The study of geological agriculture is in its infancy, so To Soil Less serves to help lead the way in this approach of using gravel and sand to grow flowers, fruits, and vegetables.

Geological Agriculture is the process of growing fruits, vegetables and flowers in rock environments. Known also as geo-agriculture or gravel gardening, this method of cultivating crops enables vegetation to occur and sustain itself with limited to no use of soil and fertilizers. Gravel agriculture is another term applicable and
appropriate to apply.

When you combine a few geological and agricultural definitions together, it becomes quite simple…

Lithification -The process of converting soft, unconsolidated sediments into
hard rock.
Sedimentary rocks -Types of rock that are formed by the deposition of material at the Earth’s surface and within bodies of water.
Soil–The portion of the Earth’s surface consisting of disintegrated rock and humus.
Hydrology –The scientific study of the properties, distribution and effects of water on the Earth’s surface, in the soil and underlying rocks, and in the atmosphere.
Nitrogen fixation –The process by which free nitrogen from the air is combined with other elements to form inorganic compounds.

Basically, sedimentary rocks is composed of the sediment of the sea or dead organic life such as fish or plants. When these rocks are impacted with water, minerals and nutrients leach out of the rock into the available moisture which can feed root systems. Water is maintained in the system due to the condensation properties of the gravel and sand, which enables water to be stored and used over a period of time.