I would say raised bed and greenhouse. I would think a cold frame should be attached to the ground as its floor! I have a dug out 8 by 12 area a foot deep that I put a A frame above it that is 7 foot in the middle. I have plants planted directly into the ground and chicken wire all over the oustide of the frame fo climbers! I can use it for a greenhouse or a raised bed or coldframe! Just ad plastic for a greenhouse! I may be wrong about a cold frame on the ground so let me know? Looks good!