{"id":9827,"date":"2020-04-20T14:58:34","date_gmt":"2020-04-20T18:58:34","guid":{"rendered":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/?p=9827"},"modified":"2020-04-20T16:11:57","modified_gmt":"2020-04-20T20:11:57","slug":"assessing-freeze-injury-on-horticultural-plants","status":"publish","type":"post","link":"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/assessing-freeze-injury-on-horticultural-plants\/","title":{"rendered":"Assessing Freeze Injury on Horticultural Plants"},"content":{"rendered":"<p>As so many gardeners are staying at home these days, we\u2019ve had more opportunity to enjoy the spring display. And then, perhaps inevitably, \u201cnormal\u201d spring frost and freeze visited. Some plants are vulnerable to damage. The amount of damage will depend on how far along they are in their development.<\/p>\n<p>Home fruit-growers may have reason to be concerned: At 28 F, you can expect a 10 percent loss of flowers\/young developing fruit. However, at 25 F that loss increases to 90 percent! Much of Indiana dropped to the mid 20s on the mornings of April 15 and 16.<\/p>\n<div id=\"attachment_9830\" style=\"width: 310px\" class=\"wp-caption aligncenter\"><a  href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Fig-1-Freeze-Map-16-April-2020.png\" data-rel=\"lightbox-gallery-0\" data-rl_title=\"Temperatures across the region the morning of April 16, 2020 (Midwest Climate Watch, Midwestern Regional Climate Center\" data-rl_caption=\"\" title=\"Temperatures across the region the morning of April 16, 2020 (Midwest Climate Watch, Midwestern Regional Climate Center\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9830\" class=\"size-medium wp-image-9830\" src=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Fig-1-Freeze-Map-16-April-2020-300x225.png\" alt=\"Colored regional map showing the low temperature over the 24-hour period ending the morning of April 16, 2020. The different colors indicate the temperatures in 10 degree increments. There are 7 different temperature zones represented on this map.\" width=\"300\" height=\"225\" srcset=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Fig-1-Freeze-Map-16-April-2020-300x225.png 300w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Fig-1-Freeze-Map-16-April-2020-768x576.png 768w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Fig-1-Freeze-Map-16-April-2020-313x235.png 313w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Fig-1-Freeze-Map-16-April-2020-31x23.png 31w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Fig-1-Freeze-Map-16-April-2020.png 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-9830\" class=\"wp-caption-text\"><em>Temperatures across the region the morning of April 16, 2020 (Midwest Climate Watch, Midwestern Regional Climate Center<\/em><\/p><\/div>\n<p>For home growers, covering plants with sheets or blankets might provide a few degrees of protection.<\/p>\n<div id=\"attachment_9831\" style=\"width: 310px\" class=\"wp-caption aligncenter\"><a  href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Photo-1-covering-fruit-trees.jpg\" data-rel=\"lightbox-gallery-0\" data-rl_title=\"Covering trees with sheets or blankets can provide a few degrees of protection. (John Obermeyer, Purdue Extension)\" data-rl_caption=\"\" title=\"Covering trees with sheets or blankets can provide a few degrees of protection. (John Obermeyer, Purdue Extension)\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9831\" class=\"size-medium wp-image-9831\" src=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Photo-1-covering-fruit-trees-300x225.jpg\" alt=\"Medium tree with no leaves is shown with white sheets covering three areas of the tree branches. The tree is shown in the front yard of a house in a neighborhood. Can see the street and driveway of house and a house across the street in the background.\" width=\"300\" height=\"225\" srcset=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Photo-1-covering-fruit-trees-300x225.jpg 300w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Photo-1-covering-fruit-trees-768x576.jpg 768w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Photo-1-covering-fruit-trees-313x235.jpg 313w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Photo-1-covering-fruit-trees-31x23.jpg 31w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Photo-1-covering-fruit-trees.jpg 864w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-9831\" class=\"wp-caption-text\"><em>Covering trees with sheets or blankets can provide a few degrees of protection. (John Obermeyer, Purdue Extension)<\/em><\/p><\/div>\n<p>Bud counts were good until the freeze, so in some cases, even just 10 percent retained fruit might still be a decent crop on our tree fruits. Grapes may also still have ability to crop on shoots that have yet to emerge. Strawberries are a bit easier to protect through frost and freeze, but only if you took measures, such as using floating row covers, recovering with straw, etc.<\/p>\n<p>However, it is only mid-April and additional frosts\/freezes are still possible. Bottom line is that unless it is already a complete loss, we won\u2019t really know the rest of the story for quite a few more weeks.