Whether you’re an experienced gardener or just starting out, learning the art of hydrangea pruning can bring out the beauty of your garden. Understanding the intricacies of when and how to prune these impressive flowering shrubs is essential to proper care. Proper pruning techniques will keep your plants healthy and ensure maximum flowering.
Winter may be the best time to prune your hydrangeas, but there’s a lot more to it than just a time frame. Want to learn the right techniques to ensure beautiful blooms season after season? Then you’ll want to read on for everything you need to know about pruning these beauties perennial flowers for shade!
Understanding hydrangeas
Hydrangeas are a great addition to just about anywhere. They make a beautiful statement in the front yard and add a touch of color and elegance to any garden. You can also enjoy their beauty indoors as they make beautiful cut flowers. Those flowers can be dried and keeps for years.
Before you start growing hydrangeasit is important to understand which variety of hydrangea you want to grow. Among the various varieties, four most popular types stand out: the musky, lace, panic and oak hydrangeas. Different types require different pruning techniques, as some hydrangeas bloom from “old wood” while others bloom from “new wood.” Don’t worry if this sounds complicated, we’ll explain more below!
When is the ideal time to prune your hydrangeas?
Just like pruning roses and pruning of most treeswinter is often considered the best time to prune your hydrangeas. They tend to be dormant during this time, however, it’s important to remember that you shouldn’t just prune based on the season. The right time also depends on what stage of growth your hydrangea is at.
Most of the time, winter pruning allows the plant plenty of time to recover and develop new buds before flowering season. It is a period of reduced growth activity for the hydrangea, minimizing the stress caused by pruning and positioning it for a strong return in the coming growing season. However, the variety will determine the optimal pruning time and technique you will need to use.
The distinction between old wood and new wood
It is important to understand that not all types of hydrangea should be pruned in winter. Varieties that bloom on old wood are best pruned immediately after flowering, in late summer or early fall. This is because they start forming flower buds soon after the current flowers die. So if you prune them in winter, you may accidentally remove flower buds for the coming season. Here’s a quick list for reference:
- Varieties that bloom on old wood: oak, bigleaf, mountain and climbing hydrangeas
- varieties that bloom on new wood: smooth and panic hydrangeas (see below)
You may notice from this list, the reality is that there are more varieties that are better suited to late summer pruning than winter! These “oldwood” hydrangeas are best suited for pruning right at the end of their flowering season when the blooms begin to look like those pictured below.
Don’t worry if you get the timing wrong though, your hydrangeas are likely to be quite forgiving. You can still prune old-wood hydrangeas in winter, just know to keep an eye on the flower buds – cutting them off will result in fewer blooms the following season.
When to Prune Hydrangeas in Winter
When it comes to hydrangeas that bloom on new wood, the best time to prune is usually inside late winter or even in early spring, just before the plant begins its new growth cycle. This timing strikes a balance between allowing the hydrangea to benefit from the dormant period before the plant directs its energy toward flowering.
Your climate can also play a role in the best time for winter pruning. In areas with milder winters, where temperatures remain above freezing and the hydrangea remains dormant for a shorter period of time, the ideal time for pruning may be toward early winter or early spring. This adaptation ensures that the plant is pruned while it is still dormant, avoiding any interference with the initiation of new growth.
In colder climates where winter lingers longer, waiting until late winter ensures that the hydrangea will benefit from the maximum period of dormancy. This delay also minimizes the risk of a late frost damaging the freshly pruned stems.
Reasons to prune your hydrangeas
Before you head out into the garden with your shears, determine what your goals are for your hydrangea bushes. Are they a little overgrown for your garden? Consider thinning the plant. Do they need some shaping? Pruning is your answer! Or you’re just looking to clean up unsightly dead stems and dried flowers. This sounds like they just need a little destruction.
Dilution
Take on this task carefully, as you don’t want to reduce the size of your hydrangeas to the point where you lose their beautiful fullness! This mostly depends on your preferences. If your hydrangeas seem shorter than they used to be, or some branches are too tall to support themselves, it may be time to trim them back. Focus on removing older stems to increase the vigor of your plants.
Pruning
Pruning is a common maintenance job for many perennials. We get into the details of how to prune your hydrangeas next, so I won’t spend too much time here.
deadly
If this last option sounds like what your plants need, you can do it anytime! A common chore in the care of many flowering plants, de-heading is the simple task of cutting off spent flowers that have become a bit untidy.
How to Prune Hydrangeas
Ok, so you’ve decided it’s time to prune your hydrangeas… Let’s go over the basics to make sure your pruning efforts are successful.
Gather and prepare your tools
First you’ll need the right tools. We recommend a basic set of bypass pruners. You probably already have some, so just make sure your pruning tools are clean and sharp. Sterilize your shears or pruners with rubbing alcohol and repeat this process between plants to prevent the spread of any diseases.
Prune out the correct stems gradually
Focus first on removing dead, damaged or weak stems. Don’t know how to identify dead stems? Check by scratching the stem with a fingernail. If you see green under the layer that has been removed, it is still alive. Once you start pruning, do it slowly, occasionally stepping back to notice the effects on the overall shape of your plant.
- Mop, oaks and hydrangeas with lace (flowering on old wood): prune immediately after flowering by cutting stems just above a healthy set of buds. I think this diagram does a great job of visualizing where to make cuts.
- Panic and smooth leaf hydrangeas (blooming on new wood): cut back older stems to a third of their length to encourage new growth. Some suggest cutting back to the base of the stems to improve flower size, but I would try it sparingly a season before cutting your entire plant.
Use clean, sharp tools to make angled cuts just above a set of healthy buds or a main branch. Cut at a 45-degree angle, sloping away from the bud. This will allow the water to drain, reducing the risk of disease. Gwen Wisniewski has a great post for more in-depth pruning techniques and tips.
Care after pruning
After the pruning process is complete, providing proper care to your hydrangeas is vital to their health and readiness for the upcoming growing season. Cover your plants, especially if you live in colder climates. If frost or frost conditions are expected after pruning, covering the plant with a cloth or burlap can protect it from potential damage.
After pruning, hydrangeas may benefit from a light application of a balanced fertilizer. Choose a fertilizer specifically formulated for flowering shrubs and follow the manufacturer’s directions for application. Water the plant well after fertilizing to help nutrients penetrate the soil and reach the roots.
Common hydrangea pruning mistakes
Hydrangeas are forgiving, so don’t stress too much as you approach the pruning process. However, these are some mistakes that are easily made. If you can avoid them, you’ll be well on your way to beautiful hydrangeas!
One of the most common mistakes is over-pruning your hydrangea. Removing too many stems or cutting them too much can stunt the plant’s growth and reduce the number of blooms for the coming season. Start conservatively and prune gradually, stepping back periodically to assess the shape of the plant.
Other mistakes include pruning at the wrong time for your variety of hydrangea, pruning healthy growth instead of dead growth, and treating all hydrangeas the same when different varieties may have very different needs. Always know which variety you are dealing with before you start pruning!
Prune your hydrangeas for healthy, happy plants!
Mastering the art of hydrangea pruning lays the foundation for a blooming garden full of vibrant blooms and healthy plants. So embrace the seasons, understand your plant’s needs, and use your pruning shears bravely! You will be rewarded with gorgeous blooms, healthy foliage and the satisfaction of growing thriving hydrangeas in your garden. Then check out our posts on English roses, great ground cover ideasand autumn garden cleaning to make your garden look better!
