Growing mediums are considered to be any material which a plant grows in. Soil is the growing medium used in traditional cultivation. However, when dealing with hydroponics you are not limited to only soil. A growing medium is used to provide plants' roots with the moisture and oxygen they need.
2.5 cubic ft:
1.5 cubic ft:
1.75 cubic ft:
12 qt: $11.99, 2 cubic ft:
12 qt: $11.99, 1.5 cubic ft:
4 cubic ft:
3.8 cubic ft: