Organic or inorganic plant foods, which may be either liquid or granular, used to amend the soil in order to improve the quality or quantity of plant growth.
Growing regions designated by the US Department of Agriculture (USDA) which divides the United States and southern Canada into 11 planting zones based on a 10 degree Fahrenheit difference in the average annual minimum temperatures. Using these zones as a guide, seed companies and nurseries label their horticultural products based on which zones plants will grow most successfully in. Higher numbered zones are generally warmer.
Earthworm feces; the voided earth and other waste materials that are deposited on the surface of the ground. Not all species form their casts above ground.
