What You Need:
- A tray of grass or growing seeds
- A jar
- Place the jar over a patch of grass or a section of your plant tray of seeds.
- Watch the plants under the jar grow taller and faster than the ones outside.
The jar creates a greenhouse, which provides a warmer and moister atmosphere for growing plants. The light and heat from the sun go through the glass and heat the air inside, and the heat cannot escape very easily.