With water on one side and soil on the other, this 33×18-inch water garden idea checks all the boxes for a statement patio piece. Build the box yourself with our how-to, then deck it out with your fave plant picks.
From 1×12 cedar, cut two 33-inch lengths for the side panels and three 16-1/2-inch lengths for the ends and divider. Cut a 16-1/2×31-1/2-inch panel from plywood for the base. For the legs, cut four 12-inch lengths from 1×2 and four 12-inch lengths from 1×3.
To build the legs, glue and clamp a 1×3 to a 1×2 to form four L-shape corners. Allow glue to dry, then reinforce the connection with trim screws.
Glue and clamp the frame together, making sure it is square. Secure the corners with exterior screws (these will be hidden by the legs).
Apply wood glue to the edge of plywood base. Attach to the frame with trim screws. Make sure screws are securely fastened.
Rip the center divider by 3/4-inches so it sits evenly atop the base. Attach center divider to the sides with trim screws and at the bottom with exterior screws.
Attach L-shape legs to frame in each corner with glue and exterior screws. Fasten from inside the box so screws don’t show.
Treat the outside of the planter box with a protective coating of waterproofing seal. Coat the inside of the box with rubberized sealant to make it watertight. We applied a double coat to the crevices to ensure a watertight box. Drill several 1/8-inch drainage holes in the bottom of the soil compartment only.
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