A simple midsummer trim can refresh sprawling catmint, encourage fresh growth, and help many varieties produce another wave of flowers later in the season.
Catmint Can Bloom Again With the Right Trim
August 21, 2026 – Catmint is one of those garden perennials that can look beautiful without demanding much attention. Its silvery-green foliage and purple-blue flower spikes make it a favorite for long-lasting summer color, while its ability to tolerate tough conditions makes it especially appealing for gardeners who prefer lower-maintenance plants.
But even a hardy perennial can benefit from a little attention once its first major flush of flowers begins to fade. Rather than simply leaving the plant to become increasingly sprawling and untidy, gardeners can give catmint a timely midsummer trim that encourages fresh growth and, for many varieties, another round of blooms.
According to gardening experts cited by Country Living, most catmint varieties are capable of producing a second flush after pruning. The exact timing and strength of that second display will vary depending on the variety, weather and growing conditions, but the technique is straightforward.
Watch the Plant Instead of the Calendar
One of the easiest mistakes is waiting for a specific date to prune. Catmint does not necessarily finish its first major bloom at the same time in every garden, so the plant itself should determine when you reach for the shears.
The best moment is when the first main display is visibly starting to fade. Nikki Bruner of Perfect Plants Nursery recommends pruning as soon as the flowers begin losing their initial impact, rather than waiting until the plant has fully set seed or collapsed outward.
That timing matters because the goal is to redirect the plant toward fresh vegetative growth before it becomes heavily spent. An earlier cut can also help restore a more compact shape while there is still plenty of growing season left for the plant to recover.
How Much Should You Cut Back?
The amount you remove depends on the plant’s condition and how vigorous it is. For a smaller or less vigorous catmint that simply needs a refresh, cutting away around one-third of the growth is a measured approach.
Gardening expert Angelika Zaber recommends removing roughly one-third after the first flush has faded. That leaves enough foliage in place for the plant to recover quickly while encouraging new growth that can support another display.
More vigorous plants may call for a firmer reset. If a catmint has become particularly sprawling, untidy or seed-heavy, a stronger cut can help restore its shape and encourage more even regrowth. Bruner recommends heavier pruning for the strongest second flush, particularly when the plant has clearly outgrown its tidy form.
Still, there is an important limit during summer: do not cut the plant completely down to ground level. A midsummer trim is intended to refresh the plant, not replace the full annual cleanup that is better handled in early spring.
Don’t Confuse Summer Pruning With the Annual Cutback
Catmint benefits from two different kinds of pruning, and knowing the difference can prevent an overly aggressive midsummer cleanup.
After the first round of flowers, the goal is to stimulate another period of growth and blooming. That means leaving enough healthy foliage behind for the plant to continue growing. Cutting all the way to the base during summer can remove too much of the plant’s active growth just when it needs foliage to recover.
The more substantial annual cutback belongs in early spring. Once new shoots begin emerging, the previous year’s dead growth can be removed, leaving roughly one to two inches above the crown and taking care not to damage the fresh growth.
Keeping those two pruning jobs separate makes the timing much easier to remember: trim after the first flowering period to encourage more blooms, then wait until early spring for the full cleanup.
Give the Plant Time to Recover
Pruning is only part of the process. Once catmint has been cut back, it may need some help getting through the recovery period, particularly during warm or dry weather.
The first step is simple: check the soil. If it is dry, water the plant deeply after pruning. Bruner recommends watering but skipping fertilizer, allowing the plant to focus on producing fresh growth rather than adding unnecessary feeding immediately after the cut.
Mulch can also help maintain soil moisture during dry conditions. A layer around the plant can reduce moisture loss, but it should be kept away from the crown so damp material does not accumulate around the stems.
Shape the Plant While You Prune
Catmint has a natural tendency to spread outward as its flower stems lengthen, which can make an established plant look floppy after its first flowering cycle. A midsummer trim is a good opportunity to bring those stems back into a more compact shape.
Use clean, sharp garden shears and work around the plant rather than taking everything off in one pass. Remove the spent flower stems and trim back the outer growth, keeping the healthiest foliage and stems that are still actively growing.
A tidy shape is not just about appearance. More evenly trimmed growth can encourage the plant to develop fresh shoots from multiple points, creating a fuller second display instead of a few scattered stems emerging from the center.
Deadheading Can Help Between Major Trims
If your catmint is still producing flowers but a few stems have already finished, you do not necessarily need to give the entire plant a major cut immediately. Removing individual spent flower spikes can keep the plant looking fresh while extending the first flowering period.
Deadheading also prevents the plant from putting as much energy into seed production. However, if most of the flowers have already faded and the plant is beginning to look tired, a fuller trim is generally the better approach when the goal is a second wave of blooms.
Think of deadheading as ongoing maintenance and the larger midsummer cut as a reset.
Don’t Overwater a Drought-Tolerant Plant
One reason catmint is popular in low-maintenance gardens is its tolerance for relatively dry conditions once established. That does not mean a recently pruned plant should be left completely dry, particularly if summer temperatures are high.
