{"id":3185,"date":"2019-09-11T00:11:53","date_gmt":"2019-09-11T07:11:53","guid":{"rendered":"https:\/\/depts.washington.edu\/hortlib\/pal\/pal-question-817\/"},"modified":"2023-08-09T09:50:07","modified_gmt":"2023-08-09T16:50:07","slug":"grape-vine-producing-uneven-fruit-sets","status":"publish","type":"pal","link":"https:\/\/depts.washington.edu\/hortlib\/pal\/grape-vine-producing-uneven-fruit-sets\/","title":{"rendered":"grape vine producing uneven fruit sets"},"content":{"rendered":"<p><strong>What causes some grapes to get to normal size and others to stay small? This is on a Concord vine about 7-8 years old.<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>Some varieties of grape produce naturally straggly clusters of fruit. According to <em>The Grape Grower: A Guide to Organic Viticulture<\/em> by Lon Rombough (Chelsea Green, 2002), Concord has a tendency to ripen unevenly in hot climates (such as the mid-South), but he doesn&#8217;t note straggly clusters as a characteristic of this variety. That makes me think the uneven size of your fruit is more to do with pollination. See the following, from <a href=\"https:\/\/grapes.extension.org\/causes-of-poor-fruit-set-in-grapes\/\">Oregon State University Extension<\/a>, which suggests that a cool, wet spell around the time of bloom can interfere with pollination and result in large numbers of unset berries. Rain, which also inhibits pollination, can also be a factor in poor fruit set.<\/p>\n<p>There are other possible reasons for the uneven fruit set. If you are growing a variety of grape which is not ideally suited to your climate, or if the soil is overly rich or overly fertilized, you may not get abundant fruit.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What causes some grapes to get to normal size and others to stay small? This is on a Concord vine about 7-8 years old. &nbsp; Some varieties of grape produce naturally straggly clusters of fruit. According to The Grape Grower: A Guide to Organic Viticulture by Lon Rombough (Chelsea Green, 2002), Concord has a tendency to ripen unevenly in hot climates (such as the mid-South), but he doesn&#8217;t note straggly clusters as a characteristic of this variety. That makes me&#8230;<\/p>\n<div><a class=\"more-link\" href=\"https:\/\/depts.washington.edu\/hortlib\/pal\/grape-vine-producing-uneven-fruit-sets\/\">Continue reading <span class=\"screen-reader-text\">grape vine producing uneven fruit sets<\/span><\/a><\/div>\n","protected":false},"author":4,"featured_media":0,"menu_order":0,"template":"","keyword":[788,405],"class_list":["post-3185","pal","type-pal","status-publish","hentry","keyword-pollination","keyword-vitis"],"acf":[],"_links":{"self":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/pal\/3185"}],"collection":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/pal"}],"about":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/types\/pal"}],"author":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/users\/4"}],"wp:attachment":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/media?parent=3185"}],"wp:term":[{"taxonomy":"keyword","embeddable":true,"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/keyword?post=3185"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}