A support device comprises a substrate support member 14, the substrate support member 14 being provided with or defining an opening or recess 24 through which a truss support member 26 extends, the truss support member 26 including a screw threaded section with which a pair of threaded adjustment members 28 cooperate, at least part of the substrate support member 14 being located between the threaded adjustment members 28, the truss support member 26 further defining a support tape engagement region 30 with which a truss support tape (32, figure 1) cooperates, in use. The device may be used in the cultivation of strawberries.