- 1). Take the labels off 1,500 2-liter bottles, and wash the bottles with soap and water. Continue scrubbing off all label residue until the bottle is completely clean.
- 2). Cut the bottoms off the 2-liter bottles with scissors or a utility knife. Remove the bottle caps.
- 3). Measure a 6-by-8-foot rectangle on the ground in an area that gets good drainage. Mark each corner of the rectangle with a small piece of wood.
- 4). Remove each piece of wood, one at a time, and dig a hole in its place. Make each hole 2 feet deep and about 12 inches in diameter.
- 5). Put an 8-foot post in each hole. Mix concrete in a bucket and pour it into the hole to hold the post in place. Measure the distance between each post as it sets up, and make sure the posts remain in a 6-by-8-foot rectangle.
- 6). Mulch the area inside the posts. This gets rid of weeds and aids in drainage once the greenhouse is complete.
- 7). Build a rectangular frame for each side of the greenhouse. Use two 8-foot posts and two posts measuring 6 feet, 4 by 4 inches, screwed together with 3-inch screws, for the sides of the greenhouse. Use four posts measuring 6 feet, 4 by 4 inches, screwed together with 3-inch screws, for the front and back frames of the greenhouse.
- 8). Put one 2-liter bottle onto a garden cane and let it slide to one end, with the top of the bottle pointed toward the end of the cane. Add bottles to the cane, with the bottles facing in the same direction as the original bottle, so that the bottles are stacked inside each other. When you only have room left for one bottle, turn it the opposite direction of the other bottles and nestle the cut end of it into the cut end of the nearest bottle. Do this until you have at least 140 bottle-filled canes.
- 9). Lay the bottle-filled canes across the openings of the greenhouse's front, back and side frames that you created. Make sure the canes on the side frames are parallel with the 6-foot sides of the frame.
- 10
Hammer fencing staples over the ends of each of the canes to attach the canes to the frames of the greenhouse. Once the canes are all attached, move the frames to the posts that have already been erected. Screw three of the frames to the posts, using 4-inch screws, leaving one of the 6-by-6-foot ends of the greenhouse frame open. - 11
Make a roof for the greenhouse. Create a 6-by-8-foot rectangle with 2-by-2-inch posts and use posts measuring 5 feet, 2 by 2 inches, to make a triangle pointed upward from each 6-foot end of the rectangle. Screw the 5-foot posts together at the top and to the rectangular base at the bottom. Place an 8-foot post between the top points of the two triangles, and screw the post into place. Place the roof on the top of the greenhouse frame, securing it to the three erected walls with screws. Stretch plastic across the roof, trim it down so that it just covers the roof and staple it into place. - 12
Attach the final wall of the greenhouse to the frame with hinges. This allows one wall of the greenhouse to swing outward, providing interior access to the greenhouse. Use three hinges, one roughly a foot from the top, one a foot from the bottom and one toward the center. Add at least one simple lock to the opposite side of the wall to secure the wall of the frame in place while no one is in the greenhouse.
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