The material that your plants grow in is called the Growing medium.
It is most important in Organic Vegetable Gardening.
It has three main functions:
1) supply roots with nutrients, air, and water,
2) allow for maximum root growth, and
3) physically support the plant.
This is to ensure that the soil is perfect for you to condition into a vegetable garden.
The Physical Properties of the Growing Media is that it balance between air content and available water is one of the most important requirements of good media. Every growing medium has a properties particle size distribution.
Different Types of Growing Media
1)Garden soil
2)commercial soil
3)sand