Greenhouse every time but that depends on what strain that you want.I have been doing some greenhouse strains for the last 6 months or so and to me trainwreck has to be the no1 choice for a new grower.This strain has ammazed everyone who has seen it never mind smoked it covered in crystals nice strain.But if i had to point any new grower looking for a strain that would not bore them for ages it would be the greenhouse mix pack containing.Trainwreck,The cheese,Lemon skunk,Great white shark,White rhino.All these strains are massive producers if grown right.