Patent ID: 6477805
Filing Date: 2002-11-12
Classification: A01G,Y02P

Abstract:
A plant growth unit comprising:(a) a nutrient supply module able to contain a liquid nutrient; (b) one or more columns radially disposed about a central vertical longitudinal axis defining an internal space between the one or more columns, the internal space being adapted to accommodate a light source, each column having an upper portion, a lower portion and a longitudinal passage through which the liquid nutrient may pass, and each column being in fluid communication with the nutrient supply module for circulation of a liquid nutrient flow from the nutrient supply module to the upper portion of each of the one or more the columns and through the longitudinal passage to the respective lower portion of each of the one or more columns; and (c) a plurality of growth sites supported by the one or more columns, the growth sites being radially disposed about the longitudinal axis and generally facing the internal space, each growth site being positioned to contact the liquid nutrient flow.