Troubleshooting
Walker's Low Catmint problems — and how to fix them
Walker's Low Catmint (Nepeta racemosa 'Walker's Low') 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.
Mid-season flop and open centres
Even this tidy cultivar opens up after the first flush. Shear the entire plant back by a third to half to renew compact, dense regrowth and a fresh bloom flush.
Powdery mildew
White film in humid, crowded conditions. Improve airflow, remove affected growth, and avoid overhead watering to keep foliage dry.
Root and crown rot
Wilting and yellowing in heavy, wet soil. Provide sharp drainage and never allow the crown to stand in water, especially over winter.
Cats flattening the clump
The catnip-like aroma attracts cats that roll on it. Shield young plants with a low support or cage until well rooted and bushy.
Prevent walker's low catmint problems before they start
Most walker's low catmint issues are care-mismatch, not bad luck. Dial in the basics:
- Common raceme catmint problems — the species this cultivar belongs to
- Common walker's low catmint problems — our other guide for the same plant
- What's wrong with my plant? — the diagnosis apps compared
- Walker's Low Catmint watering schedule
- Walker's Low Catmint light requirements
- Best soil mix for walker's low catmint
- Walker's Low Catmint temperature & humidity
- Full walker's low catmint care guide
Looking for walker's low catmint in general rather than its problems? Read the full walker's low catmint care guide — light, water, soil and feeding.
Walker's Low Catmint problems — FAQ
Why is my walker's low catmint mid-season flop and open centres?
Even this tidy cultivar opens up after the first flush. Shear the entire plant back by a third to half to renew compact, dense regrowth and a fresh bloom flush.
Why is my walker's low catmint powdery mildew?
White film in humid, crowded conditions. Improve airflow, remove affected growth, and avoid overhead watering to keep foliage dry.
Why is my walker's low catmint root and crown rot?
Wilting and yellowing in heavy, wet soil. Provide sharp drainage and never allow the crown to stand in water, especially over winter.
Why is my walker's low catmint cats flattening the clump?
The catnip-like aroma attracts cats that roll on it. Shield young plants with a low support or cage until well rooted and bushy.