Day 18: Compost


Why compost ?

Compost is an inexpensive, natural process that will transform your organics (kitchen and garden waste such as food scraps, branches…) into a valuable and nutrient rich food for your garden instead of the landfill.

Keep the CO² yearly emissions just to boiling the kettle, since this is how much CO² is saved by composting at home for just a year. Which is also equivalent to the CO² created by your washing machine over three months.

Some of us may wonder, why composting when my organic waste is going to break down in the landfill anyways? Or my council is doing food waste collection? It’s simple; air is needed for proper decomposition.

Organic wastes require air to be able to biodegrade by aerobic decomposition. This process produces minuscule amounts of the harmful greenhouse gas methane, putting organic waste somewhere where they can’t access air (in the landfill) they biodegrade in an anaerobic way, dramatically increasing the production of methane, damaging the atmosphere. By composting, you reduce the amount of methane in the atmosphere, and after 9-12 months, you will get a free fertilizer for your plants.

Benefits of the Compost for Your Garden :

  • Nutrient rich food product for your plants (containing nutrients plants need: phosphorus, nitrogen, potassium)

  • Improves soil structure

  • Maintains moisture levels (less water needed)

  • Helps balance your soil’s pH (buffer soils that are very acidic or alkaline)

  • Helps suppress plant disease



How to get started ?

Start at a workshop : Auckland, Wellington, or check with your council or other sustainability oriented organisation in your town !

More tips of how and what to compost here or download Sustainability Trust’s info sheet. Find out what you should NOT put in your compost !