How to make greenhouse benches

Written by heidi cardenas
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How to make greenhouse benches
Make a sturdy slat-top greenhouse bench with 2-by-4 lumber and cement blocks. (Jupiterimages/BananaStock/Getty Images)

Once your greenhouse is constructed, you'll need some benches to hold potted plants, trays, tools and supplies. Placing potted plants on benches in the greenhouse raises plants above ground level for optimal air circulation and accessibility for watering and maintenance. Benches must be strong enough to hold the weight of potted plants, and made from materials that will perform well in a greenhouse environment. They can be simple wooden slats on concrete blocks or complex raised hydroponic grow beds. Useful wooden benches are well within the average do-it-yourself skills and abilities.

Skill level:
Easy

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Things you need

  • 12 cement blocks
  • Construction level
  • Tape measure
  • 2 lengths of cedar or treated lumber, 2 inches by 4 inches by 6 feet
  • 12 lengths of cedar or treated lumber, 2 inches by 4 inches by 3 feet
  • Sandpaper
  • Galvanised nails or screws
  • Hammer or power drill
  • Brush or sponge
  • Waterproofing wood sealant

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Instructions

  1. 1

    Place four of the cement blocks in a 3-foot by 6-foot rectangular form, one in each corner, to begin the foundation for the bench. Check to see if the blocks are on flat, level ground with the level tool.

  2. 2

    Stack the remaining eight blocks on the corner blocks, three high, to create the legs of the bench. Use the level to check that the blocks are all the same height and on a level surface.

  3. 3

    Sand all the wood pieces to remove rough edges and splinters.

  4. 4

    Place the 6-foot pieces of lumber on the ground or on a large work surface. Position them 3 feet apart, parallel to each other.

  5. 5

    Place the 3-foot pieces of lumber vertically across the longer pieces, every 6 inches, starting at one side of the longer wooden pieces.

  6. 6

    Nail or screw the shorter pieces of lumber securely into the 6-foot pieces to construct the bench top.

  7. 7

    Brush the waterproofing sealant onto the wood and let it dry.

  8. 8

    Place the completed wooden slat bench top onto the cement block legs to complete the greenhouse bench.

Tips and warnings

  • If you're using hollow cement blocks, metal pipe or rods sunk into the ground in the middle of the cement blocks will add stability.
  • Adjust the bench height by adding extra cement blocks.

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