Raised garden beds vary from 5 1/2 inches all the way up to 3 feet in height. Trying to find the correct height can be baffling, but you should choose the right height for your needs.
Height for Wheelchair Gardeners
A height of 24 to 30 inches is ideal for a person in wheelchair. The gardener can reach the garden easily from the chair.
Height for Sitting
If you want to sit and garden, make your raised bed about 18 inches tall. If you want to be more precise, you can measure a comfortable chair or bench and use that height.
Height for Deep-rooted Plants
Plants that have deep roots, such as carrots, need a minimum of 8 inches of depth for root space. Other crops, such as tomatoes and squash, will be fine with 6 inches.
Height for Poor Soil
If you live in an area with hard soil or with a lot of clay, the ground will act as a barrier. Build your raised bed at least 12 inches high.
Height for Gardeners Who Cannot Bend Over
For people who have trouble bending over, start with a raised bed 30 inches high. Again, this will vary with the height of the person. Measure from a table or counter that is comfortable to reach.