The technique of growing plants (especially tomatoes and chrysanthemums) in a bottomless cylinder containing soil resting on an inert bed, typically of gravel or ash, through which water is provided.
Origin
1950s.
Definition of ring culture in US English:
ring culture
noun
Horticulture
The technique of growing plants (especially tomatoes and chrysanthemums) in a bottomless cylinder containing soil resting on an inert bed, typically of gravel or ash, through which water is provided.