When Does Grass Go Dormant? Temperature Chart by Grass Type

Here is the short version for the nine grasses most lawns are made of. The months are typical ranges, and your local climate can move them by a couple of weeks or more in either direction.

Those numbers come from extension work. NC State turf scientist Grady Miller puts the warm-season brown-out point near 50°F soil, UGA uses about 65°F at four inches for green-up, Clemson and Missouri Extension supply the green-up months, UF/IFAS covers St. Augustine and bahia, and Penn State, Missouri, and Colorado State cover the cool-season heat limits.

What Dormancy Actually Is

Dormancy is your lawn hitting pause, not dying. When conditions get too cold or too hot for active growth, grass pulls energy down into its crowns, roots, and rhizomes, lets the blades brown out, and waits. Missouri Extension describes it plainly: the lower portion of the plant usually stays alive but stops growing. That's why a dormant lawn can look dead for weeks or months and then flush green again once the weather swings back into its range.

On a course, the bermuda fairways go tan every winter, and nobody on the crew panics. You put the mowers up, keep carts off frosted turf, and wait on the soil to warm. The homeowners who get into trouble are the ones who treat that tan color as an emergency and start feeding to wake it up. UGA says to hold fertilizer until the soil reaches 65°F. Dormant is the plan.

Warm-season and cool-season grasses evolved for opposite climates. Missouri Extension puts warm-season grasses at their best when air runs 80 to 95°F and cool-season grasses at 60 to 75°F, so each family shuts down at the other's favorite end of the year. Once you know which family your grass is in, most of the questions below settle themselves. If you're not certain, our grass comparison tool can help you sort warm-season from cool-season at a glance.

The Dormancy Calendar by Grass Type

Does Bermuda Grass Go Dormant in Winter?

Yes. Bermuda goes dormant as soil cools to about 50 to 55°F, and the first hard frost finishes the job, which lands in late October or November across much of its range. NC State's Grady Miller puts the brown-out point near 50°F soil. It stays straw-tan through winter and greens up when soil reaches about 65°F at four inches, the trigger UGA uses. In the warmest parts of its range it may only go semi-dormant.

Does Zoysia Grass Go Dormant in Winter?

Yes. Clemson says zoysia turns brown with the first fall frost and stays dormant through winter. Missouri Extension puts Meyer zoysia at about six months of dormancy in the transition zone, with first green-up in late April. It's usually slower to wake than bermuda, which is why people assume it died over winter.

UGA notes that cool spring temperatures make zoysia and centipede slower to green up, and that different zoysia types green up at different rates. So a tan zoysia lawn in early April, next to a bermuda lawn that's starting to color, is usually right on schedule. It rarely died. Give it until the soil holds near 65°F before you judge it. For the full picture on this grass, see our complete zoysia grass guide.

Does St. Augustine Grass Go Dormant in Summer?

No. Summer is St. Augustine's growing season, and Clemson puts its best growth in the 80 to 95°F months. It goes brown and dormant in winter instead, and UF/IFAS notes that happens only in parts of Florida, so in its warmest range it may barely brown at all. Summer browning on St. Augustine points to drought, chinch bugs, or disease, so investigate it instead of waiting.

St. Augustine is a warm-season grass common in the hot, humid South. NC State Extension calls it the least cold tolerant lawn grass, and Clemson says it is very susceptible to winter injury. A hard freeze can do more than push it dormant. It can kill it outright in spots. Cultivar matters too: UF/IFAS rates Floratam's cold tolerance as poor, and Clemson notes its spring green-up is slow. That sensitivity is exactly why telling dormancy from damage matters so much for this grass. Our St. Augustine grass guide covers its care cycle in detail.

Does Centipede Grass Go Dormant in Winter?

Yes. Centipede browns as the soil cools toward 50°F and the first frost lands, and it usually sits dormant from November into April. UGA says it doesn't green up as quickly as some other warm-season grasses, and full green-up often waits until late April or early May. Patchy or dragging green-up is worth a closer look.

Centipede is warm-season and goes dormant in the cold, but it deserves a special warning. Clemson explains that heavy nitrogen, used to chase a darker green, lifts the runners above the soil and exposes the growing points to the temperature swings of late fall, winter, and early spring. Within a few years that shows up as large brown dead patches in early spring, a problem called centipedegrass decline. UGA's rule is to wait for full green-up and warm soil before feeding. The centipede grass guide explains why this low-maintenance grass still has a short list of ways to get it wrong.

Does Bahia Grass Go Dormant in Winter?

