This bed contains one row of chard along the long end of the bed. I plant at about 9" centers. Last year I put in two rows, but I think the other row wasn't doing much as it was shaded too much by the broccoli. And as you can see one row of chard is more than enough. Dare I say too much? I suppose not though if I can keep getting rid of the extras. As long as someone is eating it. Oh and as I was picking the chard I was noticing how much dirt had splashed up on it. So I'm experimenting. I put some salt marsh hay on one side of the row and not on the other. I'm hoping the slugs don't take up residence. I often forgo mulches to keep them down.