How to Compost when its Freezing Outside | Shifting Roots

How to Compost when its Freezing Outside

We all want to do our part and compost as much as we can. But how do you continue composting in winter, especially if you live in the freezing hinterland that is Canada? Does composting even work in winter? And what about when it’s minus 40?!?!

If you are looking for someone who understands what it’s like to try and continue composting during six long months of winter, you’ve come to the right place. I live in Saskatoon, Saskatchewan, Canada, so I know what it’s like to trudge through 2 feet of snow to the compost bin.

By the end of this post, you’ll know how to winter compost, how it works, and what fellow Canadians do when the temperature is unreasonable.

If you’d rather watch than read, watch this video below on winter composting.. .

Can You Compost in Winter?

Yes, but it’s probably not what you think. Even though a large compost pile will create a substantial amount of heat, the average household compost pile will freeze during a Canadian winter.

Translation: Nothing is happening.

But don’t let that deter you. You can still put all of your household scraps on the compost pile all winter long. When the weather warms up in the spring, the decomposition process will start again and your pile will continue to make black gold.

Before I had a fancy compost bin, I threw my household compost straight on my garden area over the snow all winter long. Sure, it was a bit gross when the snow melted, but I just lightly worked it into the soil as soon as the ground was dry, and the bulk of it decomposed in around 2 weeks.

As long as you don’t throw in any bones or meat (and you shouldn’t be anyway!) rodents shouldn’t be a problem.

Related: Compostable Newsprint Pots

How do you take care of a compost bin in winter?

The secret? Do nothing, except add your kitchen scraps to it.

You don’t need to worry about having too many green items in it, because chances are, you loaded up your compost in the fall with lots of browns (leaves, garden waste, etc.) If you’re really worried, you can always turn your compost in the spring as soon as it thaws out.

You also don’t have to worry about mixing the compost in with the snow or scraping snow off, or anything like that. Just dump the kitchen scraps on the compost bin, and let Mother Nature do the work in the Spring. Done.

Want to see our compost bin out of pallets? Here’s how we made it.

But what about when it’s FREEZING!

I’ll admit, I don’t really want to trudge out to the compost bin in -40 either. In that case, you can keep a large plastic container just outside your door to dump all of your compostable items in. They’ll freeze, and when the temperature is slightly more reasonable, move that frozen block of future compost to the main composting area.

Some people do this method the entire winter, and never go to the main composting area. Whatever you decide is fine, as long as it eventually goes in the compost bin.

Can’t I just Compost Indoors?

Sure! I personally don’t, because I have toddlers, and things could get messy very fast if I’m not careful. If you can compost indoors, you have a couple of options.

The first: Grab a large plastic bin with a lid and store your compost in there. After every week, sprinkle the contents with a thin layer of peat moss or soil that you’ve either saved from your garden or purchased from a store. You’ll eventually have to empty it out, but you can go a lot longer between those times.

The second: Give more advanced techniques, like vermicomposting or bokashi composting a try. I personally haven’t tried them, so I won’t go into them, but they are two good ways to make your scraps into compost a lot faster.

Will you give winter composting a try? Any tips to add?

Kristen Raney

Kristen Raney

Kristen is a former farm kid turned urban gardener who owns the popular gardening website, Shifting Roots.  She is obsessed with growing flowers and pushing the limits of what can be grown in her zone 3b garden.  She also loves to grow tomatoes, but oddly enough, dislikes eating them raw.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Grow roots with us

Kristen

Welcome!

Hi, I'm Kristen and I help new gardeners learn to grow their own vegetables and beautify their yards. I also share recipes that use all that delicious garden produce. Grab a coffee (and your gardening gloves) and join me for gardening tips, simple recipes, and the occasional DIY, all from the lovely city of Saskatoon, Saskatchewan.

P.S. First time gardener? You'll want to download the quick start gardening guide below!