How do I take care of a grape vine?

the grape vine is overgrown and it is spring- I am wondering if I need to trim it back for it to grow.

How do I take care of a grape vine?
http://www.uri.edu/ce/factsheets/sheets/...





Establishment:





Three years are normally required to establish a grape planting. Vines planted for training on a trellis are normally placed 8 feet apart, while those planted for training on an arbor can be placed 4 feet apart. Before growth begins the second year, a support for the vines--either a trellis or an arbor--must be provided.





Care of vines the second year is similar to that of the first year. A system for training the vines should be selected during the second year. Vines are trained to a particular system by pruning and tying the canes to the support system. In some methods of training grapevines, the canes are tied to wires above the trunk and arms of the vines. Such training works well where grapevines are to be grown on a fence or in an upright position. In another method of training, the canes are tied to the wires and the fruit bearing shoots are allowed to droop or hang down. A third method is the cordon type training system. Here the fruiting canes are developed from a horizontal extension of the trunk called a cordon. If canes are pruned long, they can be tied to the lower wires. If pruned short, they hang free. One of the most common training systems is called the single curtain/cordon bilateral system.





Pruning and Training:





Annual pruning is important in maintaining a uniform yearly production of quality fruit. The best time to prune grapevines is in the dormant season after all danger of severe cold weather. Learning to prune grapevines requires practice and experience.





Fertilizer and Lime:





Grapes perform best where the soil pH is between 5.0 and 6.0. Apply lime only when soil analysis indicates a need. Apply 8 ounces of 10-10-10 fertilizer per plant seven days after planting. Increase the amount of fertilizer to 1 pound of 10-10-10 in the second year and 1 1/2 pounds per vine in the third and later years, approximately 30 days before new growth begins in the spring. Do not concentrate fertilizer at the base of the trunk; keep fertilizer 6 to 12 inches from the trunk and spread evenly under the spread of the vine.





During the third season, some harvest may be expected from the vines. The first full crop, however, will not be produced until about the fourth or fifth year.





Cultural Practices:





It is important that cultural practices of maintaining soil fertility, weed control, soil moisture conservation and insect and disease control be continued not only during the third year, but in subsequent years as well. Control weeds by hand hoeing or with plastic or organic mulch. A clean area 11/2 to 2 feet on each side of the vine is necessary. Do not damage trunks with a hoe or chemicals.





Selecting disease tolerant cultivars, good sanitation practices, managing vine canopies for good air movement, pest scouting and an effective spray program are all part of a successful pest management program. Common grape diseases are black rot, downy mildew, powdery mildew, phomopsis cane and leaf spot and botrytis bunch rot or gray rot. Significant insect and mite pests on grapes are grape berry moth, Japanese beetle, grape flea beetle, European red mite, grape root borer and grape phylloxera.
Reply:Here is a website that explains grape vine pruning...

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