"Biodegradable" on a poop bag doesn't mean it composts, and it definitely doesn't mean it disappears in landfill. Only two label claims are backed by an actual test: "compostable" to a named standard, and "home compostable" to a named standard. Everything else on the packet, including "eco", "biodegradable" on its own, and "plant-based", can mean almost anything the maker wants it to.
If you only remember one thing before you buy: look for a certification logo and a standard number, not just a word.
What does "biodegradable" actually mean on a poop bag?
Almost nothing you can rely on. "Biodegradable" just means something will eventually break down, given enough time and the right conditions. It doesn't say how long, and it doesn't say what it breaks down into.
A conventional plastic bag is technically "biodegradable" too, over several hundred years, into microplastics rather than soil. Unless the pack also states a real standard and shows a certification logo, "biodegradable" is a marketing word, not a promise.
What's the difference between compostable and home compostable?
Compostable means a bag has been tested and certified to break down in specific conditions, and the two conditions aren't the same. EN13432 (the Seedling logo) is the European standard for industrial composting, done in commercial facilities that run hot and hold a steady temperature. TUV OK compost HOME certifies a bag will break down in an ordinary backyard compost bin. A home bin usually sits around 20 to 30°C, with about 90% breakdown within a year.
Home certification is the harder of the two to earn, because a backyard heap is cooler and less consistent than a commercial facility.
A bag can carry one certification, both, or neither. Only the certification tells you which. LGD's bags carry both, Seedling EN13432 and TUV OK compost HOME, so they're rated for either an industrial facility or your own compost bin.
What about "oxo-degradable" and "plant-based"?
Oxo-degradable plastic is ordinary plastic with an additive that makes it fragment into smaller pieces faster when exposed to sunlight and oxygen. It doesn't compost. It breaks into microplastic, which then sits in soil or waterways indefinitely. Several countries, including New Zealand, have moved to restrict oxo-degradable packaging for exactly this reason. If you see the word "oxo" anywhere on the pack, it's not a compostable bag.
Plant-based describes where the material came from (usually corn starch or a similar plant polymer) rather than what happens to it at the end of its life. A plant-based bag can be certified compostable, or it can behave more like plastic once it's made.
So where should a compostable poop bag actually go?
Certified home compostable bags are rated for your own compost bin. A home compost heap is a real option, as long as you keep pet waste separate from any compost destined for edible plants. We've covered how to do that properly in our guide to home composting dog waste. Bags certified only to the industrial EN13432 standard need a commercial composting facility, not your backyard bin, so check what's permitted in your council's green waste service.
Where neither is available, general rubbish is still the fallback. A compostable bag in landfill isn't worse than a plastic one, it just won't break down the way it would in compost.
How to actually check a poop bag before you buy it
- Look for a certification logo with a standard number. Seedling (EN13432) or OK compost HOME (TUV Austria) are the two that matter for compostability. No logo, no standard number, no claim you can verify.
- Check the thickness. A bag has to be thick enough to hold up on a walk without a certification meaning nothing in practice. LGD's bags are 20 microns thick, which is thicker than average.
Our 10-pack of compostable poop bags is certified to both Seedling EN13432 and TUV OK compost HOME. They run 20 microns, on an FSC-certified cardboard core so the roll itself doesn't add plastic waste. It comes as 10 rolls of 12 bags, $26.99, and there's a 5-pack at $15.99 if you want to try a smaller amount first. Both are backed by a 30-day money-back guarantee.
Questions people ask
Are compostable dog poop bags actually better for the environment than plastic ones?
Used the way they're certified, home compostable or industrially compostable bags break down into soil rather than microplastic.
What does the Seedling logo mean on a poop bag?
It means the bag has been independently tested and certified to EN13432, the European standard for industrial composting. It tells you the bag is designed to break down in a commercial composting facility, not necessarily in your backyard bin.
Can I put a home compostable poop bag in my regular compost bin?
If it's certified to TUV OK compost HOME, yes, that's what the certification tests for. Keep pet waste compost separate from any compost you'll use on food gardens, since dog waste can carry pathogens that garden composting at home doesn't reliably kill.
Is "biodegradable" the same as "compostable"?
No. Biodegradable only means something will eventually break down, with no fixed timeframe and no test behind it unless a standard is named alongside it. Compostable means it's been tested against a specific standard, like EN13432 or OK compost HOME, and shown to break down in defined conditions.
Do thicker poop bags mean better quality?
Thickness affects how a bag holds up on a walk, not whether it composts. A thicker bag is less likely to tear in your hands when you least want it!