Q.My plumeria fell and has a jagged gash
Can I leave it or should I cut it below the gash? This final fall broke the flowering limb. I’ve prepared it for drying and will plant it once that’s done. The gash can’t be cut straight without cutting the other limbs. What’s your recommendation?
First I would support the plant to reduce the weight to the one side.
Allow the wound to heal naturally. Watch for insects or disease. Neem Oil can be used on the wound if you see any signs of problems.
This could be a good time to take cuttings and start new plants but I would only choose that option if they plant starts to suffer.
https://www.gardeningknowhow.com/ornamental/flowers/plumeria/growing-plumeria.htm