I bought some turfgrass seeds from the Supermarket. What kind of turfgrass are those and how do I plant them?
There are some species of Bermudagrass that can be planted from seeds. These probably are those Bermudagrass. Just like you do with ornamental trees; you would have to nurse the seeds in a nursery and propagate them onto your lawn. Just preparing the soil on your lawn and throwing the seeds on them may not work because the seeds would be tiny and would have a low chance to survive.