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How to prevent houseplants from damaging the carpet
Keep all houseplant pots in an impermeable saucer.
The most effective step you can take to prevent carpet damage is to place all pots onto a dish or saucer. Plant pots are designed to let excess moisture slowly drip out of the drainage hole at the bottom of the pot, which poses a risk to carpet and other surfaces.
Allowing this water to collect on a glazed plate or dish and then evaporate into the air will protect your carpet from water damage. Do not overfill your houseplant pots.