By "pests" are you refering to 4 legged pests or 6-8 legged pests? For rabbits and such, I have dogs and traps. For insects- long story: I try to use insecticidal soap and I have a garden that has been in place for several years, if I have an infestation of something serious that is tough to get rid of and nothing else works I use Sevin(carbaryl-I think) VERY sparingly. I also fight slugs/snails with beer cantraps and a little epsom salts(good for the soil here too). It has taken me quite a while to get all of the critters that like my veggies to leave them alone long enough for me to enjoy them. We have to use electric fencing,dogs,shotguns etc. to keep them under control. you should be OK though - they don't start forming actual "brussel sprouts" for a while- you should have plenty of time to get them under control! Good luck!