There are many ways to recycle in the garden. This includes recycling kitchen food scraps, garden clippings and yard waste, and cardboard products. Roof Garden-a garden that is built on an existing rooftop using a waterproof membrane, specialized drainage systems, a lightweight growing medium, and plants. Rubber Mulch-a recycled alternative to bark mulches. This product is made from recycled tires and is very useful for protecting against weeds, along pathways and roads.