How to make your own worm farm
What you'll need
- two broccoli boxes (available at your supermarket or fruit shop)
- brick or ice-cream container
- compost or potting mix
Your worm farm will cost approximately $50 for the worms.
If you reuse materials around the house, your worm farm will be free.
- Make holes in the bottom of one of the boxes to let the liquid drain.
- Worms breathe through their skin.
- Place the box with the holes on top of the other box.
- Optional: make a tap in the bottom box to let the liquid drain.
- Worm juice can also be collected by removing the top tray and pouring liquid from the bottom tray into a container.
- Put the upturned ice-cream container or a brick in the bottom box to help the worms climb.
- Make the bedding: soak a few layers of newspaper in water then place in the bottom of the top box.
- Add compost over the newspaper, to the thickness of your palm.
- Add your composting worms - earthworms are not suitable.
- Worms can double their population in three months.
- Add food scraps: put your kitchen scraps on top of the bedding regularly, but in small amounts.
- Over time as more worms breed, you will be able to give them more to eat.
- Don’t add too much food at once.
- Avoid feeding the worms meat, bones, fatty food, bread or dairy products.
- Worms don’t like citrus fruits, raw onion or raw garlic.
- Some foods such as fruit, form acid. Add a little wood ash, dolomite or garden lime every few weeks to prevent the worm farm from becoming too acidic.
- Wait until the worms have burrowed in the bedding before applying lime or wood ash.
- Worms can eat up to their body weight in one day.
- Cover the food scraps with newspaper or a piece of hessian, and place the lid of the broccoli box on the top.
- Add water to the box whenever it gets dry. It should be the consistency of a damp sponge. If it is too wet, mix dry shredded newspaper throughout the bedding.
- The worms should be placed in a cool and shady spot in your garden or garage.
- Harvest the worm castings by moving it all to one side of the farm.
- Add fresh bedding to the empty side.
- Many of the worms will move to the fresh bedding in a few days.
- Collect the worm juice from the bottom tray.
Worm farm and worm supply
Contact your local hardware to see if they supply worm farms and/or worms.
We can help you
If you need more information about worm farms, please contact Waste Services on:
- T: 4474 1024
- E: Council's Waste Services