Troubleshooting
Grayswood Pink Rock Rose problems — and how to fix them
Grayswood Pink Rock Rose (Cistus × lenis 'Grayswood Pink') is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Honey fungus (Armillaria) susceptibility
Cistus species are noted as susceptible to Armillaria honey fungus, which kills the plant from the roots upward. Symptoms include sudden wilting and creamy-white mycelial plaques under the bark at soil level. No effective chemical treatment exists; remove infected plants and roots promptly and avoid replanting Cistus in the same spot.
Chlorosis on alkaline soils
Despite tolerating chalk, established plants on highly alkaline substrates may develop interveinal yellowing (iron or manganese deficiency) as they age. Apply a chelated iron drench in spring or, if the problem persists, replace with a young plant in improved ground.
Prevent grayswood pink rock rose problems before they start
Most grayswood pink rock rose issues are care-mismatch, not bad luck. Dial in the basics:
Grayswood Pink Rock Rose problems — FAQ
Why is my grayswood pink rock rose honey fungus (armillaria) susceptibility?
Cistus species are noted as susceptible to Armillaria honey fungus, which kills the plant from the roots upward. Symptoms include sudden wilting and creamy-white mycelial plaques under the bark at soil level. No effective chemical treatment exists; remove infected plants and roots promptly and avoid replanting Cistus in the same spot.
Why is my grayswood pink rock rose chlorosis on alkaline soils?
Despite tolerating chalk, established plants on highly alkaline substrates may develop interveinal yellowing (iron or manganese deficiency) as they age. Apply a chelated iron drench in spring or, if the problem persists, replace with a young plant in improved ground.