Raised garden beds (also called garden boxes) are great for growing small plots of veggies and flowers. They keep pathway weeds from your garden soil, prevent soil compaction, provide good drainage, and serve as a barrier to pests such as slugs and snails. The sides of the beds keep your valuable garden soil from eroding or washing away during heavy rains. In many regions, gardeners are able to plant earlier in the season because the soil is warmer and better drained when it is above ground level. Raised beds are also ideal for square-foot gardening.
By raising the soil level, raised garden beds also reduce back strain when bending over to tend the bed. This is especially helpful for older gardeners or people with bad backs. And if the beds are built well, the gardener can sit on the edge of the bed while weeding. For some gardeners this is the biggest benefit of all.
Raised beds are not the same as garden planters. Planters are elevated containers which have bottoms to prevent the soil from falling out. Planter bottoms usually are slatted, with some type of semi-permeable cloth barrier which permits drainage. Raised beds, however, do not have bottoms; they are open to the ground, which offers the benefit of permitting plant roots to go further into the ground for available nutrients.