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Keeping your clematis blooming is all about understanding its specific growth cycle and giving it the right care at the right time.
If you’ve been scratching your head wondering how to keep your clematis blooming, the secret isn’t a miracle fertilizer, it’s knowing which pruning group your plant belongs to.
The main reason people fail to keep their clematis blooming is that they prune at the wrong time, cutting off the very wood that would have produced flowers.
Another huge factor is that they don’t provide the right soil conditions, and clematis are very particular about their roots staying cool and moist.
In this post, we’ll break down exactly how to keep your clematis blooming with simple, actionable steps that work for any variety.
We’ll cover the three pruning groups, the best feeding schedule, and the planting tricks that make a world of difference.
Let’s dig in and get those vines covered in blossoms.
How To Keep Your Clematis Blooming By Pruning Correctly
The single most important answer to how to keep your clematis blooming is to prune according to its group, because each group flowers on different growth.
If you prune a Group 3 clematis in spring, you’ll delay but not remove its flowers, while cutting a Group 1 variety hard will cost you a whole season of blooms.
To keep your clematis blooming reliably, you need to identify your plant first.
1. Group 1: Early Spring Bloomers
These are the earliest clematis, like alpina and macropetala, that flower on last year’s old wood.
To keep your clematis blooming in this group, you simply don’t prune them in early spring.
Wait until right after they finish flowering, then do a light tidy-up if needed.
The key here is that the flower buds formed the previous summer.
So, if you want to keep these clematis blooming, don’t cut the stems before the show starts.
2. Group 2: Large-Flowered Summer Bloomers
This is the most common group, including the big, showy hybrids like ‘Nelly Moser’ and ‘Jackmanii’.
These bloom in two waves, first on old wood in early summer, then on new wood later in the season.
To keep your clematis blooming twice, prune them lightly in late winter.
Just remove dead stems and cut back to the highest pair of healthy buds.
After the first flush fades, give them a harder trim back by about a foot to encourage a second round of flowers.
This deadheading trick is one of the easiest ways to keep your clematis blooming all summer long.
3. Group 3: Late Bloomers
These varieties, like viticella and texensis, bloom on new growth that emerges in spring.
They are the easiest to manage if you want to keep your clematis blooming profusely.
In late winter or early spring, cut them all the way down to about 12 inches from the ground.
They will grow rapidly and produce a massive display of flowers from midsummer to fall.
Pruning hard like this is the best strategy to keep these clematis blooming, as it encourages vigorous new stems that are covered in buds.
Feeding And Watering To Keep Your Clematis Blooming
Beyond pruning, your feeding and watering routine plays a massive role in how many flowers you get.
To keep your clematis blooming, you must treat them like the hungry, thirsty plants they are.
1. Deep Watering Is Essential
Clematis hate dry roots, and inconsistent moisture is a top cause of bud drop.
To keep your clematis blooming, water deeply at the base at least once a week.
During hot, dry spells, you may need to water twice a week.
Always aim for the soil, not the leaves, to prevent fungal diseases.
2. Mulch To Keep Roots Cool
Clematis love to have their heads in the sun but their feet in the shade.
To keep your clematis blooming, add a thick layer of mulch around the base.
You can use wood chips, straw, or even a layer of small stones.
This keeps the soil cool and moist, which is exactly what the roots need to produce abundant flowers.
3. Feed With A High-Potassium Fertilizer
Fertilizer is the fuel for blooming, and nitrogen-heavy feeds will just give you leaves.
To keep your clematis blooming, use a fertilizer that’s higher in potassium, like a tomato feed.
Start feeding in spring when the shoots appear, and continue every 4-6 weeks until the end of July.
Stop feeding after that so the plant can harden off for winter.
Planting Techniques That Help Keep Your Clematis Blooming
If you’re planting a new clematis or replanting one that’s struggling, getting the basics right is how to keep your clematis blooming for decades.
The depth and location of your plant are more important than you think.
1. Plant Them Deep
You should plant clematis so that the crown is at least 2-3 inches below the soil surface.
This encourages multiple stems to grow from below ground, which protects against clematis wilt.
It also promotes a bushier plant with more flowering shoots.
This small trick is a surefire way to keep your clematis blooming with more vigor.
2. Give Them Sun on Top, Shade at the Base
Most clematis need at least six hours of sun to flower well.
However, the base of the plant should be shaded.
Plant a low-growing shrub or perennial in front of the clematis crown.
This will keep the roots cool while allowing the vine to bask in the sun.
This simple planting design is how to keep your clematis blooming when you don’t have a naturally shady spot for the roots.
So, How To Keep Your Clematis Blooming?
Keeping your clematis blooming is achievable when you match your care to the plant’s growth cycle.
The biggest secret is knowing your pruning group and cutting at the correct time, so you never accidentally remove the flowering stems.
Combine that with deep watering, cool roots, and a high-potassium feed, and you’ll have a vine covered in flowers.
Don’t forget to deadhead spent blooms and give Group 2 types a summer prune for a second show.
With these simple habits, you’ll keep your clematis blooming from late spring all the way into autumn, year after year.