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).
Soil should actually be watered well, then allowed to dry slightly.
Make the adjustments in care as indicated in the link below.