I'm not exactly sure what it's called--but it's that black stuff that you put down in the beds to keep the grass from growing. Sarah and I are starting her first flower bed, and I've taken all the grass out of the area where I want the bed. Only thing is, we're planting seeds. Do I put roundup on the area to kill any remaining grass and then wait to plant the seeds, or do I put the seeds in the ground and keep the black stuff off until they've sprouted, taking the chance that some of the grass could grow back? Help me out here. I'm no gardening expert. I have two wisteria bushes and 5 daylillies in the area that I found on clearance last year. They're doing fine, and I don't want to kill them. But DH wants me to make the bed there because he doesn't want to weed-eat around them. It's too much trouble. Thanks.