Build A Potting Bench

Fix It Up! : Episode FIX-808 -- More Projects »
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VIDEO: Click the image above for a brief video about building a potting bench.
Hosts Pat Simpson and Jodi Marks build a potting table for use outdoors. They recommend building with pressure-treated lumber, cedar or redwood.

Build the Frame

  1. Using a table saw, we cut our pressure-treated lumber to size. We cut four 36" x 2-1/2" x 2-1/2" wood for the two back and front legs and then cut two 20" x 3" x 2" cross members and upper and lower rails.
  2. Next, we cut the two sides of the shelving units from 5/4" x 6" decking boards, and we also cut the 5/4" decking boards to make the lower shelf and the countertop.
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Figure A (Click to enlarge)
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Figure B (Click to enlarge)
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Figure C (Click to enlarge)
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Figure D (Click to enlarge)
  • We decided to use dado joints to hold our shelves in place. To make our cuts, we clamped all four pairs of legs together and then marked the lower edge of each notch (figure A).
  • We used a square to draw lines across the boards at these marks. Then at the table saw, we adjusted the saw blade to cut the depth of the dado.
  • We cut the notch to the waste side of the pencil mark to both edges of the dado (figure B). If the board is narrow, you can use a miter gauge to guide the wood.
  • Finally, we cut dadoes in the back braces and the sides of the shelving unit to hold the shelves (figure C).

    * You may need to chisel out your dado cut for a smooth fit.

  • To start the assembly, we pre-drilled the legs.
  • We spread wood glue in each notch to add extra strength and durability to the framing, then laid the horizontal braces in place (figure D).
  • We then drove 2-1/2" wood screws at each joint, countersinking the screw heads flush with the surface of the wood.
  • Finally, we pre-drilled the leg assemblies and screwed the cross members to the back leg assembly and the front leg assembly.
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    Figure E (Click to enlarge)
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    Figure F (Click to enlarge)
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    Figure G (Click to enlarge)
    Attach Shelves
    1. We first pre-drilled the 5/4" decking boards and laid one decking board on the lower shelf to check the fit and alignment.
    2. Using 2" screws, we attached the board to the frame (figure E).
    3. We butted the remaining 5/4" decking boards together and attached them.
    4. On the boards going on next to the legs, we needed to mark for a notch cut to be made in the 5/4" decking boards. We made the notched cuts on the table saw on two of the 5/4" decking boards so they could fit around the legs (figure F). Then we attached them to the lower shelf.
    5. Next we moved to the tabletop and attached the remaining decking boards (figure G).

    Potting Soil Tub

    1. We needed to make a hole in the tabletop so we could insert a plastic tub for potting soil. To mark our cut, we traced around the bottom of the tub. After we had our circle made, we used a 7/16" paddle bit to make a hole to start cutting the circle out.
    2. Using a jigsaw, we cut out the opening in the countertop for the plastic tub. Be sure to use a sharp blade in your jigsaw to make cutting easier. The sharper blade will keep the wood from burning.
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    Figure H (Click to enlarge)
  • Next, we pre-drilled through the tabletop and placed a 2x2 under the countertop (figure H). Using 2-1/2" screws, we attached the 2x2 underneath the countertop to give added support for the 5/4" boards we cut to provide access for the plastic tub.
  • Finally, we put the tub in place.
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    Figure I (Click to enlarge)
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    Figure J (Click to enlarge)
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    Figure K (Click to enlarge)
    Back Shelves
    1. We stood the first upright shelf support in place and attached it to the table using screws (figure I).
    2. Then we placed and attached the second shelf support.
    3. Next, we measured and determined the height for our shelves, be sure not to make your top shelf to high so you can reach it.
    4. We cut a 30-degree angle on the shelf support cleats and attached the cleats to the uprights with screws.
    5. We measured for the shelves between the two uprights. Once we had the measurements we cut the shelves to length using the miter saw.
    6. We placed the bottom shelf in place on top of the cleats (figure J).
    7. Next, we pre-drilled and attached the shelf to the cleats using screws.
    8. Then we placed and attached the top shelf to the cleats.
    9. To give additional support to the shelves we used scrap pieces of 5/4" decking to create center supports (figure K). This will help keep the shelves from sagging in the middle .
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    Figure L (Click to enlarge)
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    Figure M (Click to enlarge)
    Finishing Touches
    1. Using a router with a round over bit we rounded the front and side edges on the tabletop (figure L). Then we routed the front edge of the bottom shelf.
    2. Next, we used the random orbit sander with 150-grit sandpaper on the potting bench to smooth out any rough areas and to prep the surface for the stain.
    3. To remove the dust from the potting bench we used a shop vacuum and then wiped it down with a damp cloth.
    4. Finally, we used brushes to apply an oil-based stain to the potting bench (figure M).

      * When using an oil-based stain, make sure that you are in a well-ventilated area. Also, be sure to use brushes and rollers that are made for applying oil-based paints and stains. If you want to add a second coat, let the stain soak in for about 20 minutes and then apply the second coat while the bench is still wet.

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