My raised bed, made with blocks just like yours, is in a kidney shape and is also two rows high. It is slightly mounded in the center since I did as you did and filled it extra full. I am thinking of getting more bricks and adding a row in the center to give it a two tier effect. I would only have to dig up what sits in the middle which are pretty much just lilies and Lemon Chiffon peony. Not sure if I would dig LC up. May have to give the bed a inroad divit to go around that plant.
