Zoysiagrass Lawn Care Schedule for Georgia

Nitrogen Budget

For zoysiagrass, the working range is a minimum of about 0.5 lb of nitrogen per 1,000 sq ft up to a good ceiling of about 3 lb per 1,000 sq ft over the season, with 4.5 lb per 1,000 sq ft flagged as a point to watch rather than a target. This range carries medium confidence, so treat it as a planning band and adjust based on how the lawn is actually responding — color, density, and growth rate matter more than hitting an exact number.

Mowing Height by Season

Across spring, summer, and fall, keep zoysiagrass in the 1" to 2" band, with 1½" as the sweet spot — that height keeps density up without inviting scalp damage. Zoysiagrass does best kept low and consistent through the growing season rather than let to stretch.

Follow the one-third rule: never remove more than a third of the blade in a single mow. If the lawn has gotten away from you, step the height down gradually over two or three cuts instead of scalping it back in one pass.

The one exception is a single spring reset cut, down to about 1", to clear last year's dormant thatch and speed up green-up. Bag the clippings for that one cut, then return to the normal 1½" height for the rest of the season.

The Seasonal Schedule

Pre-emergent herbicide goes down as soil rises to about 55°F, typically in the March 1 to March 29 window — this gets ahead of summer annual weeds before the lawn fills in. A fall pre-emergent follows later, as soil cools back through about 70°F, roughly August 28 to October 3, to intercept winter annual weeds like annual bluegrass, henbit, and chickweed. Note that a fall pre-emergent also blocks grass seed, including any winter ryegrass overseed, so plan for one or the other, not both, and confirm the product is labeled for zoysiagrass.

Spring green-up fertilizer follows once soil holds consistently above about 65°F and the lawn shows roughly half green-up, generally April 6 to May 4. A second, peak-growth feeding lands in the active summer window, about May 25 to July 6.

If renovation or overseeding is on the list, the window is late spring into early summer — about May 4 to June 29 — once soil is reliably in the 65°F to 70°F range and nights stay warm. That timing gives zoysiagrass a full growing season to establish before dormancy; warm-season grass should not be seeded in fall.

Other seasonal windows worth tracking: core aeration in late spring (about April 24 to June 5) once the lawn is actively growing; broadleaf weed control on actively growing weeds (about May 1 to June 18), checking the label for grass compatibility and avoiding application above roughly 90°F or under drought stress; a summer wetting agent (about May 16 to July 15) if dry patches are a recurring problem; and, in early fall, a high-potassium, low-nitrogen application (about September 21 to November 2) to support cold hardiness heading into dormancy. An annual soil test in early fall (about July 27 to October 25) is the most reliable way to fine-tune lime and nutrients rather than guessing.

Watering

The general target is about ¾" of water per week for zoysiagrass, split into two deep soakings of about ½" each, watered early in the morning so the lawn dries before nightfall — wet turf overnight invites disease. Water deep and infrequent rather than shallow and often, so roots are encouraged to grow down.

In sustained heat, that weekly target rises: about a quarter inch more once highs sit near the mid-80s, up to about a half inch more when three or more days push near 90°F. Cap the increase so the soil can absorb it without runoff.

Timing Conflicts to Watch

If a broadleaf herbicide has recently gone down, wait about six weeks (42 days) before seeding — the herbicide needs that window to clear before new seed is put at risk.

If a crabgrass pre-emergent has recently been applied, wait longer still: about twelve weeks (84 days) before seeding. Pre-emergents are built to stop seeds from establishing, and that includes the seed you're trying to plant. In both cases, check the specific product label for its own reseeding interval — the label is the law, and it overrides general guidance.

Treat these windows as a framework, not a countdown — soil temperature, rainfall, and how the lawn is actually behaving should always have the final say over any date on a calendar.