WHAT IS THE GENEVA DOUBLE CURTAIN?
The Geneva Double Curtain (GDC) requires a 3-dimensional trellis appliance (each post is a “T” and the “top wire” is really two parallel wires which run down the row at the two ends of the top of the “T”). Therefore; the vines can be “cordoned out” on either of the 2 wires. This trellis appliance requires extra hardware, labor & maintenance. What is usually done in a GDC, is that the vines are trained in an alternating fashion, with the cordons of vine one on the left top wire, the cordons of vine two on the right top wire, etc, etc.. alternating all down the row (all odd numbered vines in the row are trained to the left top wire, while all even numbered vines in the row are trained to the right top wire). Therefore; in the GDC the vines are trained to a high-wire bilateral cordon which has very long cordons that are pruned to several short canes. Note that in this system, the grower can have cordons longer that the vine spacing width because the cordons can alternately be trained to d
