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This is a VillageGreen greenhouse. It cost about $70. It is about 4-1/2 feet square. All of the connectors are plastic and push together. When the shelves are full of potted plants and the sun warms it up, the connectors get soft and the greenhouse collapses. But it was a quick and easy solution to provide more space, so I worked out a way to reinforce it, and it now works great.
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I set the greenhouse frame on wood blocks to isolate it from the wet soil and reduce corrosion. At each corner, inside the frame, I drove a piece of 1/2" rebar into the soil and covered it with a 1/2" PVC pipe. I then zip-tied the frame to these four posts, which keeps the connectors from spreading apart.
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Using 1/8" nylon cord I installed diagonal bracing on the two sides, in an "X" pattern
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I did the same "X" bracing on the back wall and added ahorizontal tie to help keep the two sides from spreading apart.
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Another view showing the wood blocks and diagonals
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Another view of the blocks, posts and diagonals.
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Another view of the blocks, posts and diagonals.
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