Troubleshooting
Herald Trumpet Vine problems — and how to fix them
Herald Trumpet Vine (Beaumontia grandiflora) 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.
Failure to flower
Most common cause is insufficient light or an absent winter dry rest. Ensure at least 6 hours of direct sun and reduce watering markedly from autumn through winter.
Mealy bugs
White cottony masses in leaf axils. Dab individual colonies with rubbing alcohol on a cotton swab; treat larger infestations with neem oil.
Scale insects
Brown waxy scales on stems reduce plant vigour. Scrub off with a soft brush or apply horticultural oil in late winter.
Frost damage
Frost-sensitive; even a light frost can cause severe dieback. In frost-prone climates, grow in a large heated greenhouse or conservatory.
Root restriction in containers
Flowers best when slightly root-bound but will suffer if seriously pot-bound. Repot every 2-3 years into the next size container in late winter.
Prevent herald trumpet vine problems before they start
Most herald trumpet vine issues are care-mismatch, not bad luck. Dial in the basics:
Herald Trumpet Vine problems — FAQ
Why is my herald trumpet vine failure to flower?
Most common cause is insufficient light or an absent winter dry rest. Ensure at least 6 hours of direct sun and reduce watering markedly from autumn through winter.
Why is my herald trumpet vine mealy bugs?
White cottony masses in leaf axils. Dab individual colonies with rubbing alcohol on a cotton swab; treat larger infestations with neem oil.
Why is my herald trumpet vine scale insects?
Brown waxy scales on stems reduce plant vigour. Scrub off with a soft brush or apply horticultural oil in late winter.
Why is my herald trumpet vine frost damage?
Frost-sensitive; even a light frost can cause severe dieback. In frost-prone climates, grow in a large heated greenhouse or conservatory.
Why is my herald trumpet vine root restriction in containers?
Flowers best when slightly root-bound but will suffer if seriously pot-bound. Repot every 2-3 years into the next size container in late winter.