The key is to water according to the condition of the soil rather than following a rigid schedule. Give the plant a thorough drink when the soil has dried out, then allow excess moisture to drain away.
Catmint generally prefers well-drained conditions and can struggle when its roots remain consistently wet. After pruning, aim for enough moisture to support new growth without turning the surrounding soil into a constantly damp environment.
Sunlight Helps Fuel the Second Flush
A sunny planting location can make a significant difference in how well catmint responds after flowering. The perennial generally performs best with plenty of light, which supports both strong foliage and abundant blooms.
If a plant has become noticeably thinner or less floriferous, take a look at its surroundings. Nearby shrubs, trees or rapidly growing perennials may have begun casting more shade than when the catmint was first planted.
That does not necessarily mean the plant must be moved. Pruning surrounding vegetation may be enough to restore better light. If the area has become permanently shaded, however, the plant may never produce the same kind of flowering display it had in a sunnier location.
Avoid Feeding Immediately After the Cut
It can be tempting to add fertilizer after pruning in an effort to speed up new growth, but catmint generally does not need heavy feeding. Overfertilizing can encourage soft, leafy growth at the expense of the compact habit and flowers gardeners want.
A healthier approach is to focus first on light, appropriate watering and good soil drainage. Once the plant begins producing new shoots, its overall condition will tell you more about whether it actually needs additional nutrients.
For established plants growing in reasonably fertile soil, fertilizer may not be necessary at all. This is one of the reasons catmint can work so well in lower-maintenance perennial borders.
The Second Bloom May Not Look Exactly the Same
A successful trim can encourage another round of flowers, but gardeners should not expect the second display to be identical to the first. The timing and abundance of reblooming depend on the catmint variety, local weather and how strongly the plant was growing before it was pruned.
Some plants can produce a substantial second flush, while others may offer a lighter scattering of flowers. That variation is completely normal.
The goal of midsummer pruning is therefore not to force a guaranteed second peak. Instead, it creates better conditions for the plant to produce fresh growth and potentially flower again rather than allowing the spent stems to dominate for the rest of the season.
Leave Some Flowers for Pollinators
Although gardeners may be eager to cut back every fading flower, there is value in allowing some blooms to remain, particularly if your garden is designed to support pollinators.
Catmint’s flowers can attract bees, butterflies and other beneficial insects. If the plant is still actively flowering, you can leave some of the fresher stems untouched while removing the oldest and most exhausted growth.
This gives pollinators continued access to nectar while still keeping the plant from becoming overly untidy. A staggered approach can also make the transition between flowering cycles feel more natural in a mixed perennial border.
Spring Is the Time for the Bigger Cleanup
Once the growing season is over, resist the urge to keep making major cuts. Catmint can remain structurally useful in the garden through fall and winter, and the dried stems can provide texture as other perennials disappear.
The major cleanup should wait until early spring, when new growth begins to emerge. At that point, the previous season’s dead stems can be removed so the fresh shoots have room to develop.
This spring cleanup is different from the summer trim. The summer cut is about encouraging reblooming, while the spring cut is about removing old growth and preparing the plant for another growing season.
Catmint Is Easy to Keep Looking Its Best
The biggest advantage of pruning catmint is how little complicated maintenance it requires. Once you understand the difference between deadheading, midsummer trimming and spring cleanup, the plant becomes surprisingly easy to manage.
Watch for the first major flush of flowers to fade, then trim the plant back rather than letting spent stems dominate. Give it appropriate moisture, plenty of light and good drainage, and allow the fresh growth to develop naturally.
With the right timing, a plant that looked finished in midsummer can become full and attractive again, sometimes rewarding you with another round of flowers before the gardening season comes to an end.
Final Thoughts
Catmint does not need constant attention to remain beautiful, but a well-timed post-bloom trim can make a noticeable difference. Cutting back spent growth encourages fresh shoots, restores a more compact shape and may bring another wave of flowers later in the season.
The trick is not to overdo it. Give the plant a thoughtful midsummer haircut, support it with sensible watering and sunlight, then save the more substantial cleanup for spring. That simple routine can keep catmint looking fresh while making the most of its long flowering season.
FAQs
When should I prune catmint after flowering?
Prune catmint when its first major flush of flowers begins to fade. Trimming at that point can encourage fresh growth and potentially a second round of blooms.
How far back should catmint be cut in summer?
The amount depends on the plant’s vigor and condition. Removing roughly one-third of the growth is a good starting point, while particularly vigorous or sprawling plants can tolerate a stronger trim.
Will catmint bloom again after pruning?
Many catmint varieties can produce a second flush after flowering when they are pruned at the right time. The amount of reblooming varies depending on the variety and growing conditions.
Should I fertilize catmint after cutting it back?
Heavy fertilizing is generally unnecessary. Focus on proper watering, sunlight and drainage first, particularly because excessive fertilizer can encourage overly soft leafy growth.
When should catmint be cut back completely?
Save the more substantial annual cleanup for early spring, when new growth begins emerging. Summer pruning should leave enough healthy foliage for the plant to continue developing.
Published by HOLR Magazine