<\/p>\n<p>It is easy to check fruit buds for damage by cutting open the bud and looking for dark brown or black centers.<\/p>\n<div id=\"attachment_9832\" style=\"width: 310px\" class=\"wp-caption aligncenter\"><a  href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-2-PeachFruitFreezeInjuryCropped.jpg\" data-rel=\"lightbox-gallery-0\" data-rl_title=\"Freeze-damaged young peach fruit (Bruce Bordelon, Purdue Extension)\" data-rl_caption=\"\" title=\"Freeze-damaged young peach fruit (Bruce Bordelon, Purdue Extension)\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9832\" class=\"size-medium wp-image-9832\" src=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-2-PeachFruitFreezeInjuryCropped-300x225.jpg\" alt=\"Small young peach fruit in the palm of hand that has been cut open to show a black center, indicating freeze damage to the fruit.\" width=\"300\" height=\"225\" srcset=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-2-PeachFruitFreezeInjuryCropped-300x225.jpg 300w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-2-PeachFruitFreezeInjuryCropped-1024x768.jpg 1024w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-2-PeachFruitFreezeInjuryCropped-768x576.jpg 768w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-2-PeachFruitFreezeInjuryCropped-313x235.jpg 313w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-2-PeachFruitFreezeInjuryCropped-31x23.jpg 31w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-2-PeachFruitFreezeInjuryCropped.jpg 1214w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-9832\" class=\"wp-caption-text\"><em>Freeze-damaged young peach fruit (Bruce Bordelon, Purdue Extension)<\/em><\/p><\/div>\n<p>Our Purdue Extension fruit specialists put together these videos to help you assess the status of your fruit plants.<\/p>\n<p>Assessing Spring Freeze Damage to Apples<br \/>\nVideo:\u00a0<a href=\"http:\/\/youtu.be\/YcSRg74Hb_A\">http:\/\/youtu.be\/YcSRg74Hb_A<\/a><\/p>\n<p>Assessing Spring Freeze Damage to Peaches<br \/>\nVideo:\u00a0<a href=\"http:\/\/youtu.be\/DcS2XGAqoFk\">http:\/\/youtu.be\/DcS2XGAqoFk<\/a><\/p>\n<p>Assessing Spring Freeze Damage to Grapes<br \/>\nVideo:\u00a0<a href=\"http:\/\/youtu.be\/lNUZu5Bx08M\">http:\/\/youtu.be\/lNUZu5Bx08M<\/a><\/p>\n<p>Assessing Spring Freeze Damage to Strawberries<br \/>\nVideo:\u00a0<a href=\"http:\/\/youtu.be\/F-QoX1C4_S0\">http:\/\/youtu.be\/F-QoX1C4_S0<\/a><\/p>\n<p>Assessing Spring Freeze Damage to Blackberries<br \/>\nVideo:\u00a0<a href=\"http:\/\/youtu.be\/EyIhvfY2apM\">http:\/\/youtu.be\/EyIhvfY2apM<\/a><\/p>\n<p>For ornamental trees and shrubs, plant response has been quite varied, depending on species, location and, of course, temperature and duration of that temperature. Susceptible plants may have wilted leaves, brown or black necrotic spots on leaves, or perhaps dieback of entire twigs. Plants that were in bloom likely have brown petals or dropped flowers entirely.<\/p>\n<div id=\"attachment_9833\" style=\"width: 235px\" class=\"wp-caption aligncenter\"><a  href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-3-magnolia-flower-freeze-damage-scaled.jpg\" data-rel=\"lightbox-gallery-0\" data-rl_title=\"Magnolia blossom with severe freeze injury (Bruce Bordelon, Purdue Extension)\" data-rl_caption=\"\" title=\"Magnolia blossom with severe freeze injury (Bruce Bordelon, Purdue Extension)\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9833\" class=\"size-medium wp-image-9833\" src=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-3-magnolia-flower-freeze-damage-225x300.jpg\" alt=\"Close up image of a magnolia flower showing severe freeze injury indicated by wilted and curled petals of the flower.\" width=\"225\" height=\"300\" srcset=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-3-magnolia-flower-freeze-damage-225x300.jpg 225w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-3-magnolia-flower-freeze-damage-768x1024.jpg 768w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-3-magnolia-flower-freeze-damage-1152x1536.jpg 1152w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-3-magnolia-flower-freeze-damage-1536x2048.jpg 1536w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-3-magnolia-flower-freeze-damage-176x235.jpg 176w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-3-magnolia-flower-freeze-damage-20x27.jpg 20w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-3-magnolia-flower-freeze-damage-scaled.jpg 1920w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a><p id=\"caption-attachment-9833\" class=\"wp-caption-text\"><em>Magnolia blossom with severe freeze injury (Bruce Bordelon, Purdue Extension)<\/em><\/p><\/div>\n<p>&nbsp;<\/p>\n<div id=\"attachment_9829\" style=\"width: 310px\" class=\"wp-caption aligncenter\"><a  href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-4-Rhododendron-flowers-freeze-injury-rotated.jpg\" data-rel=\"lightbox-gallery-0\" data-rl_title=\"Rhododendron blossom drop due to freeze (John Obermeyer, Purdue Extension)\" data-rl_caption=\"\" title=\"Rhododendron blossom drop due to freeze (John Obermeyer, Purdue Extension)\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9829\" class=\"size-medium wp-image-9829\" src=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-4-Rhododendron-flowers-freeze-injury-300x225.jpg\" alt=\"Rhododendron bush in a bed in front of a house that had been in full bloom showing freeze injury indicated by a majority of the blooms laying on the ground all around the bush.