A keyhole garden is one where you can feed your kitchen and garden waste into the central area of the garden bed to decompost. The decomposition process generates heat to keep your crops warmer during cold days and nights. When you water the compost area, the minerals are dispersed into the surrounding soil to fertilize your plants, so that your plants grow better organically.
A keyhole garden is very cheap and easy to build. Watch the video tutorial for how to build your own keyhole garden so that you can enjoy it this gardening season.