Hey guys and gals! So the house we rent is landscaped in rock , but this year I really want a veggie garden, so I am going to build a raised garden plot. But my problem is that if/when we move some day, I don't know that our landlords would be OK with us leaving the plot behind, so I want it to be as easy as possible to scoop the dirt out, to move it. I know I can put plastic down to keep the dirt seperate from the rock, but can I just put like a piece of 3/4 in plywood on the bottom? Or will the veggie roots have issues with that? As you can tell, I was raised a city slicker Thanks!