Garden Box June 19, 2017 by Dogger With the new house.. I had to build a new Garden Box..This time we went with 4×8, but we added 8 inches of depth to 24 total.. Just some Materials… Locate the spot and measure it out.. Bring the ends of the Box together with 3.5 inch Decking Screws… Line the Box with Landscaper fabric to stop the weeds.. Add Pea Gravel to the bottom for drainage.. Then fill it with a bunch of good dirt.. Just about ready to plant.. more dirt….