I am completely new to gardening so bare with me! There is a place in front of our porch that is in desperate need of something, so I bought a pack of wild flower seed mix. I'm not quite sure how to go about planting them though. I tilled up the dirt and there are a lot of little roots. So many that I would never be able to get them all up. I was thinking I would put some landscaping fabric down to keep any weeds from popping up. Should I do fabric with garden soil on top and plant the seeds in there? Or will it be too shallow?