Louisiana Lawn Care Calendar: What to Do Month by Month in Lafayette
Louisiana Lawn Care Calendar: What to Do Month by Month in Lafayette
A Lafayette lawn needs mowing from March through November, pre-emergent weed control in two windows (late winter and early autumn), fertilization concentrated between April and September, and core aeration in late spring. The growing season here runs roughly nine months, which is why calendars written for northern lawns get the timing badly wrong.
By Alice Lily · Lawn Care Lafayette LA · Published 5 October 2026
Why a Louisiana Lawn Calendar Looks Different
Most lawn care advice online is written for cool-season grass in a climate with a five-month growing season. Lafayette has roughly nine months of active growth and grass that behaves in the opposite way, so following a national calendar here reliably produces the wrong action at the wrong time.
The two differences that matter most: our grasses go dormant in winter rather than growing through it, so autumn is not the time to feed heavily; and our disease pressure peaks in the mild, humid shoulder seasons rather than in midsummer. Getting those two facts right prevents most of the problems we get called about.
Month-by-Month Lawn Care Calendar for Lafayette, LA
The Two Pre-Emergent Windows That Matter Most
South Louisiana has two annual pre-emergent windows: late winter, as soil temperatures climb through the mid-50s, and early autumn as they fall back through the 70s. Miss either one and you spend the following season treating weeds that were preventable.
Pre-emergent works by forming a barrier that stops germinating seed from establishing. It does nothing to weeds that are already up, which is why applying it late is effectively wasted money. The late-winter application targets summer annuals such as crabgrass; the autumn application targets the cool-season weeds — annual bluegrass and the winter broadleafs — that otherwise take over a dormant lawn in January and February.
Because both windows are driven by soil temperature rather than by the calendar, the exact date shifts year to year. That is the main practical argument for keeping fertilization and weed control on a managed schedule rather than a fixed reminder.
When Should You Aerate in Louisiana?
Late spring through early summer — roughly May into June — once warm-season grass is growing vigorously enough to fill the holes quickly. Aerating a dormant or stressed lawn opens it up without giving it the capacity to recover, which invites weeds instead of relieving compaction.
This is the opposite of the advice given for northern lawns, where autumn aeration is standard. Following that guidance here means aerating right as the grass is shutting down for winter, which is the worst possible timing.
Acadiana’s clay soil compacts readily, so most lawns here benefit from annual core aeration — especially newer subdivision lots in Broussard and Youngsville where construction traffic compacted the subsoil long before the sod arrived.
What Not to Do, and When
Four timing mistakes cause most of the avoidable damage we see on Lafayette lawns.
- Feeding nitrogen in late autumn. It pushes soft growth into brown patch season and leaves the lawn going into dormancy in a weakened state.
- Scalping in spring to “clean up” dormant grass. It removes the leaf area the plant needs to power green-up and exposes soil for weeds.
- Watering in the evening through summer. Overnight leaf wetness on top of heavy dew is close to ideal fungal conditions.
- Aerating in autumn. Correct for northern lawns, wrong for warm-season grass here.
Frequently Asked Questions
When does grass start growing again in Lafayette?
Typically March, with full green-up through April. Exact timing depends on soil temperature rather than the calendar date, so it shifts a few weeks year to year.
How many times a year should I fertilize a Louisiana lawn?
Most warm-season lawns here do well on a few rounds spread across the active growing season, from spring green-up through to early autumn. The key is stopping meaningful nitrogen after about September rather than feeding into late autumn.
Do I need to mow in winter in Lafayette?
Rarely. Warm-season grass goes dormant and largely stops growing, so many customers pause or reduce service between December and February and resume as growth returns in March.
When is the best time to plant or lay sod in Louisiana?
Spring through early summer, once the grass is actively growing and has the full season ahead to root before winter dormancy. Laying sod in late autumn gives it little chance to establish.
Why is my lawn brown in winter if it is not dead?
Warm-season grasses such as St. Augustine, Centipede and Zoysia go dormant and turn tan in cool weather. That is normal. The real test is spring, when a healthy dormant lawn greens back up.
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