Williebounce,

If you start with a decent size container for a small plant like I do, you'll have to be on top of the watering. You'll have to make sure that soil drainage is excellent. You can also water with a sprayer at first to wet only the root area and not the entire pot. The root area of the small plant will dry out sooner than the entire pot. I put the seeds in those plastic red and blue supermarket cups and then transplant to a permanent container. I only transplant that one time. I prefer to stay on top of the watering instead changing pot sizes. As far as the size the pots, you'll have to figure out how many plants you want to grow and what pot size you will use for them to fill up your grow area. Good Luck