Most houseplant problems are solvable at home. Overwatered soil, a pot that’s too small, a windowsill that’s too dark – these are well-documented issues with clear, practical fixes. But some problems sit outside the reach of standard houseplant care advice, and attempting a DIY fix on a seriously diseased or infested plant can waste weeks, spread pathogens to neighbouring plants, and still end in failure. Knowing exactly where that line falls is worth understanding before you lose a plant you’ve grown for years. This guide uses a Symptom – Cause – Fix structure to help you distinguish between what’s manageable…
