To build a grow box, cut 30-inch-long boards, make the sides out of scrap wood, secure the box with wood glue, and drill drainage holes at the bottom. You need a 6-foot-by-1-inch-by-8-inch board and a 4-foot-by-1-inch-by-8-inch board to complete this project.Continue Reading
Use a circular saw to cut two 30-inch-long boards from the 6-foot-by-1-inch-by-8-inch board. Make the front and back portion of the box.
Make a hole at the bottom of the box. Cut out a 30-inch piece from a 4-foot-by-1-inch-by-8-inch board. Position the bevel of the saw to 10 degrees. Make sure the board is cut 5 inches at the diameter.
Use the remaining scraps to make the sides of the board. Cut the pieces to measure 5 7/8 inches on the top and 5 inches at the bottom.
Fit the pieces together, but avoid securing them. Cut away any edges, and sand away any rough spots.
Apply clamps to the front, side and back of the box. Use wood glue to hold the pieces together. Allow the box to dry overnight.
Make holes at the bottom of the box. Space out the holes evenly.
Use stain or paint to decorate the completed grow box.