Why You Can't Buy St. Augustine Seed—and How to Thicken Your Lawn Anyway

Many homeowners ask for St. Augustinegrass seed to fill thin spots, but it doesn't exist commercially. This hybrid grass produces mostly sterile seed heads in summer. Since seeding isn't an option, focus on cultural practices: fertilize based on soil test results, water deeply but infrequently, and mow at the proper height.

Sunlight is critical—St. Augustine thins in shade. Use herbicides with extreme caution; this grass is notably sensitive to many weed killers. A thick, healthy stand achieved through good management is your best defense against weeds and bare patches.