Troubleshooting
Purple Dragon Dead Nettle problems — and how to fix them
Purple Dragon Dead Nettle (Lamium maculatum 'Purple Dragon') 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.
Summer heat dormancy
In zones 7–8, plants can brown and die back mid-season in high heat. Shear back to 5 cm after the main flower flush and water well; vigorous regrowth typically appears in early autumn.
Powdery mildew
Common in densely planted areas with poor air circulation, especially when soil dries at the roots. Thin clumps and maintain even soil moisture. Remove and dispose of affected leaves.
Rapid spread beyond intended area
'Purple Dragon' is a fast grower and can colonise adjacent areas. Edge plantings annually and lift excess growth each spring to maintain boundaries.
Prevent purple dragon dead nettle problems before they start
Most purple dragon dead nettle issues are care-mismatch, not bad luck. Dial in the basics:
Purple Dragon Dead Nettle problems — FAQ
Why is my purple dragon dead nettle summer heat dormancy?
In zones 7–8, plants can brown and die back mid-season in high heat. Shear back to 5 cm after the main flower flush and water well; vigorous regrowth typically appears in early autumn.
Why is my purple dragon dead nettle powdery mildew?
Common in densely planted areas with poor air circulation, especially when soil dries at the roots. Thin clumps and maintain even soil moisture. Remove and dispose of affected leaves.
Why is my purple dragon dead nettle rapid spread beyond intended area?
'Purple Dragon' is a fast grower and can colonise adjacent areas. Edge plantings annually and lift excess growth each spring to maintain boundaries.