Convenient community composting

How it works

1. You join Soil Factory as a customer.

Our short sign up process helps us to understand what your household or business needs, and get you set up and ready to go. You pay monthly for your Soil Factory subscription, and we provide a weekly service.

2. You separate your soil ingredients into your bucket.

When you sign up, we provide you with one or more of our 20 litre buckets with lids, for you to put your food scraps in. Check out our Soil Ingredients list to find out what you can and can’t put in your bucket.

3. The ingredients come to the Soil Factory.

Every Friday, we jump on our e-cargo bike and whizz round the neighbourhood emptying all the buckets for our collection customers. By collecting on bike, and composting your scraps locally, we aim to reduce the emissions normally generating by collecting and trucking our waste out of town, and replace this with local, sustainable solutions. Check out our collection area here.

Drop off customers bring their buckets to Kelmarna on one of our drop off days from Wednesday to Friday, where we will help you to empty your bucket during staffed hours, or you can use our after-hours drop-off option.

4. We make beautiful compost.

After arriving on site, food scraps are mixed with other materials and hot composted using the NZ Box system, which has been specifically designed in Auckland for the purposes of community-scale food composting.

Our composting process also makes good use of other organic by-products and waste materials from local arborists, lawnmowers, coffee roasters, and furniture makers, returning all this nutrition to food production and saving it from being wasted.

5. We return the compost to the soil to help us grow more food!

Our finished compost feeds the soil at Kelmarna Gardens to grow more local, organic food, creating a self-contained food system in our neighbourhood, and building healthy soils capable of sequestering carbon from the atmosphere.

Soil Factory’s proceeds also fund Kelmarna’s work to connect people with nature and food growing, and support people with experience of mental illness and intellectual disability to garden for therapy.

Still have questions?
Check out our
FAQ page