Yes. UF/IFAS says bahiagrass goes dormant during cold winters and resumes growth when temperatures turn favorable. How early it browns depends on the cultivar: UF rates Pensacola as the bahia that holds color and resists winter dormancy best, while Argentine loses color sooner in cool weather. Expect it to sit dormant from late fall into spring and green up as soil reaches about 65°F at four inches. Its deep roots let it ride out stress that browns other lawns.

Bahia is another warm-season grass, common in the Deep South and along the Gulf Coast on lower-input lawns. UF/IFAS notes it forms an extensive, deep root system, and in a long drought it goes dormant and turns brown until conditions improve. So bahia can brown in two seasons: winter cold and summer drought. Check the rain gauge before you blame the calendar.

Does Fescue Go Dormant in Winter?

Not really. Tall fescue holds most of its color through winter. Penn State notes that cool-season roots keep growing in soil below 50°F and only slow sharply as the soil approaches freezing, so the plant is still working underground while top growth idles. Fescue's real dormancy is a summer one, brought on by sustained heat and drought, which is the opposite season from warm-season grasses.

Tall fescue is a cool-season grass, and Missouri Extension puts cool-season growth at its best when air runs 60 to 75°F. When mid to late summer brings sustained heat and dry spells, tall fescue can brown out and coast until cooler, wetter fall weather brings it back. Missouri also says tall fescue tolerates summer heat and drought better than any other cool-season grass, so it's usually the last of the group to go. If your fescue browns in July and August, heat dormancy is the likely reason, though a watering problem can overlap with it. We cover this pattern in detail in our companion post on summer lawn dormancy in cool-season grass.

Does Kentucky Bluegrass Go Dormant?

Yes, and far more in summer than in winter. Bluegrass holds its color through cold weather and only slows as the soil nears freezing. Its real dormancy comes from heat and drought: Penn State notes bluegrass root growth drops sharply once the top inch of soil reaches 90°F. Without irrigation it often browns through July and August, and cooler weather and September rain bring it back.

Missouri Extension lists the ability to go dormant and survive long dry spells as one of bluegrass's strengths. Iowa State says Kentucky bluegrass and other cool-season grasses can stay dormant 4 to 6 weeks without significant damage. Bluegrass also spreads by rhizomes, the runners that travel below ground, which is part of why it can fill back in after a dormant summer stretch. Like fescue, it stays green through most of winter and saves its dormancy for the hottest part of the year.

Does Ryegrass Go Dormant?

Yes, in summer. Perennial ryegrass slows near freezing in winter but keeps its color. Its weak season is summer: Missouri Extension rates its heat tolerance only fair, though it notes newer cultivars have improved. Under heat and drought it browns from July into August, and September rain revives it. Annual ryegrass is different: it fades out for good once summer heat arrives.

Annual ryegrass is often used as a temporary winter overseed on dormant warm-season lawns in the South, and it tends to fade out as summer heat arrives instead of going dormant and returning. So if you overseeded bermuda with ryegrass for winter color, that green you see in January is the ryegrass, and it will hand the lawn back to the bermuda as the weather warms. If keeping color on a dormant lawn appeals to you, our guide to overseeding with ryegrass for winter walks through the seed rates and timing.

Does Fine Fescue Go Dormant?

Yes, and summer heat is what does it. Missouri Extension lists fine fescue as not heat tolerant, and Colorado State says it may go dormant after a week or two of heat in the 90s°F. Winter is its strong season, and Colorado State calls it very cold tolerant. Cooler weather and September rain bring it back.

That weak heat tolerance is why fine fescue shows up mostly in shade mixes and cooler northern lawns. Purdue recommends it only for moderately dense shade in southern Indiana, where summer stress runs harder. In a sunny transition-zone yard, expect it to go tan ahead of the tall fescue growing next to it.

Does Grass Go Dormant in the Summer?

Cool-season grasses can. Tall fescue, Kentucky bluegrass, ryegrass, and fine fescue slip into drought dormancy when a hot, dry stretch runs on with no rain or irrigation, and they stay brown until fall. Warm-season grasses do not. Bermuda, zoysia, and St. Augustine are at peak growth in summer heat, so summer browning on those lawns signals a problem to track down. Our companion post on summer lawn dormancy in cool-season grass covers how long a cool-season lawn can safely stay brown and when to step in.

Regional Variation Moves Every One of These Dates

Notice that every window above is fuzzy on purpose. Where you live moves the timing more than the species does. A bermuda lawn in north Texas can sit dormant for much of the winter, while the same grass on the Gulf Coast may only brown for a short spell in a mild one. A fescue lawn in the upper Midwest may sail through summer with barely a hint of heat dormancy, while the same seed in the transition zone browns out reliably every August.

