Worm Composting 

What is Worm Composting and How Do You Get Started?

Ever heard of worm composting? Or vermicomposting? It’s the same thing — using worms to create compost for your garden. It’s easy, inexpensive, and great for the garden.

The byproduct of  worm composting are worm castings an organic form of fertilizer produced from earthworm poop. As earthworms feed on your organic waste they turn those kitchen scrapes into worm castings aka black gold for the soil. Worm manure helps aerates the soil, provides beneficial nutrients, and is also effective for repelling many pests.

Are you ready to get going?

Follow this step-by-step worm composting guide to get started — it’s like an organic garbage disposal, with your garden as the winner.

Earthworms in composted soil
Compost scraps

1. Choose your container. Wood or plastic works well, but to make is super simple, reach for one of those large plastic storage containers with a lid. You’ll need one that is 8-12 inches deep (plastic sweater storage containers are great). You can also find ready-made worm bins online or at a specialty garden center.

2. Order your worms. Plan on two pounds of redworms (about 2,000 worms) for every pound per day of food waste. If you’re not sure how much food waste your household produces, track it for a week and divide that number by seven. Worms can be ordered online after doing a quick Internet search.

3. Decide on the container location. Redworms prefer temps of 55-77 degrees, so a cool garage or enclosed porch could be ideal. Also, it’s interesting to note that worms are kind of like people in that they don’t like a lot of excess noise and vibration, so avoid putting the bin in high traffic areas.

4. Prepare the bedding. Soak a large amount of shredded newspaper in water, and then wring it out so it’s moist rather than dripping wet. Place it all in the bin until the container is 1/3 to ½ full. Add a bit of sawdust, fine sand, or ground eggshells to the newspaper so the worms have something gritty to help them grind up the paper.

Hand holding healthy soil
Worm in soil

5. Add the worms. Dig down to the middle of the bedding and place your worms in that space. Cover the bin and set it aside for about a week for the worms to settle in.

6. Add kitchen scraps. After the first week, add kitchen scraps like fruit and veggie peels, crushed eggshells, tea bags, and coffee grounds. Avoid meat and dairy. Add just a small amount once a week — if you add more kitchen waste than the worms can process, you’ll end up with a stinky garbage bin.

7. Monitor the worm bin. If the bedding looks dry, mist it with some water. If it’s too wet, add dry newspaper strips to absorb the excess moisture. Other than that, sit back and let the worms do their thing.

8. Harvest worm castings. Once the bedding starts to disappear and the contents of the bin look more like soil (about 1 ½ to 6 months), it’s time to harvest. To harvest, push the bin’s contents (compost, partially composted materials, and worms) to one side of the bin. Pick out the partially composted materials and place them on the empty side of the bin, and add more kitchen scraps on top. Replace the bin cover and leave alone for a couple of weeks. The worms will migrate over to the new food, leaving the fresh compost for you to take and use in your garden.

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Worm composting guide
Worm composting guide
  • Arthur E.Behne
    Posted at 15:58h, 19 March Reply

    Do not forget ( VERY IMPORTANT )—– ALWAYS HAVE DRAINAGE HOLES—–I made this mistake when I was 12 years old—— MANY DEAD WORMS

  • Scott Davis
    Posted at 22:11h, 13 December Reply

    Here is a good tip. Make sure the top is sealed around the top, no space for critters or others. We had a worm bin, filled it with worms, they settled in, we fed them, then one day I went to harvest worm castings and the scraps were still there and moldy. I dug through the scraps and found no worms. So I took apart the worm bin ( it was one of those tower types ) and in the bottom I found a fat frog. It looked very happy.

    • kellogggarden
      Posted at 18:31h, 16 December Reply

      Oh no! Sorry that your worm bin was infiltrated, keeping the top secure and sealed is a great tip. At least that frog got to enjoy it!

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