If you’ve opened your wormery in the colder months and thought, “My worms seem to have gone to sleep!” — you’re definitely not alone. Winter changes everything inside a worm bin, from the worms’ activity levels to how quickly food breaks down.
Recently, someone shared photos of their wormery after noticing that the kitchen scraps they added two weeks earlier hadn’t been touched. But here’s the reassuring truth: your worms aren’t sleeping — they’re simply slowing down for winter.
Are Wormery Worms Less Active in Winter?
Yes — and it’s completely normal.
Worms are most active between 15–25°C, and when temperatures drop, their metabolism naturally slows. That means:
-
Food takes longer to disappear
-
Worms stay deeper in the bedding
-
Activity on the surface seems reduced
But reduced activity doesn’t mean they’ve stopped working altogether.
In the photos shared, there were plenty of worm casts — those tiny black flecks you’ll see throughout the bedding. Casts are proof that worms are eating and processing material, just at a gentler pace. The worms spotted near the surface were another encouraging sign that the bin is healthy.
Why Didn’t My Scraps Get Eaten?
Two big winter factors can slow things down:
-
Cool temperatures
-
Excess moisture inside the bin
A wetter wormery holds less oxygen and makes conditions a bit sluggish. Combine that with the winter chill, and scraps can sit around for longer than usual.
How to Help Your Wormery Through Winter
Here’s how to keep things ticking over nicely during the colder months:
1. Keep Adding Food — Just Monitor Activity
If you can still see worm casts and the occasional worm on the surface, it’s absolutely fine to continue adding small amounts of kitchen scraps.
2. Fluff the Top Few Inches
Gently aerating the upper layer improves airflow and creates a more comfortable environment for the worms. Better airflow = faster composting.
3. Balance Moisture With Dry Material
Winter wormeries often run wetter due to rain, humidity, or slower evaporation. Mix in:
-
Torn cardboard
-
Shredded paper
-
Egg cartons
Aim for bedding that feels like a wrung-out sponge — not sludgy and not soggy.
4. Keep the Wormery Sheltered
Place your bin under cover to protect it from heavy rain and frost. Insulating it with bubble wrap or an old blanket can help keep temperatures more stable.
5. Add More Cardboard if It Looks Sludgy
If the bedding has turned into a bit of a sludge fest, simply mix in extra dry cardboard until it looks crumbly again. Worms thrive in a well-structured, airy environment.
The Bottom Line
Your worms aren’t hibernating — they’re just working more slowly because it’s winter. With a bit of moisture control, good airflow, and steady feeding, your wormery will continue to tick along beautifully until temperatures rise again.
