Exo Terra Plantation Soil, 8 qt. 12 pack (4 x 3pk) In the wild, reptiles burrow to hide, sleep and relieve stress. Exo Terra Substrate is all natural and provides perfect coverage. A vital part of keeping the microclimate in your pet's terrarium balanced and provides nutrition to live plants Ideal for natural terrarium set-ups and perfect for humidity-loving reptiles Stimulates natural digging and burrowing behavior Nutritional substrate for live plants