Troubleshooting
Garden Catmint problems — and how to fix them
Garden Catmint (Nepeta × faassenii) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Flopping after first bloom
Cut plants back by half immediately after the first flowering flush (typically early summer) to encourage a compact second flush of bloom and tidy growth.
Powdery mildew
Appears in warm, humid conditions with poor air circulation. Choose resistant cultivars, space plants adequately, and cut back affected stems.
Cat damage
Cats roll in and chew plants due to nepetalactone attractants. Protect young plants with wire cloches until established; mature plants usually recover quickly.
Prevent garden catmint problems before they start
Most garden catmint issues are care-mismatch, not bad luck. Dial in the basics:
Looking for garden catmint in general rather than its problems? Read the full garden catmint care guide — light, water, soil and feeding.
Garden Catmint problems — FAQ
Why is my garden catmint flopping after first bloom?
Cut plants back by half immediately after the first flowering flush (typically early summer) to encourage a compact second flush of bloom and tidy growth.
Why is my garden catmint powdery mildew?
Appears in warm, humid conditions with poor air circulation. Choose resistant cultivars, space plants adequately, and cut back affected stems.
Why is my garden catmint cat damage?
Cats roll in and chew plants due to nepetalactone attractants. Protect young plants with wire cloches until established; mature plants usually recover quickly.