Elizabeth from treehugger said that The zero waste movement is about sending nothing to the landfill. It relies on five basic principles; refuse, reduce, reuse, recycle, and rot (and in that order).
While zero waste may be most famously known for plastic-free grocery shopping and personal care products, it can be applied to the garden as well.
Zero waste gardening means making the most of things that might otherwise have been thrown away, and avoiding waste of all kinds when creating and maintaining a garden.