How Long Does It Take for Dog Poop to Decompose?

Short answer: How long does it take for dog poop to decompose? About 9 weeks in warm, damp weather on a lawn, and up to a year or more when it's cold, dry or shaded. Since your dog adds a new pile every day, waiting it out never works. Weekly pickup does.

Fallen autumn leaves breaking down in the grass at the base of a wooden backyard fence post

How long does it take dog poop to decompose outside?

The fastest real-world number is about 9 weeks. Pet Poo Skiddoo, a scooping company, photographed one pile on a lawn every week starting in late March, as the weather warmed up. It shrank a little at a time and was gone by week 9, leaving a bare patch of grass where it sat.

That's the best case. Public agencies give a longer range. The City of College Station, Texas, says "dog waste takes up to a year to fully decompose." The City of Roswell, Georgia, puts it at "a year or more to fully break down, depending on climate, the dog's diet, and other factors."

So a fair answer is somewhere between 2 months and a year, depending on the weather and where the pile lands.

Why does dog poop take so long to break down?

Dog poop doesn't vanish. Microbes in the soil break it down a little at a time, and they need warmth, moisture and contact with the ground to do it. When any of those is missing, a pile just sits there and dries out.

The bigger issue is volume. The City of College Station counts more than 32,000 dogs producing about 24,000 pounds of waste a day. That works out to roughly three-quarters of a pound per dog, every day. If one pile needs 9 weeks at best, a dog that goes daily keeps adding piles far faster than old ones disappear. That's why regular dog poop pickup beats waiting it out.

What speeds up or slows down decomposition?

Condition	Effect on decomposition	Typical timeframe
Warm, damp spring or summer weeks	Faster. Microbes are most active.	About 9 weeks for one pile
Cold snaps and winter	Slower. Breakdown nearly stalls.	Months; a pile can sit until spring
Dry spells and drought	Slower. Piles dry out and harden.	Months
Dry shade (under a deck, behind shrubs)	Slower. Little sun, little moisture.	Up to about 6 months with little change
Pile on bare soil	Faster than on thick grass	Closer to the 9-week end
Pile on concrete, gravel or pavers	Barely breaks down	Until someone picks it up
Many piles in one spot	Slower than a single pile	Longer than a single pile
Diet	Varies by dog	Up to a year or more, per Roswell

Table sources: Beco, Crap Be Gone, Poo Squad, Pet Poo Skiddoo and the City of Roswell (links below).

Does dog poop decompose faster in soil than on grass?

Yes, a pile touching bare soil usually breaks down faster than one sitting on top of thick turf. The microbes that do the work live in the soil, and dense grass holds a pile up and away from them.

That doesn't make grass a good place for it. In the Pet Poo Skiddoo diary, the grass under the pile was bare by week 8 because the pile blocked the sunlight. Leave piles out long enough and you get brown and yellow spots across the lawn. Whether dog poop is good fertilizer is a separate question, and we'll cover it in its own guide.

How long does dog poop take to decompose in a Texas yard?

We couldn't find a Texas-specific study, so here's how the conditions above play out in a typical Texas yard:

Spring and fall: warm, with rain now and then. Closest to the 9-week best case.
Hot, dry summer stretches: piles can bake hard on top and break down slowly until it rains.
Winter cold snaps: breakdown slows down. A pile left in December can still be there in spring.
Shady corners and fence lines: the slowest spots in any season, and the ones people miss when they scoop.

Either way, it's always weeks to months, never days.

Why not just let it decompose?

Because the yard never catches up. While piles break down, they leave bare and yellow patches in the lawn, they smell, they get stepped in, and rain spreads them around. The City of College Station also warns that rain can wash dog waste into storm drains that "connect directly to area creeks, rivers, and lakes without filtration."

It's a neighbor issue, too. Tyler's city code expects animal yards and pens to be "cleaned and maintained so as to prevent the escape of noxious odors or substances to adjacent properties" (Sec. 14-10(b)). If the smell is already a problem, our guide on how to get rid of dog poop smell in yard spaces walks through the fix step by step.

How often should you pick it up instead?

At least once a week. The North Central Texas Council of Governments advises: "Clean up dog waste in your yard at least once a week." More dogs, more rain or a smaller yard usually means more often.

If you'd rather not do it yourself, Howdy Yard Care scoops yards across our Texas service area:

Weekly, 1 dog: $20 a visit, billed $85 a month
Each extra dog: +$3 a visit
Every other week: $30 a visit
Initial Cleanup (a yard that's been building up a while): $65 for up to 1 hour, bigger cleanups quoted on request

All prices are plus tax. Your first weekly visit is free with a 4-week signup, through November 30, 2026. If your yard needs an Initial Cleanup first, that's charged at $65 plus tax for up to 1 hour, and the free visit is your first regular weekly visit after it. If you cancel during the first 4 weeks, the free first visit is billed at the regular rate.

We bag every pile and haul it away with us after each visit — nothing gets left in your trash can.

Call or text Howdy Yard Care at (832) 291-3112. Howdy Yard Care, 125 Elders Dr, Tatum, TX 75691.

FAQ

How long does dog poop take to decompose in the summer?

In warm, damp weather, about 9 weeks for a single pile on a lawn. In a hot, dry stretch it can take longer, because dried-out piles break down slowly until it rains.

Does dog poop decompose in the winter?

Very slowly. Cold weather slows the microbes that break it down, so a pile left in winter can still be there in spring.

Does rain make dog poop decompose faster?

Some moisture helps, but rain mostly softens piles and spreads them into the grass. It doesn't take them away. Scoop once the yard is dry enough to walk.

Should I bury dog poop so it decomposes underground?

Burying hides a pile, but it still has to break down, and dogs often dig it back up. Bagging it and getting it out of the yard is simpler.

Sources

Pet Poo Skiddoo, "How long does it take dog waste to decompose?": https://petpooskiddoo.com/blog/how-long-does-it-take-dog-waste-to-decompose/
City of College Station, TX, "Help keep College Station safe and clean – always Scoop the Poop when walking your pet" (15 Dec 2025): https://blog.cstx.gov/2025/12/15/help-keep-college-station-safe-and-clean-always-scoop-the-poop-when-walking-your-pet-4/
City of Roswell, GA, Environmental Public Works, "Doesn't dog waste decompose?": https://www.roswellgov.com/faqs/doesnt-dog-waste-decompose/
Beco, "How Long Does Dog Poop Take to Decompose? Full Guide": https://www.becopets.com/blogs/news/how-long-biodegradable-poop-bags-decompose
Crap Be Gone, "How long does it take dog poop to decompose?": https://crapbegone.com/how-long-does-it-take-dog-poop-to-decompose
Poo Squad, "How Long Does Dog Poop Take to Decompose?": https://www.poosquad.com/how-long-does-dog-poop-take-to-decompose/
North Central Texas Council of Governments, Pet Waste: https://www.nctcog.org/envir/watershed-management/stormwater/pet-waste
City of Tyler Code of Ordinances, Sec. 14-10(b): https://codelibrary.amlegal.com/codes/tyler/latest/tyler_tx/0-0-0-90962