Does grass go dormant in Northeast Florida?

Partially. St. Augustine grass slows dramatically and can brown after a hard frost, while Bermuda and Zoysia go more fully dormant. Because our winters are mild, roots stay alive and growth resumes quickly during warm spells, so the lawn still needs basic attention.

Should I fertilize my lawn during winter in Florida?

Hold off on nitrogen fertilizer during the coldest weeks. Feeding while the lawn is cold-stressed pushes tender new growth that the next frost can damage. UF/IFAS recommends waiting until consistent spring growth begins, which in North Florida is usually around mid-April.

Why did my lawn turn brown after a frost?

Frost burns tender leaf blades, which turns them brown or tan. The grass is usually not dead: crowns and roots survive and push new growth in spring. Uniform browning right after a cold snap is normal, while isolated patches that keep spreading may point to pests or disease instead.

How often should I water my lawn in winter?

Far less than in summer. Water only when the lawn shows wilt, such as folded leaf blades or footprints that linger. Overwatering in cool weather is one of the main drivers of large patch fungus in St. Augustine lawns. Under the current regional water shortage order, Duval and St. Johns County homes are also limited to one irrigation day a week, so winter is a good time to skip cycles. Check current rules at sjrwmd.com/wateringrestrictions.

When should I apply pre-emergent in Northeast Florida?

For spring and summer weeds, pre-emergent timing tracks soil temperature rather than the calendar. In the Jacksonville area the window usually falls between mid-February and early March. Applying after weeds have sprouted does little.

Do I still need pest control in the winter?

Yes. Northeast Florida winters are mild enough that ants, roaches and other pests stay active, and cooler weather drives some of them indoors. Year-round perimeter service keeps the protective barrier intact.

Winter Lawn Care in Northeast Florida: Do's & Skips

Short answer: Northeast Florida lawns go semi-dormant, not fully dormant. From December through February, water only when the grass shows wilt, mow less often and keep blades high, keep leaves off the turf, skip nitrogen fertilizer until spring growth begins, and treat spreading brown patches as a possible fungus or pest problem rather than assuming cold is the cause.

Not Sure What Your Lawn Needs This Winter?

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How Northeast Florida Winters Actually Treat Your Lawn

Winters in the Jacksonville and St. Augustine area are mild on average, but a handful of hard frosts arrive almost every year. St. Augustine grass, the most common local turf, responds by slowing to a crawl and sometimes browning after a freeze. Bermuda and Zoysia go further and can look fully dormant for weeks.

Two things matter about this pattern. First, the soil rarely gets truly cold, so roots stay alive and the lawn is not asleep, just idling. Second, cool and wet is the favorite combination of large patch fungus, which is why the most common winter lawn mistake is kindness: too much water, too much fertilizer, at exactly the wrong time.

lawn care in jacksonville fl, lawn treatment in st augustine fl, lawn fertilization in st johns county fl — A frosty morning on a dormant lawn. Browning like this after a freeze looks alarming but the crowns and roots below are alive and ready for spring. (Photo: Famartin, via Wikimedia Commons, CC BY-SA 4.0)

What to Do From December Through February

Six habits carry a Northeast Florida lawn through winter in good shape:

Water only when the lawn asks for it. Folded leaf blades, a blue-gray tint and footprints that stay pressed are the signs. Cool soil holds moisture far longer than summer soil. Duval and St. Johns County homes are also limited to one irrigation day a week while the regional water shortage order stands (odd addresses Saturday, even addresses Sunday, never 8 a.m. to 6 p.m.).
Mow less often and keep the deck high. Taller blades insulate crowns from frost and keep the lawn photosynthesizing on warm days.
Keep leaves and debris off the turf. A mat of wet leaves blocks light and traps moisture, which is an open invitation to fungus.
Watch for large patch. Circular brown or orange patches that expand in cool, wet stretches are usually this fungus, not cold damage.
Spot-treat winter weeds. Cool-season weeds like annual bluegrass, chickweed and henbit stay active while the lawn rests, and they are easiest to remove while small.
Plan the late-winter pre-emergent. The spring weed window usually opens between mid-February and early March in the Jacksonville area, timed to soil temperature.

Watering days are limited right now: read the one-day-a-week watering rules for Jacksonville and St. Johns County. For round brown patches that keep growing, see large patch in St. Augustine grass.

lawn maintenance in ponte vedra fl, lawn care in nocatee fl, lawn treatment in jacksonville fl — Leaves left sitting on turf block light and trap moisture, a combination that invites fungus during cool stretches. (Photo: Famartin, via Wikimedia Commons, CC BY-SA 4.0)

What to Skip Until Spring

Most winter lawn damage in our area is self-inflicted: the right practice at the wrong time. These four can wait.

Heavy Nitrogen Feeding

Fertilizing during the coldest weeks pushes tender growth the next frost will burn. UF/IFAS guidance for North Florida is to wait until spring growth begins, usually around mid-April.

Aeration and Dethatching

Both wound the turf on purpose, and the lawn heals them only while actively growing. Save these for late spring when recovery is fast.

Scalping the Lawn

Cutting low before cold snaps exposes crowns to frost damage. Keep the mowing height up until consistent spring growth returns.

Watering on a Summer Schedule

Cool-weather overwatering is the main driver of large patch fungus in St. Augustine turf. Water on wilt, not on the calendar.

Brown Does Not Always Mean Dead (or Harmless)

A brown winter lawn is usually just cold-bronzed and waiting for spring. Sometimes it is not. The pattern and timing tell you which situation you are in:

Clue	Cold Dormancy	Large Patch Fungus	Pest Damage
Pattern	Uniform browning across exposed areas right after a frost	Circular patches that slowly expand in cool, wet weather	Irregular patches with a visible damage border, any season
Timing	Appears within days of a hard freeze	Most active fall through spring in wet stretches	Often appears in warm months but lingers unnoticed
Recovery	New green growth returns from crowns in spring	Slow recovery; improve drainage and ease off water	Spreads until the pest is identified and treated

Two pests stay worth ruling out through winter. Grub worms feed on roots into the fall and their damage often goes unnoticed until the lawn fails to green up, and chinch bug damage from autumn lingers as dead patches that never recover. Our chinch bug damage guide shows what that looks like.

Local Lawn Help From RightWay

RightWay's lawn fertilization, weed control and lawn-pest service is built around Northeast Florida conditions: treatment timing follows turf growth and weather, not a national calendar. Homeowners can also review service information for Ponte Vedra, St. Augustine and other St. Johns County communities.

Service is available in selected Northeast Florida communities. Contact RightWay through the quote form or call 904-290-6400 with your address and a description of what the lawn is doing.

Sources

For the spring start date and local limits, see when to fertilize St. Augustine grass in Jacksonville and St. Johns County.

Winter Lawn Care in Northeast Florida: What to Do (and What to Skip)