Grass plugs and seed are great tools for filling in bare, damaged spots or for creating an entirely new lawn from scratch. Although the best time of year to plant grass seed and plugs largely depends on where you live and the climate you live in, generally speaking, spring is the best time to plant warm season grass seed and grass plugs. Start the spring season off with a beautiful lawn this year with our selection of grass seed and plugs. Lastly, it should be noted that St. Augustine grass can only be installed in a vegetative fashion: either by laying sod or planting grass plugs—not seed. Read more.