I so wish I had read these comments before my purchase. I just planted, Olde English Nostalgia roll out. I did cover them with top soil. Just reading about the birds made me so sad and fearful. We have quail and other birds, so I'm debating on pulling them up. I love watching the quail and would do most anything to protect them.
After following the directions for laying the flower mat, I went inside and returned only to find that 2 birds, some kind of small bird and a small woodpecker, had been tearing up the mats trying to get at the seeds. They were both near the flower bed in the grass. They died a short time later. The seeds are embedded in wood shavings and sprayed with a dye. The birds choked and/or died from the dye. This is a horrible product! It made me sick that it killed these poor birds.