The 2-litres should be just fine. What you're describing is known as a Sea Of Green (SOG). Basically it just means you grow many freshly-rooted (1-2 weeks) clones packed together as tight as possible to produce X number of large colas. The lower branches which yield only popcorn nugs are often pruned after the first week or two of flower.

Sounds like a cool idea. Just make sure you light-proof the bottles so light doesn't get to the roots. :thumbsup:
canuck grower Reviewed by canuck grower on . If I... Got alot of pint water bottles around. Can't help but want to cut the top of em fill em with Verm and Perlite and poke holes for drainage and set like 20 of these in a plastic tray and use it as a fill and drain system. Just do a bunch of mini plants, do you think you'd get good buds?? Or would they need to be spaced more. Or I want to utilize my 2 liter bottles hehe. Rating: 5