Bonsai leaves turning yellow? The bonsai doctor
Spot the problem by its symptom and find the fix.
Bonsai doctor
Bonsai leaves turning yellow: find the cause and fix it
Some or many of your bonsai's leaves turn pale green to yellow and often drop. Sometimes only the old inner leaves are affected, sometimes the young ones at the tips.
Mould on bonsai soil: harmless or dangerous?
White, cotton-like fluff or a fine web of threads is growing on your bonsai's soil. Sometimes the soil also smells musty.
Spider mites on bonsai: how to spot and get rid of them
The leaves or needles are finely speckled with pale dots and look dull, and fine webbing hangs between the twigs. Tapping a branch over white paper reveals tiny crawling dots.