This tutorial can be used to build two versions of 4’x4’ raised planter beds on casters, one is 18” high and the other is 30” high. But you can adjust your lumber lengths and do whatever size you need.
WHAT YOU WILL NEED:
For the 18” high planter bed:
21 2x6’s 4’ long*
2 2x4’s 41” long*
4 4x4’s 24”long*
2 1/2” galvanized screws
4 industrial strength casters**
Drill bit for drilling pilot holes
Phillips head bit tip
For the 30” high planter bed:
Same as the 18” except you will need 29 of the 4’ 2x6’s and the 4x4’s need to be 36” long
*Note on the lumber: Most resources on the web will tell you to use Cedar or Redwood for outdoor projects, as they are less prone to rot. I asked my woodworking instructor about this and he is not convinced that they are much better than Douglas Fir, so that is what I used. Mine don’t have to last a lifetime, you can decide for yourself what to use according to your needs.
**Note on the casters: The wood and dirt are going to really add up weight-wise and you will need casters that have at least 250 lb load capability each. These can be very pricey, but I found a great deal and exceptional customer service at SES casters.