Function

• Seeds are tiny packets that contain a baby plant and carbohydrates. The baby plant uses the carbohydrates in the seed to grow until it reaches the sunlight and can make new carbohydrates.
  
  

Effects

• Sunlight can either inhibit the germination of seeds or can stimulate it. Seeds that require sunlight for germination are typically planted over the surface of soil. Seeds that need darkness for growth are planted more deeply.
  
  

Expert Insight

• When purchasing vegetable seeds, check the packaging for information on the seed's planting depth. This is usually an indicator as to which seeds germinate best in the dark.