You need 2 liter bottles, potting soil, seeds, thick string or yarn (either cotton or poly seems to work).
How To :
- Cut the bottle in half.
- Use a Phillips screwdriver and a hammer to punch a hole in the center of the bottle cap.
- Cut a length of yarn/string about 1'-1.5' long, double it over and tie a loop on one end.
- Thread the yarn/string through the hole in the bottle cap so that the knot is on the inside of the cap.
- Add potting soil and seeds...
- You need to water the soil from the top the first time in order to make sure that it is uniformly wet and that the string also is wet.