I got a few plants in 20 gallon plastic buckets. I cut the bottom open so if the roots grew past the pot they would get more root space. I thought the pots were getting too hot hot so I decided to build the sides up with dirt. It seems like my plants arent growing that well. They've been like this for a month, and only grew about 4 inches. Has anyone ever done this? Should I just take the dirt off the sides?