{"id":3746,"date":"2026-09-26T19:34:01","date_gmt":"2026-09-26T19:34:01","guid":{"rendered":"https:\/\/www.tomat-pomidor.com\/en\/?p=3746"},"modified":"2026-09-26T19:34:01","modified_gmt":"2026-09-26T19:34:01","slug":"why-store-bought-onions-rot-fast","status":"publish","type":"post","link":"https:\/\/www.tomat-pomidor.com\/en\/why-store-bought-onions-rot-fast\/","title":{"rendered":"Why Store-Bought Onions Rot Fast (And How Long Homegrown Bulbs Last)"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;3746&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;0&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;0&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this&quot;,&quot;legend&quot;:&quot;0\\\/5 - (0 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Why Store-Bought Onions Rot Fast (And How Long Homegrown Bulbs Last)&quot;,&quot;width&quot;:&quot;0&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            <span class=\"kksr-muted\">Rate this<\/span>\n    <\/div>\n    <\/div>\n<p><!-- Title: Why Store-Bought Onions Rot Fast (And How Long Homegrown Bulbs Last) Tags: Storing Onions, Onion Harvest, Overwintering Onions, Thrips Damage, Homegrown vs Store Bought --><\/p>\n<div class=\"tldr-box\" style=\"background: #f4f9f4; padding: 20px; border-left: 5px solid #4CAF50; margin-bottom: 30px; border-radius: 4px;\">\n<h3>\ud83d\udccc Quick Summary: Homegrown Onion Storage<\/h3>\n<ul>\n<li>\ud83e\uddc5 <strong>The Shelf Life:<\/strong> Even if you harvest onions during a wet summer and have to peel them down to their white scales (removing the protective papery skin) due to thrips damage, they can still successfully store indoors from July all the way until May!<\/li>\n<li>\ud83c\udf21\ufe0f <strong>Storage Conditions:<\/strong> You don&#8217;t always need a cold root cellar. Many growers successfully store their onion harvest in slatted crates on the floor of a warm utility room or boiler room (as long as it stays dry).<\/li>\n<li>\ud83d\uded2 <strong>Store-Bought vs. Homegrown:<\/strong> Supermarket onions often rot incredibly fast at home because they have been in cold storage for months. Once brought into a warm kitchen, the sudden temperature change triggers condensation and rapid rotting.<\/li>\n<\/ul>\n<\/div>\n<div class=\"add-review-cta\" style=\"margin: 20px 0; padding: 15px; background: #f9f9f9; border-left: 4px solid #4CAF50; border-radius: 4px;\"><strong>\ud83d\udcac How long does your onion harvest last into the spring?<\/strong> <a href=\"#wpdcom\">Share your storage secrets below!<\/a><\/div>\n<div class=\"forum-post\">\n<div class=\"author-header\">\n<div class=\"forum-avatar\">R<\/div>\n<div class=\"author-meta\">\n<div class=\"author-name\">Russi (Anna) <span class=\"author-stats\">\u2b50 Pro Grower (1,275 posts)<\/span><\/div>\n<div class=\"author-geo\">\ud83d\udccd Ramensky District, Moscow (USDA Zone 4b) | \ud83d\udcc5 May 3, 2021<\/div>\n<\/div>\n<\/div>\n<div class=\"post-content\">I was prepping dinner yesterday and pulled out some of my stored onions. Yes, some of the bulbs have sprouted heavily, some have rotted, and there is evidence of thrips. I originally had to harvest these bulbs in the pouring rain, the skins were completely wet, and I actually had to peel them all the way down to the bare white scales to clean them.But overall, considering I harvested this onion crop back in July, having them still usable in early May is pretty good! I still have a few pounds left. I just store them in a simple slatted crate sitting on the floor of my boiler room, and it gets quite warm in there.<\/p>\n<p>But for some reason, whenever I buy onions from the grocery store, they rot in my house almost instantly!<\/p>\n<p><img decoding=\"async\" style=\"max-width: 100%; height: auto; margin-top: 10px;\" src=\"https:\/\/www.tomat-pomidor.com\/uploads\/monthly_2021_05\/IMG_20210502_184728.jpg.4fd9b3bf4a2a3b69a317098a07ee6043.jpg\" alt=\"Homegrown onions stored until May\" \/><br \/>\n<img decoding=\"async\" style=\"max-width: 100%; height: auto; margin-top: 10px;\" src=\"https:\/\/www.tomat-pomidor.com\/uploads\/monthly_2021_05\/IMG_20210502_185144.jpg.b3d68af20903af6b3ae02b552a9918e4.jpg\" alt=\"Peeled white onions after winter storage\" \/><\/p>\n<\/div>\n<\/div>\n<div class=\"forum-post\">\n<div class=\"author-header\">\n<div class=\"forum-avatar\">A<\/div>\n<div class=\"author-meta\">\n<div class=\"author-name\">Aleksan9ra (Ludmila) <span class=\"author-stats\">\u2b50 Pro Grower (15,056 posts)<\/span><\/div>\n<div class=\"author-geo\">\ud83d\udccd Moscow Region (USDA Zone 4b) | \ud83d\udcc5 May 3, 2021<\/div>\n<\/div>\n<\/div>\n<div class=\"post-content\">Anya, my onion situation is almost identical, I still have a few pounds left over too. The onions at the grocery store look really good right now, but you definitely shouldn&#8217;t buy them in bulk to stock up.It rained here all night, and now it is incredibly warm, almost muggy and steamy outside. Though they are forecasting another cold snap tomorrow.