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You can make crepe myrtles bloom again by giving them the right combination of sunlight, pruning, and feeding.
If your crepe myrtles have turned into stubborn green leafy bushes with hardly a flower in sight, you’re not alone.
Many gardeners face the same frustration when their crepe myrtles refuse to put on their famous summer show.
The good news is that coaxing crepe myrtles to bloom again is totally doable, and it usually comes down to a few simple fixes you can tackle this season.
In this post, we’ll explore why your crepe myrtles aren’t blooming, the best ways to encourage crepe myrtles to bloom again, and the common mistakes that keep those colorful panicles away.
Let’s dig in and get your crepe myrtles flowering like they should.
Why Your Crepe Myrtles Aren’t Blooming
Before you can make crepe myrtles bloom again, you need to understand what’s stopping them in the first place.
Crepe myrtles are tough, sun-loving trees, but they’re also pretty picky about a few key conditions.
If any of these are off, your crepe myrtles will focus on growing leaves instead of flowers.
1. Not Enough Sunlight
Crepe myrtles are sun worshippers, plain and simple.
They need at least six to eight hours of direct, full sun every single day to set flower buds.
If your crepe myrtles are tucked in a shady corner or blocked by a larger tree, they simply won’t have the energy to bloom.
That’s why the fastest way to make crepe myrtles bloom again is to assess their light exposure.
If they’re in too much shade, you may need to trim back overhanging branches or consider moving the tree to a sunnier spot in the fall.
2. Over-Fertilizing with Nitrogen
This is a sneaky one because it feels like you’re helping.
When you feed crepe myrtles a high-nitrogen lawn fertilizer, you’re telling the tree to grow lots of lush, green foliage.
And that’s exactly what happens, at the expense of flowers.
To make crepe myrtles bloom again, switch to a fertilizer that’s higher in phosphorus, which is the nutrient that promotes blooming.
Look for a fertilizer labeled for flowering trees, and avoid getting any lawn food near the root zone.
3. Pruning at the Wrong Time
Timing is everything when you’re trying to make crepe myrtles bloom again.
Crepe myrtles bloom on new wood, which means they form flower buds on the growth that happens in the spring.
If you prune your crepe myrtles in late spring or early summer, you’re chopping off all those future flower buds.
The safest time to prune is late winter or very early spring, before new growth starts.
That way, the tree has the whole growing season to push out new branches that will carry blooms.
Essential Steps to Make Crepe Myrtles Bloom Again
Once you’ve figured out what’s holding your tree back, it’s time to put a plan into action.
Here’s a step-by-step approach to get crepe myrtles blooming again, starting with the most important factor.
1. Maximize Sunlight Exposure
Walk around your yard and observe how much sun your crepe myrtles actually receive during the day.
If they’re getting less than six hours of direct sunlight, that’s your primary problem.
To make crepe myrtles bloom again in shady spots, you have two realistic options.
You can prune surrounding trees to let in more light, or you can transplant your crepe myrtles to a sunnier location.
Transplanting is best done in late fall or early winter while the tree is dormant, and it’s well worth the effort if it means a season full of flowers.
2. Prune Correctly and Lightly
Many gardeners make the mistake of “crepe murder,” which is hacking the tree back to ugly stubs.
This doesn’t help make crepe myrtles bloom again, it actually stresses the tree and delays flowering.
Instead, practice light pruning to encourage blooms.
In late winter, remove any suckers growing from the base, cross branches, and twiggy growth.
Also, trim off last year’s seed pods by cutting just above a side branch or outward-facing bud.
This simple act directs the tree’s energy into producing new flowering wood.
3. Feed with the Right Fertilizer
To make crepe myrtles bloom again, you need to feed them for flowers, not just leaves.
Use a slow-release fertilizer with a higher middle number, like a 3-1-2 or an 8-14-9 blend.
The middle number represents phosphorus, which is crucial for bud development.
Apply the fertilizer in early spring, just as new leaves begin to emerge.
Water it in well, and avoid getting it on the foliage or the trunk.
A light second feeding in early summer can give crepe myrtles a gentle boost, but don’t overdo it.
4. Water Deeply but Infrequently
Crepe myrtles are drought-tolerant once established, but they still need consistent moisture to bloom well.
During dry spells, give your crepe myrtles a deep soaking once a week rather than a light sprinkle every day.
Deep watering encourages strong root growth, which supports abundant flowering.
Be careful not to overwater, soggy roots can lead to root rot and will definitely prevent crepe myrtles from blooming again.
Common Mistakes That Prevent Re-Blooming
Even with the best intentions, you might be accidentally sabotaging your crepe myrtles.
Let’s look at a few more things that can stop crepe myrtles from blooming again.
1. Deadheading Spent Blooms
This one is actually a good habit, but only if you do it correctly.
Deadheading crepe myrtles, which means removing faded flower clusters, can encourage a second round of blooms in late summer.
To make crepe myrtles bloom again after the first flush, snip off the old flower heads before they form seed pods.
This signals the tree to produce new flowers instead of focusing on seeds.
2. Ignoring Pest Problems
Aphids and Japanese beetles can stress your crepe myrtles and reduce flowering.
Check the undersides of leaves for clusters of tiny insects.
If you spot pests, treat them with a strong spray of water or an insecticidal soap.
Keeping your crepe myrtles healthy is a key part of helping crepe myrtles bloom again.
3. Planting the Wrong Variety
Sometimes, crepe myrtles don’t bloom well because they’re simply not suited to your climate.
If you live in a cooler northern region, you need a cold-hardy variety that has enough time to flower before fall frosts.
If you’ve tried everything and crepe myrtles still won’t bloom again, check that your cultivar matches your growing zone.
So, How to Make Crepe Myrtles Bloom Again?
You can make crepe myrtles bloom again by focusing on sunlight, proper pruning, and the right fertilizer.
Start by giving crepe myrtles at least six hours of full sun, prune them lightly in late winter, and feed them with a phosphorus-rich fertilizer in early spring.
Avoid high-nitrogen feeds and never prune in late spring or summer.
With a little patience and these simple adjustments, your crepe myrtles will reward you with a spectacular display of vibrant blooms that lasts all summer long.
So get out there, give your crepe myrtles the care they crave, and enjoy the colorful comeback they’ll deliver this season.