Overwatering Is Not About Water

Overwatering is the most misunderstood phrase in houseplant care, because it sounds like it means giving a plant too much water at once. It does not. You can pour water through a well-drained pot until it runs freely out of the bottom and that plant has not been overwatered at all.

Roots need oxygen. In a healthy pot, water passes through and drains away, pulling fresh air into the gaps behind it. Overwatering means those gaps stay full of water for too long, the roots suffocate, and the dead tissue is then colonised by opportunistic fungi. That is root rot. It is a drowning, not a flood.

This is why frequency matters far more than volume, and why the standard advice to give a plant a fixed amount every week is unhelpful. A thorough soak followed by a genuine drying period is closer to what most houseplants evolved with than a small measured drink every few days, which keeps the middle of the root ball permanently damp.

It also explains why the same plant can be overwatered in winter on a routine that was perfectly fine in July. Less light and lower temperatures mean less growth, less water use, and soil that stays wet far longer. The watering did not change. The plant did.

The practical version: check the soil rather than the calendar, water thoroughly when it is time, and make sure the water can actually leave.