Add bedding
Moist cardboard and paper give worms a safe, airy place to live.
A simple guide for happier worms and healthier plants
Turn kitchen scraps
into garden gold.
Learn how to start a worm bin, keep it healthy, solve common problems, and use finished castings to help your garden grow.
Your composting helper
Eisenia fetida
55–77°F
a comfortable bin temperature
Damp
like a wrung-out sponge
Buried
food helps prevent flies
Slowly
increase feeding over time
Choose what you need
New to worm composting?
Start right here.
01
Why worms help soil
See how castings support soil structure, moisture, nutrients, and the tiny life around plant roots.
02
Use worm castings
Learn what finished castings look like and how to use them safely in pots and gardens.
03
Care for your worm bin
Set up a comfortable home, feed the right amount, and harvest with confidence.
04
Fix a worm bin problem
Quick answers for smells, flies, heat, wet bedding, slow worms, and escape attempts.
How a worm bin works
Scraps go in. Rich, crumbly castings come out.
Add small meals
Bury fruit and vegetable scraps in one pocket at a time.
Worms and microbes work
Together they break food into smaller, plant-friendly material.
Harvest castings
The finished material is dark, crumbly, and smells pleasantly earthy.
Every bin moves at its own pace. Temperature, moisture, worm population, and food choices all affect the timing.
Simple truths
What beginners should know.
Good to know
Not all worm castings are the same.
What you feed the bin and how you care for it shape the finished castings.
Use with care
A little can go a long way.
Mix castings into potting soil or add a light garden top-dressing instead of filling a pot with castings alone.
Watch and learn
Your plants and bin will show you what works.
Start small, compare results, and adjust for your plants, soil, weather, and finished batch.
Your first week
Four steps to a happy bin.
- 01Fill the bin with damp, fluffy bedding
- 02Add worms and let them settle in
- 03Bury one small handful of food
- 04Wait until most of it is gone before feeding again
Quick answers
Before you bring worms home
The most common beginner questions, answered simply.
Will a worm bin smell?
A healthy bin smells earthy, not rotten. Bad smells usually mean too much food, too much moisture, or too little air.
What can I feed red wigglers?
Start with small amounts of fruit and vegetable scraps, coffee grounds, and crushed eggshells. Avoid meat, dairy, oily food, and large amounts of citrus.
How do I keep the worms alive?
Keep their bedding damp like a wrung-out sponge, provide airflow, protect the bin from temperature extremes, and avoid overfeeding.
When are castings ready to harvest?
Harvest when most bedding looks dark and crumbly, smells earthy, and contains very few recognizable food scraps.
Science, made useful
Curious about the evidence?
2026Earthworm gut microbiota and their role in vermicompostingReview · Annals of Microbiology2025Vermicompost alters soil microbial communities and decomposition but increases nitrate leachingField study · Ecology and Evolution2023Sustainable organic waste management using vermicompostingCritical review · Environmental Science: Processes & Impacts
Ready to begin?