Hi Drdawg,
I think your weather is a little more reliable than ours... my greenhouse will in sunny summer days reach anywhere between 85 and 110 but the British summer does have its extremes 😏
The plumeria is currently laying in the heated tray next to the others, I did consider putting them in the greenhouse as today looks to be warm but I'm concerned about bugs and a climate change for them. So I will probably keep them indoors where they seem happy.
Thankyou for all your advice, I will let everyone know how he goes. I have been looking to see if there are any other people from the U.K. Growing plumeria but haven't found anyone so far.