Glossary · Plant care
Signs of overwatering a plant.
The seven signs of overwatering a plant are: (1) yellow lower leaves that feel soft, not crispy; (2) drooping leaves even though the soil is wet; (3) soft mushy stems near the soil line; (4) fungus gnats flying around the pot; (5) mold or algae on the soil surface; (6) brown leaf tips with a yellow halo; (7) a sour, rotten smell from the root ball. The fix is to stop watering immediately, pull the plant from its pot, trim any black mushy roots, repot in fresh dry soil, and only water again when the top 2 inches of soil are dry. If root rot has spread, take a stem cutting and start over.
The seven signs.
- 1
Yellow lower leaves (soft, not crispy)
Roots are suffocating in waterlogged soil and can't deliver nutrients to leaves.
- 2
Drooping despite wet soil
Damaged roots can't pump water upward — looks like underwatering but the soil is soaked.
- 3
Soft, mushy stem at the soil line
Stem rot from prolonged moisture against the stem.
- 4
Fungus gnats
Their larvae live in the top 2 inches of permanently wet soil. Dry the surface and they leave.
- 5
Mold or algae on soil surface
Soil is staying wet too long. Improve airflow and let it dry between waterings.
- 6
Brown leaf tips with yellow halo
Different from the dry crispy tips of underwatering — these are soggy at the edge.
- 7
Sour smell from the soil
Anaerobic bacteria thriving in saturated soil — the warning sign before full root rot.
When the symptoms overlap.
Yellow leaves can mean overwatering, underwatering, root rot, low light, or nutrient deficiency. Without context they all look the same. Tazart's Overwater Detective takes one photo of the plant + one of the soil and tells you which of the four it actually is — so you don't water an already-overwatered plant.