Name: Mary My little patch of paradise (Zone 7b) Gardening dilettante, that's me!
Nah...I just did the cardboard/newspaper as the very top layer of what I put in the bed. The grass and whatever weren't necessarily even throughout -- it was just wherever it landed when I tossed it in. I wound up with 2-3 inches of soil over the newspaper/cardboard, but the roots of the plants can push through the paper/cardboard and find plenty of room to grow deeper if they want. I have daylilies in my bed, and this is one that I bought in Feb, planted in the bed in late Feb/early March, and dug up to relocate in late May. I'm thinking it had no complaints about the soil only being 2-3 inches deep.
Northwest Georgia Daylily Society I'm going to retire and live off of my savings. Not sure what I'll do that second week. My yard marches to the beat of a bohemian drummer...