I don't think they will over grow themselves. I restricted them in 2 gallon pots. I grew 24c before it didn't get that big in a 3 gallon so a 2 so far has been OK. I did have a plan to give 2 away but it fell through. Still I think they will be OK. I know gbd ran a shit ton of sc side by side in like 2-2.5 gallon pots. Can't say I'm as good as he is, but a guy has to try right.