My Concord Grape Vines Will Not Bloom or Bear Fruit. Why?
I live in the midwest. I pruned the vines severely but—all vine no fruit?? Any ides would be welcome.
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Irrigation can play a role too, including fertilizer types.
For pruning, check out this site:
http://www.uga.edu/fruit/grape.html
"Grape Pruning Basics. Grapes are pruned more severely and methodically than any other fruit crop. Pruning not only controls vine growth, but sets crop load as well. Without severe, annual pruning, grape vines become tangled masses of unproductive shoots that decline in yield and quality very quickly. A considerable amount of research and time-honored practice has been devoted to vine pruning, and the following is a condensation of a considerable amount of literature. A few important points:
• Pruning is done in the late winter when vines are dormant.
• Pruning involves ONLY last year’s growth, or one-year-old shoots. Vine form is accomplished by training (see below).
• Balanced pruning is a method of determining the severity or amount of one-year-old wood to remove. One "balances" next year’s crop load with last year’s vigor. It eliminates the need for fruit thinning in most cases. Early research showed that the amount of buds to be left after pruning could be determined on a simple formula that employs the weight of shoots pruned. To start, the pruner removes about 90% of previous season’s growth, then bundles and weighs it (or estimates its weight). For a given grape type, about 20 buds are retained for the first lb of prunings, and 10-20 additional buds are retained for each additional pound of prunings.
• Placement of cuts involves the choices of spur versus cane lengths of pruned shoots, with the former a shorter stub than the latter.
Spur vs. Cane Pruning. Once the number of buds per vine is calculated from the formula, one must decide whether to leave the requisite number on several short stubs, or on just a few longer shoots. Short stubs with few buds are referred to as spurs, whereas longer pieces of one-year-old wood are referred to as canes. In general, spur pruning is for use on:
• Cultivars with fruitful basal buds (i.e., the buds at the base of one-year-old wood will produce fruit clusters instead of only leaves)
• Cultivars that are excessively vigorous
• Wine cultivars where quality is more important than quantity"
you may of overpruned.try looking up the web site for jerry baker.he’s known as americas master gardner.
Try applying fertilizer and cultivate around the base. Keep the soil moist especially during summer time. I live in Dallas, Texas.
I did this last year and the birds have harvested a lot of delicious grapes.
Good Luck!