{"id":9946,"date":"2020-08-19T15:25:10","date_gmt":"2020-08-19T19:25:10","guid":{"rendered":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/?p=9946"},"modified":"2020-08-25T15:49:54","modified_gmt":"2020-08-25T19:49:54","slug":"blossom-end-rot-frustrates-tomato-growers","status":"publish","type":"post","link":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/blossom-end-rot-frustrates-tomato-growers\/","title":{"rendered":"Blossom-End Rot Frustrates Tomato Growers"},"content":{"rendered":"<p>Eager tomato growers, having lovingly nurtured their plants, anxiously await their ripe gems. But alas, a black, leathery spot appears at the base of the fruit.<\/p>\n<div id=\"attachment_9951\" style=\"width: 310px\" class=\"wp-caption aligncenter\"><a  href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/Figure-21.39-Tomato-Blossom-End-Rot-Tom-Creswell.jpg\" data-rel=\"lightbox-gallery-0\" data-rl_title=\"Variable symptoms of blossom-end rot on tomato Credit: Tom Creswell, Purdue Extension\" data-rl_caption=\"\" title=\"Variable symptoms of blossom-end rot on tomato Credit: Tom Creswell, Purdue Extension\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9951\" class=\"size-medium wp-image-9951\" src=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/Figure-21.39-Tomato-Blossom-End-Rot-Tom-Creswell-300x227.jpg\" alt=\"Black spots on the bottom of the tomato fruits.\" width=\"300\" height=\"227\" srcset=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/Figure-21.39-Tomato-Blossom-End-Rot-Tom-Creswell-300x227.jpg 300w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/Figure-21.39-Tomato-Blossom-End-Rot-Tom-Creswell-1024x776.jpg 1024w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/Figure-21.39-Tomato-Blossom-End-Rot-Tom-Creswell-768x582.jpg 768w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/Figure-21.39-Tomato-Blossom-End-Rot-Tom-Creswell-310x235.jpg 310w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/Figure-21.39-Tomato-Blossom-End-Rot-Tom-Creswell-31x23.jpg 31w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/Figure-21.39-Tomato-Blossom-End-Rot-Tom-Creswell.jpg 1037w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-9951\" class=\"wp-caption-text\"><em>Variable symptoms of blossom-end rot on tomato<\/em><br \/><em>Credit: Tom Creswell, Purdue Extension<\/em><\/p><\/div>\n<div id=\"attachment_9950\" style=\"width: 225px\" class=\"wp-caption alignright\"><a  href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BERPurdueTomatoDocApp.jpg\" data-rel=\"lightbox-gallery-0\" data-rl_title=\"Blossom-end rot on tomato fruit Credit: Purdue Tomato Doctor App\" data-rl_caption=\"\" title=\"Blossom-end rot on tomato fruit Credit: Purdue Tomato Doctor App\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9950\" class=\"size-medium wp-image-9950\" src=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BERPurdueTomatoDocApp-215x300.jpg\" alt=\"Larger image of the black spot on bottom of tomato fruit\" width=\"215\" height=\"300\" srcset=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BERPurdueTomatoDocApp-215x300.jpg 215w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BERPurdueTomatoDocApp-168x235.jpg 168w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BERPurdueTomatoDocApp-19x27.jpg 19w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BERPurdueTomatoDocApp.jpg 687w\" sizes=\"auto, (max-width: 215px) 100vw, 215px\" \/><\/a><p id=\"caption-attachment-9950\" class=\"wp-caption-text\"><em>Blossom-end rot on tomato fruit<\/em><br \/><em>Credit: Purdue Tomato Doctor App<\/em><\/p><\/div>\n<p>Blossom end-rot is thankfully not an infectious disease, but rather a frustrating disorder of the fruit. The black scar tissue is thought to be caused by a deficiency of calcium in the developing fruit.<\/p>\n<p>In most cases, blossom end-rot is brought on by extreme fluctuations in soil moisture. And this year we sure had extremes of rainfall, so blossom-end rot is likely to be prevalent.<\/p>\n<p>The black or brown spot develops on the blossom-end of the fruit opposite the point of stem attachment, thus the name blossom-end rot. The scar is usually firm and leathery, although secondary rot organisms may enter through the damaged tissue, causing a soft rot to develop.\u00a0 Often it\u2019s the early forming fruit that are affected, but it can happen anytime.<\/p>\n<div id=\"attachment_9952\" style=\"width: 310px\" class=\"wp-caption alignleft\"><a  href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BER-Pepper-VCH.jpg\" data-rel=\"lightbox-gallery-0\" data-rl_title=\"Blossom-end rot on pepper fruit Credit: Wenjing Guan, Purdue Extension\" data-rl_caption=\"\" title=\"Blossom-end rot on pepper fruit Credit: Wenjing Guan, Purdue Extension\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9952\" class=\"size-medium wp-image-9952\" src=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BER-Pepper-VCH-300x225.jpg\" alt=\"Brown discoloration on the bottom of the pepper fruit\" width=\"300\" height=\"225\" srcset=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BER-Pepper-VCH-300x225.jpg 300w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BER-Pepper-VCH-1024x768.jpg 1024w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BER-Pepper-VCH-768x576.jpg 768w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BER-Pepper-VCH-1536x1152.jpg 1536w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BER-Pepper-VCH-313x235.jpg 313w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BER-Pepper-VCH-31x23.jpg 31w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/BER-Pepper-VCH.jpg 1600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-9952\" class=\"wp-caption-text\"><em>Blossom-end rot on pepper fruit<\/em><br \/><em>Credit: Wenjing Guan, Purdue Extension<\/em><\/p><\/div>\n<p>Tomatoes aren\u2019t the only species affected by blossom-end rot; peppers, summer squash, and other cucurbit plants can also be afflicted.