<\/p>\n<p>I finally planted my lettuce and parsley seedlings out into the garden beds under row covers today. Inside the greenhouse, I planted watermelons and cantaloupes down the center bed. They are still tiny, just pushing out their cotyledon leaves.<\/p>\n<p>My cucumbers sprouted, all 15 of them! I germinated them under natural conditions (warm during the day, cold at night). Now I&#8217;ll watch the weather and move them out to the open garden, but only after I finish planting the potatoes.<\/p>\n<p>Oh, and my peas just started sprouting after that warm rain!<\/p>\n<\/div>\n<\/div>\n<div id=\"editor-note\" class=\"editor-note\" style=\"background: #eef7ff; padding: 20px; border-left: 5px solid #2196F3; margin-top: 25px; font-size: 1.1em; line-height: 1.6; border-radius: 0 4px 4px 0;\">\n<h4 style=\"margin-top: 0; color: #1565c0;\">\ud83d\udc68\u200d\ud83d\udd2c Editor&#8217;s Botanical Note: The Grocery Store Onion Problem<\/h4>\n<p>Anna&#8217;s observation that her homegrown onions (even heavily peeled ones damaged by thrips) outlast store-bought onions is a very common phenomenon among gardeners! Why does this happen?<\/p>\n<p>Commercial grocery store onions are heavily cured and then placed into massive, climate-controlled cold storage facilities (kept near 32\u00b0F \/ 0\u00b0C) where they sit for months. When you buy them and bring them into a warm, 70\u00b0F (21\u00b0C) kitchen, the sudden temperature shock causes them to &#8220;sweat.&#8221; This microscopic condensation under the papery skin creates the perfect environment for bacteria and mold, causing the onion to rot into mush within a week or two.<\/p>\n<p>Homegrown onions stored at room temperature (like Anna&#8217;s boiler room) never experience this extreme temperature shock, which is why they can sit happily in a crate from July all the way to May!<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udccc Quick Summary: Homegrown Onion Storage \ud83e\uddc5 The Shelf Life: Even if you harvest onions during a wet summer and have to peel them down to their white scales (removing the protective papery skin) due to thrips damage, they can still successfully store indoors from July all the way until May! \ud83c\udf21\ufe0f Storage Conditions: You &#8230; <a title=\"Why Store-Bought Onions Rot Fast (And How Long Homegrown Bulbs Last)\" class=\"read-more\" href=\"https:\/\/www.tomat-pomidor.com\/en\/why-store-bought-onions-rot-fast\/\" aria-label=\"Read more about Why Store-Bought Onions Rot Fast (And How Long Homegrown Bulbs Last)\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":3746,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[645],"tags":[951,949,682,948,950],"class_list":["post-3746","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-onion-and-garlic","tag-homegrown-vs-store-bought","tag-onion-harvest","tag-overwintering-onions","tag-storing-onions","tag-thrips-damage"],"_links":{"self":[{"href":"https:\/\/www.tomat-pomidor.com\/en\/wp-json\/wp\/v2\/posts\/3746","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tomat-pomidor.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tomat-pomidor.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tomat-pomidor.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tomat-pomidor.com\/en\/wp-json\/wp\/v2\/comments?post=3746"}],"version-history":[{"count":2,"href":"https:\/\/www.tomat-pomidor.com\/en\/wp-json\/wp\/v2\/posts\/3746\/revisions"}],"predecessor-version":[{"id":3748,"href":"https:\/\/www.tomat-pomidor.com\/en\/wp-json\/wp\/v2\/posts\/3746\/revisions\/3748"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tomat-pomidor.com\/en\/wp-json\/wp\/v2\/posts\/3746"}],"wp:attachment":[{"href":"https:\/\/www.tomat-pomidor.com\/en\/wp-json\/wp\/v2\/media?parent=3746"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tomat-pomidor.com\/en\/wp-json\/wp\/v2\/categories?post=3746"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tomat-pomidor.com\/en\/wp-json\/wp\/v2\/tags?post=3746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}