Overwatering
Wet soil plus yellowing lower leaves points squarely at overwatering — the easiest way to set a heartleaf philodendron back.
Diagnosis
Overwatering
What's happening
Heartleaf philodendron likes its soil to dry partway between waterings. When the roots sit in soggy mix they can't take up oxygen, so they begin to suffocate and rot. The plant reacts by shedding its oldest leaves first, which turn a soft, uniform yellow and go limp before they drop.
How to fix it
Stop watering and let the soil dry well down. Slip the plant out of its pot and check the roots — firm, pale roots are healthy, so trim away any brown, mushy ones with clean scissors and repot into fresh, airy, well-draining mix in a pot with drainage holes. From now on, water only once the top inch or two feels dry; a heartleaf is far happier slightly dry than waterlogged.
What fixes it
- A soil moisture meter — A moisture meter removes the guesswork — only water when it reads dry an inch or two down.
If that doesn't fix it
This is general guidance based on common symptoms; individual plants vary.
Read the full Heartleaf Philodendron care guide →
Reviewed June 2026 · how we check this