I live in England and I have a few plumerias that seem to be dormant even in the summer. They are 1-2 seasons old and I keep them either in the greenhouse or indoors. I have kept the soil slightly damp and I have given them plumeria food. Please can you advise where I may be going wrong. Thank you. I must be doing something right though as I have one plumeria plant out in flower and another plant is 5 foot tall with branches (grown from seed - this one is approx 5 years old but as yet no flowers). Andy Ford
Soil should actually be watered well, then allowed to dry slightly.
Make the adjustments in care as indicated in the link below.