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You get a clematis to rebloom by using the correct pruning technique for your specific variety, as this is the single most important factor in encouraging a second flush of flowers.
Whether you can get a clematis to rebloom depends entirely on whether it blooms on old wood, new wood, or both, so identifying your plant’s group is the first step.
Once you know your clematis type, you can apply the right pruning method and provide the proper care that naturally triggers a second bloom cycle.
In this post, we’ll break down exactly how to get a clematis to rebloom, covering pruning groups, feeding strategies, and simple tricks to extend the flowering season.
Let’s dig into the secrets of a repeat-flowering clematis.
How Do You Get A Clematis To Rebloom By Pruning
The most direct answer on how to get a clematis to rebloom is to prune based on the plant’s flowering group.
Clematis are divided into three pruning groups, and understanding these is key to unlocking a second show of blooms.
If you prune at the wrong time, you risk cutting off the very buds that would have become your next flowers.
1. Group 1 Clematis Bloom On Old Wood
Group 1 clematis, like the early-flowering alpina and macropetala varieties, bloom in spring on growth from the previous year.
To get a clematis to rebloom in this group, you should avoid hard pruning altogether.
Instead, wait until after their spring bloom has finished, then lightly trim back any dead or tangled stems.
This gentle approach preserves the old wood that holds the buds for next year’s early flowers.
However, these types rarely produce a true second flush, so your rebloom efforts here are really about maintaining a healthy plant for the following season.
2. Group 2 Clematis Bloom On Old And New Wood
Group 2 clematis, which include the large-flowered hybrids, are the classic answer to the question of how to get a clematis to rebloom.
These varieties bloom in early summer on old wood and then can rebloom on new wood later in the season.
To encourage that second bloom, prune lightly in late winter or early spring, removing only dead or weak stems.
Immediately after the first flush of flowers fades, cut the plant back by about one-third, which stimulates fresh growth and a brand new set of buds.
This post-bloom trim is the single most effective trick for getting a group 2 clematis to rebloom reliably.
3. Group 3 Clematis Bloom On New Wood
Group 3 clematis, like the vigorous viticella and texensis types, bloom in late summer on the current season’s growth.
Getting a clematis to rebloom in this group is straightforward because you can cut them back hard in early spring.
Prune all stems down to about 12 to 18 inches from the ground, and the plant will send up vigorous new shoots.
These new shoots will produce a heavy bloom in late summer, and while they don’t usually rebloom again that same year, proper care will maximize the single flush they do give you.
Feeding Your Clematis To Encourage A Second Bloom
Beyond pruning, feeding is a vital part of how to get a clematis to rebloom successfully.
A clematis that has just finished a heavy bloom has used up a lot of energy, and it needs a nutrient boost to produce another set of flowers.
Using the right fertilizer at the right time can make all the difference between a sad, one-time bloomer and a repeat showstopper.
1. Use A High-Potassium Fertilizer
Potassium is the nutrient that promotes flowering in plants.
Look for a fertilizer formulated for tomatoes or roses, as these are naturally high in potassium.
Apply this feed every four to six weeks during the growing season, starting in early spring.
This regular feeding provides the steady supply of nutrients your clematis needs to produce a second wave of blooms.
2. Avoid High-Nitrogen Feeds
While nitrogen is good for leafy growth, too much of it will give you a huge, green clematis with very few flowers.
If you want to get a clematis to rebloom, steer clear of lawn fertilizers or general-purpose feeds with a high first number, like 20-10-10.
Instead, keep the nitrogen low and the potassium high to direct all the plant’s energy toward flower production.
3. Mulch And Water Consistently
Clematis roots like to stay cool and moist, which is a secret many gardeners miss.
Apply a thick layer of mulch around the base of the plant, making sure to keep it away from the stems themselves.
Water deeply during dry spells, as water stress is a common reason for a clematis to stop blooming.
This stable environment keeps the plant healthy and ready to push out that second flush of flowers you’re hoping for.
Simple Tricks To Encourage Clematis Reblooming
There are a few extra tricks you can use to get a clematis to rebloom, even beyond the basic pruning and feeding routine.
These small steps mimic natural conditions and can trick the plant into thinking it’s time to flower again.
1. Deadhead Spent Blooms
Deadheading, or removing faded flowers, is a powerful way to encourage reblooming.
When you remove the old flower before it sets seed, the plant doesn’t waste energy on seed production.
Instead, it redirects that energy into producing new growth and fresh flower buds.
Make a habit of deadheading your clematis regularly throughout the blooming season for the best chance of a rebloom.
2. Give Them The Right Light
Clematis perform best when their tops are in the sun but their roots are in the shade.
To get a clematis to rebloom, aim for at least six hours of sunlight on the foliage each day.
You can plant low-growing perennials around the base to shade the roots, or simply place a flat stone over the root zone.
This balance of sun and shade keeps the plant stress-free, which is essential for repeat flowering.
3. Perform A Mid-Summer Trim
For group 2 clematis, a mid-summer trim is a guaranteed way to get a clematis to rebloom.
About four to six weeks after the first bloom finishes, cut the entire plant back by about a third.
This might look drastic for a few weeks, but the plant will respond by sending out fresh, strong growth that sets buds for a fall display.
This quick trim is often all it takes to transform your clematis from a one-hit wonder into a season-long bloomer.
So, How Do You Get A Clematis To Rebloom?
You get a clematis to rebloom by matching your pruning to its flowering group and supporting it with proper feeding and care.
The process of getting a clematis to rebloom isn’t complicated once you understand whether your plant blooms on old wood, new wood, or both.
So, the next time you’re wondering how to get a clematis to rebloom, just remember to prune according to its group, feed it with a high-potassium fertilizer, and deadhead spent flowers.
With a little attention and these simple techniques, you can enjoy a vibrant, repeat-flowering clematis that lights up your garden for months instead of just a few short weeks.