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Why do Phalaenopsis orchid roots develop black spots? And what does it mean if brown patches appear—what disease could it be?

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The Phalaenopsis orchid, with its unforgettable blooms, can instantly elevate the look of any home or shop. However, caring for such a beautiful flower is not always smooth sailing—the most common issue is root rot. When leaves begin to yellow, buds refuse to open, or flowers droop prematurely, these are warning signs that something is wrong.



How to recognize trouble quickly? Start with the appearance of the roots. Transparent orchid pots make it easier to observe them. If you notice “tiger stripes” or large black patches on the roots, it’s time to take action.

Tiger stripes: Roots display banded markings similar to tiger skin. This is not a natural pattern—it’s a warning sign of overwatering, much like the discomfort of overeating.

Large black patches: These dark brown or black blotches usually result from standing water left at the bottom of the pot. Excess water attracts pests and pathogens, which can eventually rot the roots if not corrected.

Sometimes the damage isn’t visible. In that case, gently touch the roots: if they feel soft, mushy, or hollow, collapsing under pressure, the tissues inside are already damaged and can no longer absorb water or nutrients.

Prevention tip: Avoid ceramic pots—choose transparent orchid pots so you can monitor root health at all times. If you see tiger stripes or black patches, act immediately by checking your watering habits and treating the affected roots. Quick action can prevent small problems from turning into major ones.

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