Did you start them in "solo cups", or the containers they're in now? You always want to start small then transplant into a larger container, that way your root ball development can be much more compact. I know you have VERY limited space, but if you go from a solo cup to a one or two gallon container I think your plants will be more fruitful in the end. I am on my fourth grow in soil and the number one piece of advice I can give anyone starting out is that its all about the root ball health. Guys correct me if I am wrong. GL!