Hi Scifi and welcome to the forum.
Avocados love water but they don't like to sit in it (no wet feet). So give them plenty of water but make sure they are draining well. They also like fertilizer, I've found chicken manure to be the best so far. Most avos will tolerate the cold for a while but not for long so I would stick them outside as much as you can. My dad has a grove here in So. Cal. and we occaisonally will dip into the low 30s for a few nights. If it lasts too long they start to go into shock, so my dad turns the sprinklers on to warm them up (the water is in the 50s so it brings the temp up).
I hope that helps. Come back and chat sometime.