Composting and worm-farming

Did you know that around 45% of the waste in red bins in Ku-ring-gai is food waste?* This food waste is then transported to landfill where it rots without air to form harmful greenhouse gases.

Fortunately, organic material can easily be returned to the soil as rich fertiliser, compost and mulch. Compost improves plant growth, increases the capacity of the soil to hold nutrients and the ability of plants to resist disease.

Home composting and worm-farming is easy, fun and an important way of reducing the volume of these valuable materials going to landfill, cutting down on the associated greenhouse gases and returning nutrients back into the soil. By increasing the number of households that compost in our area we can reduce our ecological footprint and improve our local environment and community.

Composting workshop 13 May cancelled

Due to COVID-19 the composting workshop to be held at Kimbriki on 13 May 2020 has been cancelled. The next workshop is planned for 12 November 2020 10am - 1pm. Bookings are required. To book your place contact Sally Allport on 9424 0919 or email

Kimbriki Eco House and Garden offers a range of informative workshops on composting and worm-farming for adults and schools. 

Join the Compost Revolution in Ku-ring-gai!

The Compost Revolution is a free and fun online resource available to Ku-ring-gai residents which will teach you the skills of composting and worm-farming.

By completing the online tutorial and the short quiz that follows, you are eligible to purchase a subsidised compost bin or worm warm (complete with worms) via the Compost Revolution. As part of Council’s commitment to reduce food waste, we are offering up to 40% discount on the Compost Revolution worm farms and compost bins to Ku-ring-gai residents that complete the online tutorial and quiz and order the products.

Your compost bin or worm farms will be delivered to your door for FREE.

Click here to join the Compost Revolution!

Anyone can do the online tutorial and you can do it as many times as you like. However, the discounted offer is only available to residents of Ku-ring-gai and limited to one of each product. The Compost Revolution in Ku-ring-gai is funded by Council's Environmental Levy.


In compost bins, microscopic organisms turn kitchen and garden waste into decomposed organic matter known as compost. When used in the garden, compost provides soil with essential nutrients, breaks up heavy clay soils and helps sandy soils retain moisture.

You can compost:

  • fruit and vegetable scraps;
  • pulp from juicers;
  • bread crusts;
  • crushed eggshells;
  • tea bags;
  • coffee grounds and filters;
  • grass trimming;
  • leaves and flowers;
  • pine needles.

Read more on composting

Worm farms

Worms make structures called worm casts, which are a great natural fertiliser. Worm farms can be used to breed worms and collect castings. Castings can be placed straight onto your garden or mixed with water to make a liquid fertiliser for pot plants.

Worms will eat:

  • fruit and vegetable scraps (variety is important);
  • pulp from juicers;
  • bread crusts;
  • crushed eggshells;
  • tea bags;
  • leaves;
  • cardboard (shredded and soaked);
  • paper;

Worms don't like onion, garlic or citrus fruits and may escape the farm to get away from them.

Read more on worm farms

Love Food Hate Waste

Did you know the average NSW household throws away more than $3,000 worth of food each year?

Love Food Hate Waste provides great tips for cutting down on food waste that you need to compost or worm-farm in the first place and provides yummy nutritious recipes for your leftovers. Bon appetit!