To draw or take in, roots absorb water and nutrients.
A sour substance, an acid or sour soil has a low pH.
A hydroponic system that actively moves the nutrient solution.
Heavy clay soil that drains slowly - adobe is not suitable for container growing.
Roots that grow from unusual spots, as on the (stem) pericycle or endodermis of an older root - auxins may influence this type of growth.
Growing cannabis plants by misting roots suspended in air.
A substrate that is of nearly uniform size and used for the inert hydroponic medium.