Potted tropical fruits in temperate clime greenhouse
My house has a greenhouse attached which has been pretty much empty and so I thought I would grow some tropical fruits in it. I am starting with Lychees and Sugar Apple which I understand will fruit in pots. What I want to get an idea of is what kind of conditions these plants will be happiest in.
The greenhouse can get pretty cold in the winter, down to 40F. Note I am not heating it, it is off the basement (a rather odd greenhouse). In the summer it gets ridicuolously hot, so my plan was to move the pots out in mid-May and put them back in mid-Sept. I have been told that these tropical plants like humidity a lot, so I was planning on having some humidifying setup in the greenhouse, like some evaporating trays or something to up the humidity. This is one thing I would like to know how to do. I have one of those drip irrigation systems with a timer that I can use to water the pots, and I was also going to run some water into some trays to up the humidity. Does this overall sound like a happy situation for these plants? My goal is to get some fruit off of them, and my understanding is that is difficult if they are not happy with the conditions.
The last thing I was wondering about is if anyone had experience with these two plants in terms of what kind of soil, fertilizer etc they prefer in their pots, and how frequently and how much to water.