St. Augustine grass seed is rarely sold as seed — you buy it as sod or plugs instead
St. Augustine grass does not produce viable seed in most climates, which is why you will not find bags of St. Augustine seed at garden centers the way you find fescue or bermuda. The grass flowers, but the seeds do not germinate reliably. Instead, growers and homeowners propagate St. Augustine through vegetative propagation: laying down sod (rolls of mature grass with soil attached), planting plugs (small rooted pieces), or spreading stolons (runners that root as they spread).
If you see a product labeled "St. Augustine grass seed," it is either mislabeled, a blend that contains a small percentage of St. Augustine mixed with other grasses, or a specialty product with treated seeds that have a very low germination rate. The practical route is sod or plugs, both of which are available from landscape suppliers, some big-box garden centers, and local sod farms.
Key Takeaways
- St. Augustine grass is sold as sod or plugs, not seed, because the seed does not germinate reliably in most regions.
- Sod gives you an when ready lawn but costs more and requires when ready installation and watering; plugs are cheaper but take weeks to fill in.
- Local sod farms and landscape supply companies are the most reliable sources and often deliver or hold product for pickup.
- St. Augustine thrives in warm climates (zones 8 to 11) and struggles in cold winters, so confirm your region before ordering.
Sod: the fastest way to install St. Augustine
Sod is mature St. Augustine grass grown on a farm, cut into rolls or squares with soil and roots intact, and delivered or picked up ready to lay. It establishes a full lawn in days rather than weeks. You unroll it on prepared soil, water it heavily for the first two weeks, and the roots knit into the ground beneath.
Sod costs more upfront — typically $0.50 to $1.50 per square foot depending on your region and the farm — but you avoid the wait and the bare-ground phase. Buy from a local sod farm or landscape supplier; they know the soil and climate of your area and can tell you when to plant (usually spring or early fall in warm regions). Call ahead to confirm they have St. Augustine in stock and arrange delivery or pickup, because sod must be laid within 24 to 48 hours of cutting.
Plugs: the budget option that takes longer
Plugs are small rooted sections of St. Augustine grass, usually sold in trays of 18 to 50 pieces. You plant them 6 to 12 inches apart in prepared soil, water them regularly, and they spread via stolons over 6 to 12 weeks to fill in the gaps. Plugs cost $0.10 to $0.30 each, making them far cheaper than sod for large areas, but the lawn is not usable until the grass has filled in.
Plugs are sold at garden centers, landscape suppliers, and online retailers that ship to warm-climate states. Lowe's and Home Depot carry them seasonally in spring and early summer in regions where St. Augustine grows. Plant them in spring or early fall when soil is warm and rain is regular; summer planting requires constant hand-watering. Keep the soil moist for the first four weeks while roots establish.
Stolons: free propagation if you have an existing lawn
If you already have St. Augustine grass, you can propagate it yourself by cutting stolons (the horizontal runners that root at the nodes) and laying them on prepared soil. This is free but labor-intensive and works best on small areas. Mow your existing lawn short, cut 4- to 6-inch sections of stolon, lay them on moist soil, and keep them watered until they root — usually two to three weeks.
This method is practical for filling in bare patches or expanding a lawn into an adjacent area, but not for starting from scratch in a large space. The success rate depends on soil moisture and temperature; dry soil or cold weather will kill the stolons before they root.
Where to buy sod and plugs
Local sod farms are the best source because they grow grass suited to your exact region and can advise on timing and installation. Search "sod farm near me" or ask your county extension office for a list. Landscape supply companies (often listed under "landscape materials" or "nursery supplies") also stock both sod and plugs and often deliver.
Big-box retailers like Lowe's and Home Depot carry plugs seasonally in spring and early summer in warm states; sod availability varies by location and season. Online retailers ship plugs to most warm-climate states but not sod, because it is too heavy and perishable. Nurseries and garden centers in your area may special-order either product if they do not stock it.
Climate and timing matter more than source
St. Augustine thrives in USDA zones 8 to 11 (roughly the coastal Southeast, Gulf Coast, and southern California). In zone 8, it goes dormant and turns brown in winter; in zones 7 and colder, it dies. If you live outside this range, St. Augustine will not survive, so confirm your zone before spending money on sod or plugs.
Plant in spring (March to May) or early fall (August to September) when soil is warm and rain is regular. Summer planting is possible but requires daily watering in heat. Winter planting in cold zones is pointless; the grass will not root before frost kills it.
Cost comparison: sod vs. plugs vs. seed alternatives
| Method | Cost per square foot | Time to full lawn | Installation effort |
|---|---|---|---|
| Sod | $0.50–$1.50 | Days to 2 weeks | High (heavy, must lay when ready) |
| Plugs | $0.10–$0.30 per plug | 6–12 weeks | Medium (dig holes, plant, water) |
| Stolons (DIY) | Free (if you have source) | 4–8 weeks | Medium (cut, lay, water) |
| "St. Augustine seed" (low viability) | $20–$50 per bag | Unpredictable | Low (scatter and water) |
Frequently Asked Questions
Can I really not buy St. Augustine grass seed anywhere?
True seed is not commercially available because St. Augustine seed does not germinate reliably. Products labeled "St. Augustine seed" exist but have very low germination rates and are not worth the cost. Sod and plugs are the standard and reliable methods.
What if I plant St. Augustine seed and it does not grow?
Expect poor results. Even treated seed has germination rates below 50 percent in most cases. If you have already bought seed, you can try it on a small test area, but budget for sod or plugs to fill in the gaps or start over.
How much does it cost to sod a 1,000-square-foot lawn?
Sod typically runs $500 to $1,500 for 1,000 square feet, depending on your region and whether you install it yourself or hire labor. Plugs for the same area cost $100 to $300 but require six to twelve weeks to fill in and more frequent watering during establishment.
Can I order St. Augustine sod online and have it shipped?
Most online retailers do not ship sod because it is heavy, perishable, and must be laid within 48 hours of cutting. Order from a local sod farm or landscape supplier instead. Plugs can be shipped by some online retailers to warm-climate states.
What is the best time of year to plant St. Augustine?
Spring (March to May) and early fall (August to September) are ideal because soil is warm and rainfall is regular. Avoid winter in cold zones and mid-summer heat unless you can water daily. Your local sod farm can tell you the best window for your specific area.