hmm interesting about 2 ft wide and 6 ft long?? well if your using 12-20 qt potters id say at most your looking at 8-10 plants and thats going to be a tight squeeze in there, more realistic would be just keeping it to 6-8 plants but it all depends on your plant potters size and how big your planning on letting your plants get. smaller plants smaller potters big monster plants gonna have to have big monster potters.