Setting up my first earthbox and would like to ask if a level must be used to position them? How critical is level as long as they appear level to the eye. I am placing them on a bed of hardwood mulch; no casters on them, just the boxes. I will not be able to shift them once they're filled.

Am I supposed to fill bottom with water before filling with potting mix? I think I remember reading on the old earthbox forum the potting mix that goes into the corners must be moist to begin with so that wicking occurs. No instructions came with them and the earthbox forums are no longer available. Hope it's OK to ask here.

Any advice deeply appreciated.

My thanks, Mary