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Hi,
If you have lots of wind your trellisses should be parallel to
the dominant wind not accross it, so that wind runs down the rows. Apparently in
windy areas, it makes a big difference for hardiness and production. (This
opinion is based on reading a book on the introduction of white grapes in South
Africa, at the turn of the century).
You did not mention your climate zone. The height of your
grapes is dependant on climate. In Southern France for instance, the wine grapes
are trelisses fairly high (5 to 6 feet), while in the areas around the river la
Loire south of Paris but further north as far as climate goes, the wine
grapes are trelisses to grow low (3-4 feet), while in Canada (let's say zone 5)
some varieties are layed down on the ground under the snow for winter. (This
opinion is based on having visited many vineyards all over France and seeing how
the Italians in Ottawa are growing their Sicilian grapes).
This is what comes to mind reading your post.
Good luck!
Hélène, zone 3-4 north of Ottawa.
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