I had this tree for 3 years in a 5 gallon nursery pot. I got tired seeing it in one this year so i repotted it in one of the extra pots i had around. Feeding: thats a good question. They eat like well a teenager. I did notice they love acidic mixture, feeding program is about every 2-3 weeks of an organic fertilizer. I use a similar mix that Boon uses but with tea bags. Around August - September I switch to a 0-10-10 mixtures for heavy winter/spring blooms. Yes, I do get 3 blooms every year. I trick i found was to keep them cool as long as possible (but get only white flowers not the pinkish color) and once they are done blooming pick off the flower head. This bonsai has its first blooms around Christmas time and has kept blooming until now. I hope that helps.
Best,
Tom