Louisiana Lawn Care Calendar — 2026

Lawns across Louisiana are dormant in January. Temperatures are well below the 55°F soil threshold that triggers growth in st-augustine, bermuda, centipede and similar warm-season grasses, so the turf is straw-colored and should be left alone. Do not apply fertilizer, herbicide, or heavy foot traffic to dormant turf — you will do nothing to help it green up earlier and you risk damaging crowns.

February is the month southern warm-season lawns in Louisiana begin transitioning. Soil temperatures in Phoenix, New Orleans, and the Florida peninsula can cross the 55°F pre-emergent threshold this month, so pre-emergent herbicide applications should begin in these zones. In the rest of Louisiana, the lawn is still dormant.

March is when the Louisiana lawn-care calendar truly begins. Pre-emergent herbicide should be applied during the window of January–February (New Orleans), February–March (Shreveport). Missing this window is the single most expensive mistake homeowners make — the crabgrass, goosegrass, and annual bluegrass seed bank in Louisiana soils will germinate the moment soil temperatures cross 55°F for three consecutive days, and once those weeds are up you cannot stop them with pre-emergent this season.

Spring timing in Louisiana can vary by 3 to 6 weeks from the north of the state to the south — use your local soil temperature reading rather than a calendar date to trigger pre-emergent and first fertilizer applications.

April brings Louisiana lawns into active growth. Warm-season lawns complete their green-up and are ready for the first fertilizer application March–April. Cool-season pockets in the north of the state should wait until May. Never fertilize grass that has not fully greened up — you will feed weeds and stress the turf. Last-frost dates across Louisiana: March 1 (Shreveport), February 15 (Baton Rouge), January 20 (New Orleans).

Spring timing in Louisiana can vary by 3 to 6 weeks from the north of the state to the south — use your local soil temperature reading rather than a calendar date to trigger pre-emergent and first fertilizer applications.

June is peak growing season in Louisiana. Lawns are at maximum density and should be mowed weekly — or every 5 to 7 days for fast-growing Bermuda. Water deeply once or twice per week to encourage deep roots rather than shallow daily sprinklings. Aim for 1 to 1.5 inches of water total per week, including rainfall. If you see ruts from the mower, the soil is too wet to be mowing on.

Louisiana watering guidance: irrigate deeply and infrequently (1 to 1.5 inches per week total, including rainfall) rather than lightly and daily. Deep watering drives roots down; shallow watering keeps them at the surface where they dry out in the first heat wave.

July is peak warm-season month in Louisiana. Lawns are thriving and growing aggressively. Mow every 5 to 7 days and do not let clippings pile up. Skip fertilizer — the lawn does not need more nitrogen during peak heat and excess will drive fungal disease. Monitor for brown patch, dollar spot, and chinch bugs, especially on St. Augustine.

August mirrors July for warm-season lawns in Louisiana. Continue weekly mowing, monitor for disease pressure, and avoid fertilizer. If you see brown patches spreading in circles, especially on St. Augustine, apply a fungicide labeled for large patch. Water early in the day so grass is dry before evening to reduce fungal pressure.

September slows warm-season growth in Louisiana and is the start of transition to dormancy. Skip heavy nitrogen and instead apply a potassium-rich fall food that builds root reserves for winter. Continue mowing weekly but raise the deck slightly to prepare for winter dormancy.

Sharpen your mower blade before the final mows. A dull blade shreds rather than cuts, leaving fringed tips that brown out and give disease a foothold over winter. Clean cuts heal quickly even in cooling weather.

October is winterizer month across Louisiana. Apply the winterizer fertilizer in October (North Louisiana only) — a fertilizer with higher potassium than nitrogen — to build cold tolerance in the grass crown. Warm-season lawns are entering dormancy; mow one last time at 1.5 inches and drain your irrigation system by month-end.

If you have not done a soil test in three years, October is a good month to pull samples and submit them to your state Extension Service. Results come back in 2 to 3 weeks and will tell you exactly what to apply next spring.

November is the end of the active lawn-care season in Louisiana. Lawns are fully dormant by month-end in most of the state. Drain and winterize your irrigation system before the first hard freeze. Rake up any remaining fallen leaves — they will smother dormant warm-season turf through winter.

December is a fully dormant month in Louisiana. No mowing, no fertilizing, no watering. Clean and store your mower for winter. Dormant grass is easily damaged by foot traffic on frozen mornings — keep off the lawn when frost is visible on the blades.