A self-watering raised garden bed (aka raised wicking bed)

I saw this kind of bed when I called on Australia in 2014. It’s raised wicking bed.

One effective method of gardening in a spot with subpar soil is to build a raised bed, and as these videos show, they can also be built from scraps, and to water themselves.

Source: How to build a self-watering raised garden bed from scavenged materials : TreeHugger