\" width=\"300\" height=\"225\" srcset=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-4-Rhododendron-flowers-freeze-injury-300x225.jpg 300w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-4-Rhododendron-flowers-freeze-injury-1024x768.jpg 1024w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-4-Rhododendron-flowers-freeze-injury-768x576.jpg 768w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-4-Rhododendron-flowers-freeze-injury-1536x1152.jpg 1536w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-4-Rhododendron-flowers-freeze-injury-313x235.jpg 313w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-4-Rhododendron-flowers-freeze-injury-31x23.jpg 31w, https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/photo-4-Rhododendron-flowers-freeze-injury-rotated.jpg 2016w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-9829\" class=\"wp-caption-text\"><em>Rhododendron blossom drop due to freeze (John Obermeyer, Purdue Extension)<\/em><\/p><\/div>\n<p>Note that freeze incidents are normal for this time of year. The good news is that woody plants, in most cases, will outgrow the damage.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>As so many gardeners are staying at home these days, we\u2019ve had more opportunity to enjoy the spring display. And then, perhaps inevitably, \u201cnormal\u201d spring frost and freeze visited. Some plants are vulnerable to damage. The amount of damage will depend on how far along they are in their development. Home fruit-growers may have reason to be concerned: At 28 F, you can expect a 10 percent loss of flowers\/young developing fruit. However, at 25&#8230;<span id=\"post-label-9827\" class=\"sr-only\">Read more about Assessing Freeze Injury on Horticultural Plants<\/span><a class=\"read-more\" href=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/assessing-freeze-injury-on-horticultural-plants\/\" aria-labelledby=\"post-label-9827\">[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":[15,19,21,22,23,25],"tags":[],"coauthors":[46],"class_list":["post-9827","post","type-post","status-publish","format-standard","hentry","category-gardening","category-plants","category-seasonal-information","category-shrubs","category-spring","category-trees","publication-spring-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>Assessing Freeze Injury on Horticultural Plants - 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\/assessing-freeze-injury-on-horticultural-plants\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Assessing Freeze Injury on Horticultural Plants - Indiana Yard and Garden - Purdue Consumer Horticulture\" \/>\n<meta property=\"og:description\" content=\"As so many gardeners are staying at home these days, we\u2019ve had more opportunity to enjoy the spring display. And then, perhaps inevitably, \u201cnormal\u201d spring frost and freeze visited. Some plants are vulnerable to damage. The amount of damage will depend on how far along they are in their development. Home fruit-growers may have reason to be concerned: At 28 F, you can expect a 10 percent loss of flowers\/young developing fruit. However, at 25...Read more about Assessing Freeze Injury on Horticultural Plants[Read More]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/assessing-freeze-injury-on-horticultural-plants\/\" \/>\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=\"2020-04-20T18:58:34+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-04-20T20:11:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.purdue.edu\/hla\/sites\/yardandgarden\/wp-content\/uploads\/sites\/2\/2020\/04\/Fig-1-Freeze-Map-16-April-2020-300x225.png\" \/>\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\\\/assessing-freeze-injury-on-horticultural-plants\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/assessing-freeze-injury-on-horticultural-plants\\\/\"},\"author\":{\"name\":\"Rosie Lerner\",\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/#\\\/schema\\\/person\\\/477baba12dde3a697415f60d785c9b1b\"},\"headline\":\"Assessing Freeze Injury on Horticultural Plants\",\"datePublished\":\"2020-04-20T18:58:34+00:00\",\"dateModified\":\"2020-04-20T20:11:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/assessing-freeze-injury-on-horticultural-plants\\\/\"},\"wordCount\":505,\"publisher\":{\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/assessing-freeze-injury-on-horticultural-plants\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2020\\\/04\\\/Fig-1-Freeze-Map-16-April-2020-300x225.png\",\"articleSection\":[\"Gardening\",\"Plants\",\"Seasonal Information\",\"Shrubs\",\"Spring\",\"Trees\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/assessing-freeze-injury-on-horticultural-plants\\\/\",\"url\":\"https:\\\/\\\/www.purdue.edu\\\/hla\\\/sites\\\/yardandgarden\\\/assessing-freeze-injury-on-horticultural-plants\\\/\",\"name\":\"Assessing Freeze Injury on Horticultural Plants - 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