Rick, I use half gallon jugs too, as well as 2 liter and 1 liter plastic bottles for WS... If you get a big mass of seedlings in your container, no problem, you just divide it up into however many plants you want... the seedlings will "duke it out," and in the case of clump-forming perennials, you'll end up with a nice full looking plant much sooner (if multiple seedlings win the contest for survival). Guess what I'm saying is -- give it a try sometime when you're running out of inside space.
