The Goblet System of Growing Grapes
The aim here is to produce a vine shaped like an open bush. The rods are allowed to grow naturally for the first year after planting. The rods are then cut back to within two buds of their base in January.
In the spring choose the stoutest and strongest growth and tie this perpendicularly to a stake. Cut out all other growths and concentrate on this one. Do not carry out any summer pruning, just let this strong rod develop naturally. Next January cut this rod back to within 3 buds of its base. When the 3 buds grow out, keep them, tying them to stakes or bamboos so as to form a goblet shape. Do not do any summer pruning.
The leaves of the vines grown against walls are often attacked by Red Spiders, and the answer here is to syringe the under surface of the foliage in the evening, twice a week, from the beginning of June onwards. In cases of bad attack some liquid derris should be added to the water.
Red Spiders can be detected by examining the back of the leaf with a magnifying glass. Red Spider is a bad name. Yellow Mite would be better.
Some people give each vine one stake, 4 feet out of the ground, and then, instead of tying the rods out to ‘form a goblet, they merely tie the tips of the rods to the top of the stakes to form an inverted cone. By the way, do not allow the young cane to go on growing after the requisite number of bunches of grapes have been produced. You should always pinch out the growing point at 3 leaves beyond the top hunch.
When growing a vine against a wall the pruning may be similar. The rod instead of being taken along a lower wire can be trained, with a main rod growing upwards and with side permanent rods trained out at right angles. Thus a series of horizontal cordons are formed and the laterals they produce are pruned back hard each January. These are tied to wires stretched tightly in between the main wires.
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