I grew up in FL and always wanted to grow apples, peaches, pears, cherry. Citrus was boring. I thought about putting up greenhouse around an apple tree in winter and turning it into a freezer. That takes too much electricity, so I moved to NC, and now I can grow everything but citrus; oops, I found out I can throw plastic over short grafted citrus trees and stick small space heaters in with them. I think it's easy to heat something in winter just enough to keep it alive than to have to freeze something throughout winter in a tropical climate.