Troubleshooting
Dipladenia problems — and how to fix them
Dipladenia (Dipladenia sanderi) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Root rot
Caused by overwatering or poorly draining soil. Allow the growing medium to dry slightly between waterings and ensure the pot has adequate drainage holes. Remove affected roots and repot into fresh, dry mix.
No flowers
Insufficient light is the primary cause. Move to a sunnier position with at least 6 hours of direct sun. Also check that pot is not too large (oversized containers promote root growth over blooms) and switch to a high-potassium fertiliser.
Aphids and mealybugs
Common on new growth and in the leaf axils. Wipe off mealybugs with a cotton swab dipped in rubbing alcohol; treat aphid colonies with insecticidal soap. Inspect regularly as populations build quickly in warm, dry conditions.
Prevent dipladenia problems before they start
Most dipladenia issues are care-mismatch, not bad luck. Dial in the basics:
Dipladenia problems — FAQ
Why is my dipladenia root rot?
Caused by overwatering or poorly draining soil. Allow the growing medium to dry slightly between waterings and ensure the pot has adequate drainage holes. Remove affected roots and repot into fresh, dry mix.
Why is my dipladenia no flowers?
Insufficient light is the primary cause. Move to a sunnier position with at least 6 hours of direct sun. Also check that pot is not too large (oversized containers promote root growth over blooms) and switch to a high-potassium fertiliser.
Why is my dipladenia aphids and mealybugs?
Common on new growth and in the leaf axils. Wipe off mealybugs with a cotton swab dipped in rubbing alcohol; treat aphid colonies with insecticidal soap. Inspect regularly as populations build quickly in warm, dry conditions.