A good height for a bench is generally recognized at about 18.
Build planter box bench seat.
Assembling the seat frame.
This allows for a cushion of about 2 thickness for individuals that are of average height.
Cut pieces of 5 4 decking for the sides of the planter.
5 build the frames for the bases use the 4 5 amp jigsaw to cut the following pieces from the 2 x 4 cedar.
Drill pilot holes through the rim components and insert 2 1 2 screws into the 19 supports.
The area should be level with plenty of room for a large bench.
To build each side clamp the pieces and attach a 2x6 brace which also acts as a cleat to hold the bottom pieces.
Place the two pre made planter boxes in a desired location 6 feet apart.
Attach 2 2 supports to the planters as shown in the plans.
The planters will serve as supports for the garden bench.
Cut the brace 2 inches shorter than the width of the side and attach it with screws.
You should be looking at a 24 x 96 bench seat with a 17 1 2 x 22 1 2 opening at each end for plants.
Select a location for your planter bench.
Use 2 1 2 screws to secure the supports to the wall planters.
Use 2 4 lumber to frame the seat for the planter bench.