Mealybugs
Little tufts of white cotton tucked into the leaf joints and stem nodes are mealybugs.
Diagnosis
Mealybugs
What's happening
Mealybugs are soft, sap-sucking insects that hide in the protected crooks where leaves meet the vine. They drain the plant's sap, which weakens growth and leaves a sticky honeydew residue behind, and they multiply quickly in the warm, sheltered tangle of a trailing heartleaf if left unchecked.
How to fix it
Isolate the plant from your others right away. Dab every visible bug with a cotton swab dipped in rubbing alcohol to kill it on contact, then spray the whole plant — stems, nodes, and both sides of every leaf — with insecticidal soap. Repeat the spray every five to seven days for several weeks to catch newly hatched crawlers, and keep checking the leaf joints, since mealybugs love to hide and return.
What fixes it
- Insecticidal soap — Insecticidal soap coats and kills mealybugs and their crawlers without harsh chemicals indoors.
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