The labels on grass seed all look pretty much the same and by law must contain consistent information. The label lists the percentage of each seed by weight, its name, place where it came from, and what percent of the seed you can expect to sprout. In addition, the label tells you what percentage of weed seed and inert matter the package contains and when the seed was tested for germination. The most important things to look for are improved varieties, current-year test date, and weed content of less than 1 percent.