Ideally any woody plant (that includes woody vines like grapes) should not be pruned back more than a third of the total cane growth in any year. Early March is the perfect time of year to prune your grapevine; pruning at this time is called dormant pruning. The majority of the severe winter weather, which can be hard on plant tissue at a fresh pruning cut, is over but before bud-break or sap flow in the spring. For more information, see the Colorado Grape Growers' Guide.
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I have an old grapevine growing along my fence here in Colorado. How far can I trim back the vine and not damage it (span of 40 ft), and should I do it before it buds?
Last Updated: March 16, 2012
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