How to Build a Planter Bench

Hammer a spike into each pilot hole until its head sits flush with the surface. After each spike, use the seat frame to check for square and level, making adjustments as needed. Next, apply adhesive on the second course, and lay the next course of boards, continuing to lap the joints as in Step 4B. Nail the boards in place with 3-inch galvanized nails. Continue gluing and nailing courses, overlapping the joints with each layer, until the planters reach the height you want for the bench. (Nine courses above ground will give you a common bench height of around 18 inches.)