Trees will often do better out in the open ground, rather than in a pot. However they are still able to be grown in pots, and this is a method which is becoming increasingly popular. We would recommend using the very best potting mix you can find, and you need to make sure that the pot doesn’t dry out. Probably the best way of going about it, is to put a water timer on, so that the potted plant gets a regular drink. You will need to fertilise, probably with some good quality compost, or dynamic lifter, blood and bone etc. Trees most suited to pot culture include figs, dwarf nectarine and peach, dwarf apples, semi dwarf Fuyu persimmon,  and the quinces. Also try raspberries, blackberries,  and semi dwarf cherries.