Do you cut off dead flowers from the trumpet plant?
When the flowers on my trumpet plant are finished do l remove them or let them go the full course and let them fall off naturally?
Certified GKH Gardening Expert
It depends on if you would like seeds or not. If you don't, then just deadhead them. If you do, then let them mature.
This article will give you more information on their care: https://www.gardeningknowhow.com/ornamental/vines/trumpet-vine/growing-trumpet-vines.htm