Things You'll Need
Instructions
Wash the 2-liter bottle. Use a mild soap and water to clean the inside of the bottle. Be sure to rinse all the soap out.
Remove the label and cut the bottle in two. Cut around the bottle about 3 inches from the bottom, keeping the cut as straight as possible.
Add soil and seeds. Place a couple of inches of soil in the bottom of the bottle, plant your seeds or small plant and water well.
Put the bottle back together. Slide the cut part of the bottle top into the bottom. This will create a good seal, keeping moisture and warmth inside your greenhouse. If necessary, cut a few slits at intervals along the edge of the top portion to assist in the fit.