We have been talking a lot about how much stuff plants suck up from soil. I really want to do raised beds in my greenhouse this year. For a multitude of reasons. Before the greenhouse was here it was the metal junkyard. We put all the metal scraps and I’m pretty sure some other shit would have gotten spilled in the area. I feel like this is a non-negotiable problem for doing anything in the ground. Am I right? Sure would be awesome to get the extra height by sinking them in the ground.