When you cut the buds off of a grapevine, the wood could still thrive and produce more buds later in the season or the next year. The way you prune a grapevine is essential to protecting the fruit for future harvests. Since grapes do not ripen further after picking, use caution when you time your harvest. The appearance and taste of grapes help you decide good harvesting times. Caring for grapevines is a year-round job that requires you to prune regularly
Pruning Amounts
When you only lightly prune a grapevine, you could affect your harvest for next year. The following year you may only get large quantities of low quality fruit. On the other hand, if you heavily prune the buds of the grapevine, you’ll have large amounts of vegetable, but very low quantities of fruit. Cut back old pieces of the vine left behind to encourage new wood growth. You may have to cut back as much as three to four feet of old wood to keep your grapevines healthy.
Types of Grape Harvests
The type of product you are making with the fruit on the grapevine affects how much cutting should be done. For table grapes, juices and jellies, you could have 40 to 60 buds per grapevine, according to the University of Minnesota Extension. For wine varieties, you should only have 20 to 30 buds after pruning the grapevine. To increase the sugar content and use the grapes for raisins, wait to cut the buds off the vine.
Ripeness
Cutting the buds too early on a grapevine likely will affect the quality of your crop. The grapes are not likely to sweeten once removed from the bud. Wait until they are at the optimal quality before you cut any buds. Taste test the grapes are the preferred method to determine when to cut the fruit from the vine. Fully ripened grapes have a more prominent whitish coat on the exterior skin, according to Purdue University.
Warning
Remove all the stems and branches along with the buds when cutting. If any buds are left behind and not cut, the grapes are likely to become diseased or overripe and become unusable. It is also important to cut buds early when grapes are ripened to prevent your fruit becoming a bird’s meal. If birds are a problem and the buds are not ready for cutting, place a net over the vines to protect the fruit.
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