By Rick Wagner.I used scrap wood I had lying around the car port, but of course new wood will work just fine. I used a circular saw for both ripping and cross cutting. You will need a drill bit for countersunk holes for the wood screws. I used number eight galvanized steel wood screws and a power philips bit.
You have to decide on the size and shape of your box. I needed something appropriate for planting a croton I was planning to dig from the back yard. Compute the board lengths and widths and find or purchase and cut as necessary.
I have seen and made quite a few growing boxes of different designs. I arrived at the design shown here a few years ago and continue to use it beacuse it is simple, rugged, and works well for growing bonsai.