I have about 15 1-3yr grafted maples that are currently in individual pots; I've done this for several reasons, one of which is that they are simply too small for me to feel confident they can withstand the extreme weather we can get here in Kansas. But, I know they will grow faster - and, likely, do better overall - if they were planted in the ground. So, I have been wondering if something like the Gronomics elevated gardens or larger planter boxes might be a good compromise (www.gronomics.com). Depending on the size of the garden/box, I would plant several maples in each. I would love to hear thoughts and opinions on this, and why it may or may not be better than having them all potted individually.