Houseplant clinic : what are the brown patches on my prickly pear ?
Corking is the most likely culprit, but it could be scale insects or fungus. Here’s how to check What’s the problem? My prickly pear (Opuntia) cactus is developing raised brown patches on both sides of the stem that are spreading, though the plant is still growing. Should I be worried? Diagnosis (…)
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The Guardian
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