<\/p>\n<p>There is no spray that will control blossom-end rot, except maybe from the irrigation hose. Some folks recommend spraying the plants with calcium, but by the time you see the scar on the fruit, it is too late. Most Indiana soils have plenty of calcium, although some sandy soils may be deficient.<\/p>\n<p>Watering during dry spells and mulching to conserve soil moisture will help reduce the fluctuations in soil moisture and thus encourage steady growth and calcium supply in the fruits.<\/p>\n<p>Although the fruits that have already developed the scar cannot be helped, the new developing fruits can be. You can cut away the affected portion of the fruit and use the rest, but avoid using any damaged fruits for canning.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Eager tomato growers, having lovingly nurtured their plants, anxiously await their ripe gems. But alas, a black, leathery spot appears at the base of the fruit. Blossom end-rot is thankfully not an infectious disease, but rather a frustrating disorder of the fruit. The black scar tissue is thought to be caused by a deficiency of calcium in the developing fruit. In most cases, blossom end-rot is brought on by extreme fluctuations in soil moisture. And&#8230;<span id=\"post-label-9946\" class=\"sr-only\">Read more about Blossom-End Rot Frustrates Tomato Growers<\/span><a class=\"read-more\" href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/blossom-end-rot-frustrates-tomato-growers\/\" aria-labelledby=\"post-label-9946\">[Read More]<\/a><\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[15,19,21,24,26],"tags":[],"coauthors":[46],"class_list":["post-9946","post","type-post","status-publish","format-standard","hentry","category-gardening","category-plants","category-seasonal-information","category-summer","category-vegetables","publication-summer-gardening-stories","publication-yard-and-garden-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Blossom-End Rot Frustrates Tomato Growers - Indiana Yard and Garden - Purdue Consumer Horticulture<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/blossom-end-rot-frustrates-tomato-growers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Blossom-End Rot Frustrates Tomato Growers - Indiana Yard and Garden - Purdue Consumer Horticulture\" \/>\n<meta property=\"og:description\" content=\"Eager tomato growers, having lovingly nurtured their plants, anxiously await their ripe gems. But alas, a black, leathery spot appears at the base of the fruit. Blossom end-rot is thankfully not an infectious disease, but rather a frustrating disorder of the fruit. The black scar tissue is thought to be caused by a deficiency of calcium in the developing fruit. In most cases, blossom end-rot is brought on by extreme fluctuations in soil moisture. And...Read more about Blossom-End Rot Frustrates Tomato Growers[Read More]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/blossom-end-rot-frustrates-tomato-growers\/\" \/>\n<meta property=\"og:site_name\" content=\"Indiana Yard and Garden - Purdue Consumer Horticulture\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Purdue-Home-Hort-716960998353855\/\" \/>\n<meta property=\"article:published_time\" content=\"2020-08-19T19:25:10+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-08-25T19:49:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/08\/Figure-21.39-Tomato-Blossom-End-Rot-Tom-Creswell-300x227.jpg\" \/>\n<meta name=\"author\" content=\"Rosie Lerner\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@PurdueHomeHort\" \/>\n<meta name=\"twitter:site\" content=\"@PurdueHomeHort\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rosie Lerner\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/blossom-end-rot-frustrates-tomato-growers\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/blossom-end-rot-frustrates-tomato-growers\\\/\"},\"author\":{\"name\":\"Rosie Lerner\",\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/#\\\/schema\\\/person\\\/477baba12dde3a697415f60d785c9b1b\"},\"headline\":\"Blossom-End Rot Frustrates Tomato Growers\",\"datePublished\":\"2020-08-19T19:25:10+00:00\",\"dateModified\":\"2020-08-25T19:49:54+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/blossom-end-rot-frustrates-tomato-growers\\\/\"},\"wordCount\":352,\"publisher\":{\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/blossom-end-rot-frustrates-tomato-growers\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2020\\\/08\\\/Figure-21.39-Tomato-Blossom-End-Rot-Tom-Creswell-300x227.jpg\",\"articleSection\":[\"Gardening\",\"Plants\",\"Seasonal Information\",\"Summer\",\"Vegetables\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/blossom-end-rot-frustrates-tomato-growers\\\/\",\"url\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/blossom-end-rot-frustrates-tomato-growers\\\/\",\"name\":\"Blossom-End Rot Frustrates Tomato Growers - 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But alas, a black, leathery spot appears at the base of the fruit. Blossom end-rot is thankfully not an infectious disease, but rather a frustrating disorder of the fruit. The black scar tissue is thought to be caused by a deficiency of calcium in the developing fruit. In most cases, blossom end-rot is brought on by extreme fluctuations in soil moisture. 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