Soil is an earthy substance in which plants can grow. It contains mineral particles mixed with decayed organic matter and is capable of retaining water.

Read all about soil for growing marijuana in these articles:

• Growing Marijuana In Soil
• What is the Best Soil for Growing Marijuana?
• Composition Of The Soil
• Indoor Marijuana Growing In Soil
• Best Soil For Outdoor Marijuana Plants
• Grow Schedule For Soil Growers
• Watering Marijuana Grown In Soil
• Marijuana Growing: Meaning Of pH For The Soil

More grow medium definitions:

Grow medium | Seedling & Cutting soil | Hydroponic | Rockwool | Clay pellets | Coconut fiber | Perlite | Vermiculite | Aeroponic