Vine plants are layered along a row of vine plants supported in growing media in a vine crop by a vine planet supporting system suspended from an overhead building structure locating the vine crop therein. The system includes a track extending in a longitudinal direction along the row of vine plants spaced above the growing media. A spool body supporting a string wound thereon is associated with each vine plant to support the vine plant extending along the string. A carrier body slidable along the track supports each spool body on the track. The spool bodies are coupled to the track such that the spool bodies are each arranged to unwind the string therefrom responsive to displacement of the spool body with the respective carrier body in the direction of the row of vine plants.
