Georgetown lawn grass types
What grass type is in a typical Georgetown lawn?
St. Augustine is the dominant grass in Georgetown's established neighborhoods. Bermuda is common in new builds and full-sun yards, and Zoysia is increasingly popular in higher-end HOA communities. If you are not sure which you have, blade width and mow height sort it out quickly. Texas A&M AgriLife Extension — St. Augustinegrass
Most established Georgetown yards run St. Augustine; newer master-planned sections lean Bermuda; and Zoysia shows up where an HOA wants a dense, slow-growth look. The visual differences below are the fastest way to confirm what is actually under your feet. If you are starting a new lawn or switching grass types, sod installation is how that change usually gets made here, since seed struggles to establish on slow-draining clay.
Why does Williamson County soil matter for your lawn?
Georgetown sits on slow-draining clay. West of I-35 it is clay weathered from limestone (the Georgetown soil series), with bedrock often one to three feet down; east of I-35 it is deep Blackland clay. Both are very low in permeability, so they compact and drain slowly, and core aeration matters more here than in sandy-soil markets. Aerate in spring or early summer while the grass is actively growing. Texas A&M AgriLife Extension — St. Augustinegrass
Core aeration that pulls 3 to 4-inch plugs relieves the compaction that builds up in high-clay soils. Do it in spring or early summer, when warm-season grass is actively growing, so the lawn recovers fast.
Where the soil runs alkaline, it also changes how you correct yellowing: soil-applied granular iron binds and becomes unavailable to roots. Use a foliar iron spray or quality compost instead. For the full month-by-month schedule, see the Georgetown seasonal lawn calendar, and the watering guide for cycle-and-soak on clay.
Where Georgetown’s clay runs alkaline (a soil pH above 7), granular iron spread on the soil binds chemically and never reaches the roots, so the lawn stays yellow. Use a foliar iron spray or quality compost instead.
How do you tell St. Augustine, Bermuda, and Zoysia apart?
Blade width and mow height are the tells. St. Augustine has wide, flat blades and tolerates partial shade, mowed at 2 to 4 inches. Bermuda has fine, narrow blades, demands full sun, and is mowed at 1 to 2 inches. Zoysia is medium-width and dense, mowed at 1 to 2.5 inches. Texas A&M AgriLife Extension — St. Augustinegrass
| Grass | Blade | Sun / shade | Drought tolerance | Foot traffic | Mow height |
|---|---|---|---|---|---|
| St. Augustine | Wide, flat | Best shade tolerance; needs 4–6 hrs sun | Moderate; needs more summer water | Low; recovers slowly | 2–4 in |
| Bermuda | Fine, narrow | Full sun only; no shade tolerance | High; the most drought-tolerant | High; self-repairs fast | 1–2 in |
| Zoysia | Medium, dense | Full sun to moderate shade | High once established | High; dense and wear-tolerant | 1–2.5 in |
Never remove more than one-third of the grass canopy in a single mow. Cutting too short stresses roots, especially in Georgetown’s clay soil.
Here is what each grass looks like up close in a real Williamson County lawn:
- Full sun, low water: Bermuda, the most heat- and drought-tolerant choice
- Partial shade (4–6 hrs sun): St. Augustine, the most shade-tolerant warm-season grass
- Moderate shade, HOA-friendly: Zoysia, dense and low-maintenance
- Deep shade under mature trees: no warm-season grass survives, so use mulch or shade beds
How do you spot chinch bugs in St. Augustine?
Chinch bugs are the most common St. Augustine pest in Williamson County, and the check window is the hot, dry stretch of summer. Their damage mimics drought stress, so yellowing despite adequate watering is the key signal. Confirm with the coffee-can float test: more than two bugs floating up per four-inch can means an active infestation worth treating. Texas A&M AgriLife Extension — St. Augustinegrass
To run the test, remove both ends of a coffee can, press it two to three inches into the soil at the edge of a yellowing patch, and fill it with water. Chinch bugs float to the surface within a few minutes. For the full spot-test-treat walkthrough, see the chinch bugs guide.
When should you call an operator?
Match the symptom to the cause. Yellowing despite watering points to chinch bugs or fungal disease. Brown patches after heavy rain are usually fungal. Uneven growth usually resolves with core aeration, and thinning in shade often means a grass-type mismatch. No green-up by late April suggests pest or disease damage, not dormancy. Texas A&M AgriLife Extension — St. Augustinegrass
- Yellowing despite watering: chinch bugs or fungal disease.
- Brown patches after heavy rain: fungal disease, common in slow-draining clay.
- Uneven growth in an established yard: usually resolved by core aeration.
- Thinning in shaded areas: often a grass-type mismatch (Bermuda in low sun).
- No green-up by late April: suspect pest or disease damage, not normal dormancy.
If any of those match your lawn and you would rather not diagnose it yourself, you can have a local Georgetown pro handle it.