Elevation, soil type, sun exposure, and how much you water all shift the timing too. A shaded, north-facing slope holds dormancy longer in spring. Iowa State says about an inch of water a week keeps a cool-season lawn from going dormant in summer, while an unwatered one browns on the first hot, dry stretch. A generic calendar can't nail that kind of timing for your specific yard.

If you want the dates pinned to your actual address instead of a national average, this is where the product earns its keep. A personalized 12-month care plan tells you the exact weeks your grass type goes dormant and breaks dormancy for your zip code, so you stop watering and mowing on the wrong schedule and stop panicking over browning that was always coming. Start with a free photo diagnosis and it will read your grass type and current condition before building the calendar around it.

How to Tell On-Schedule Dormancy From a Real Problem

This is the part most people get wrong, because dormancy and damage can look identical from the street. A few signals help you tell them apart. Dormancy is usually uniform: the whole lawn, or large even areas, browns together as the season turns. Damage tends to be patchy, irregular, or sharply outlined, like fertilizer streaks, pet spots, fungus rings, or grub-eaten sections that lift up like loose carpet.

Timing is the other tell. If a warm-season lawn browns in fall and winter, that is on schedule, and it is also your signal to put the mower away, which we walk through in when to stop mowing your lawn. If it browns in the middle of a warm, well-watered summer, something is wrong. If a cool-season lawn browns in a hot, dry August, that is likely heat dormancy. If it browns in mild spring weather, look for disease, pests, or a care mistake. The tug test helps too: dormant grass crowns stay firmly anchored and the base near the soil often holds a faint green tinge, while dead grass pulls out easily with no resistance.

When you genuinely can't tell, don't guess, and don't start dumping water or fertilizer on a lawn that may be resting. UGA warns that late nitrogen can delay dormancy and expose warm-season grass to frost and freeze injury. Our full walkthrough on whether your grass is dead or dormant covers the tests step by step. Or skip the detective work: snap a photo for a free AI diagnosis and let it compare the pattern, color, and season against what your grass type should be doing right now.

What Other Guides Miss

Most dormancy articles treat dormancy as one thing. There are two different modes, and confusing them is how people end up watering a lawn that doesn't need it or writing off grass that's about to come back on its own.

When I ran a crew, the winter job on the bermuda was mostly staying off it. The cool-season turf was the opposite: in a summer dry spell somebody walked it every afternoon, because heat dormancy left alone too long turns into dead grass. Cold dormancy you wait out. Heat dormancy you watch.

Cold dormancy, the kind warm-season grasses enter in winter, is a deep, scheduled shutdown driven by falling soil temperatures and frost. It lasts months, it's predictable, and feeding during it is wasted. Water is a different matter in a dry winter: Clemson says to water a dormant lawn as needed to prevent dehydration, especially when warm, bright days come before a forecast low in the 20s°F.

Drought or heat dormancy, the kind cool-season grasses slip into in summer, is a faster protective response to heat and dry soil. Iowa State says cool-season lawns can stay dormant 4 to 6 weeks without significant damage, but a lawn left dry much longer can cross from dormant into dead. The fix is modest: Iowa State suggests about a quarter inch of water a week to keep the crowns hydrated without greening the lawn, and a single 1 to 1 1/2 inch soak if dormancy runs past 4 to 6 weeks. It also advises against letting a lawn bounce in and out of dormancy all summer, so pick one plan and hold to it. That grass-type-and-season call is the kind a personalized plan is built to make for you.

Your Dormancy Action Plan

1. Identify your grass family first. Warm-season grasses go dormant in cold; cool-season grasses can go dormant in summer heat. Everything else follows from this. Use the grass comparison tool if you are unsure.
2. Match the browning to the season. Warm-season brown in fall and winter is normal. Cool-season brown in a hot, dry summer is normal. Off-season browning is your cue to investigate.
3. Track soil temperature for green-up. UGA ties warm-season green-up to about 65°F at four inches, and the soil temperature tool beats guessing by date.
4. When in doubt, do the tug test and check for patchiness before you reach for water or fertilizer on a possibly dormant lawn.
5. Get your local dates from your state extension office, and let a personalized plan pin the exact dormancy and green-up weeks to your zip so you stop reacting and start scheduling.
6. Line the rest of fall up behind it with our fall lawn care schedule and checklist, so feeding, seeding, and the last mow land before dormancy sets in.

Brown does not have to mean dead, and it usually does not. Once you know which dormancy your grass runs and roughly when, the seasonal color swing stops being a scare and turns into a calendar you can plan around. That calendar also tells you when to act: a thin cool-season lawn heading into winter is a candidate for dormant seeding, sowing seed on the cold ground so it germinates at the first spring warmth. Watch the soil more than the calendar. The grass does.