wood, or flowers that bloom on both, also known as rebloom/remontant hydrangea.Knowing which type you have is the first step in diagnosing hydrangea problems, as they are susceptible to different variables.
Also consider what to plant with hydrangeas.Knowing how to successfully mix different plants is an important part of learning how to grow hydrangea.And, of course, companion planting is good for every plant in the mix.
Hydrangeas that bloom on old wood include mountain, oakleaf, climbing, and large-leaf varieties.These hydrangeas bloom on plant growth created last year.This means that no blooms this year could be due to what happened to the plants last year.
If you live in a cold climate, your plants may have been damaged by frost.Often, hydrangeas are damaged during spring temperature fluctuations.For example, if you have a heat wave one day and frost a few days later.
“There are a lot of things that can negatively affect hydrangeas that only bloom on old wood,” says Natalie Carmolli, a flowering shrub grower in Grand Haven, Michigan, Spring Meadow Nursery, Inc. Say.”First, the weather. These hydrangeas form the buds of next year’s flowers the summer before they finish blooming. They have a nice, tough protective shell that keeps the buds safe throughout the winter. However, if you’re in late winter Or warm up in early spring, then the shell will start to soften, so the buds will appear. If you get another cold snap or frost, those buds will now freeze to death. That means no flowers.
Old wood hydrangeas should not be pruned, as you will cut off any new shoots.If you pruned hydrangeas last year, they won’t bloom this year.Let them stay this year and wait for next year’s blooms.
“Improper pruning can also prevent this [hydrangea] from blooming,” Camogli said.”When in doubt, don’t prune!”
Another reason hydrangeas don’t bloom is that deer eat them.This affects all types of hydrangea and can be a more difficult factor to control, but there are a few things you can do each year to try and steer deer away from the bushes.
“You can try a deer deterrent spray every other night at the beginning of the season, before they establish a feeding pattern,” says Carmolli. ‘Deer are usually habitual animals, if you can teach them to avoid your hydrangea early on Flowers, they prefer to avoid them all season.That said, when the deer are really hungry, no idea what rules they might be breaking.
Hydrangeas that bloom on new wood include panicles and smooth hydrangea.They bloom on the growth created this year, which means that even if they are damaged, it is still possible for them to bloom this year with a small amount of TLC.Panicle hydrangea are considered to be one of the easiest plants to grow because they are more adaptable and bloom more reliably than other varieties.
Still, like old wood hydrangeas, new wood hydrangeas are susceptible to spring temperature fluctuations, which can damage buds and cause fewer blooms, or bloom later than average years.They can also be eaten by deer, and learning how to prune and when to plant hydrangeas will also ensure your hydrangeas bloom each year.Plus, once you know how to winterize your hydrangea, you can protect your precious shrubs from harsh weather and enjoy their gorgeous blooms year after year.
But if your panicle or other new wood hydrangea isn’t blooming, it’s probably not getting enough light, says Carmolli.Panicle hydrangeas bloom best when there is more than 4 hours of full sun per day.
That, or it’s too young.’Give new hydrangea about three years to develop a strong root system, which will help promote flowering.There’s a term called sleep (year one), wriggling (year two), jumping (year three) when it comes to getting a plant’s roots to establish so it can perform at its best, she says.
Re-blooming hydrangeas bloom on both old and new woods, including popular large-leaf varieties, pictured above.
“Both old wood and new wood bloom, so even if the flowers of the old wood are damaged, the new wood shoots that form in the same season will still bloom,” Camogli said. ‘Blooming may be delayed, but as long as they are not nibbled or pruned by deer drop [they can still bloom].Keep in mind that some regenerated plants bloom faster on new wood than others.Our Let’s Dance® range of bigleaf hydrangeas regenerates faster than traditional reborn flowers.
Again, whether your hydrangeas will bloom this year will depend on the type.In the case of old wood hydrangeas, you’ll have to wait until next year to bloom unless they bloom a little later than you planned.
“It’s a long game to get your hydrangeas blooming well,” says Camogli.”You can help it by making sure it doesn’t get stressed by lack of water – deep water 2-3 times a week instead of a little bit every day. If it’s hotter, add an extra day.
She also recommends adding 2-3 inches of mulch around the plant to help keep the roots cool and retain moisture, and make sure your hydrangea is in an area that gets at least five hours of sun a day.
Finally, “pay attention to covering shoots with sheets or a light tarp in early spring, and doing proper pruning for the best floral display,” she says.
‘A good shrub fertilizer, such as the one developed for roses, will help your entire hydrangea grow more vigorously.But there’s nothing to feed it specifically to encourage new shoots,” Camogli said. ‘Fertilize early in the spring and again in late spring according to the package directions. Don’t fertilize after July or your plants will just push new leaves forward (rather than extra flowers), when your plants should go dormant in the fall, they don’t have time to harden.
Kaitlin Madden Armon is a writer and editor covering all things family.Her work has appeared in Real Homes, Architectural Digest, Martha Stewart Living, Refinery29, Modern Luxury Interiors, Wayfair, The Design Network and many more.She graduated from Northeastern University with a degree in journalism and currently lives in Connecticut with her husband, three children and a black lab.
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Post time: Jun-14-2022