Yeah! I have them in the regular 10x20 trays with the flat holder under them.I thought about that moving issue,too. This is what I decided. I would use them for the mothers and stick with the tried and true method that has worked for me so very long. The ole' gallon pots or bigger! To keep from damaging the root system,I tied the bags around the top,to tighten the soil ball.Works pretty good.Thank ya for getting my mindset,on the right track!