{"id":2800,"date":"2026-10-27T13:34:42","date_gmt":"2026-10-27T13:34:42","guid":{"rendered":"https:\/\/confluencemediagroup.net\/blog\/?p=2800"},"modified":"2026-10-27T13:34:42","modified_gmt":"2026-10-27T13:34:42","slug":"how-to-grow-leeks-in-containers","status":"publish","type":"post","link":"https:\/\/confluencemediagroup.net\/blog\/how-to-grow-leeks-in-containers\/","title":{"rendered":"How to Grow Leeks in Containers (Even on a Small Balcony)"},"content":{"rendered":"<p>The first leek I ever tried on my balcony came up as a green blade the width of a pencil and stayed that way all summer. I pulled it in September feeling a little foolish. It tasted fine, but it was a leek the way a toothpick is a tree.<\/p>\n<p>Here&#8217;s the thing about leeks: they&#8217;re not hard. They&#8217;re slow, and they&#8217;re deep, and both of those are easy to plan for once you know. If you have a balcony, a patio, or even a deep windowsill box, you can grow leeks that look like they came from the market. Here&#8217;s how I do it now.<\/p>\n<aside class=\"cmg-supplies\"><p class=\"cmg-supplies__title\">What you&#039;ll need<\/p><div class=\"cmg-supplies__body\"><\/p>\n<ul>\n<li><a href=\"https:\/\/www.amazon.com\/dp\/B0046VHU1G?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">Seed-starting mix<\/a> \u2014 fine and light, so tiny leek seedlings can push through<\/li>\n<li><a href=\"https:\/\/www.amazon.com\/dp\/B085CDPSMR?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">A clip-on grow light<\/a> \u2014 for starting seeds in the dark of late winter; leeks are slow, and a light keeps them from getting leggy<\/li>\n<li><a href=\"https:\/\/www.amazon.com\/dp\/B076FLM4T2?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">Fabric grow bags<\/a> \u2014 the tall ones, at least 10 inches deep, give leeks the depth they want and drain well<\/li>\n<li><a href=\"https:\/\/www.amazon.com\/dp\/B002Y04TK6?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">Organic potting mix<\/a> \u2014 for the final container, since seed-starting mix is too fine to hold a mature plant<\/li>\n<li><a href=\"https:\/\/www.amazon.com\/dp\/B001H1LS6G?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">Espoma Garden-Tone<\/a> \u2014 a gentle granular feed for a long-season crop<\/li>\n<li><a href=\"https:\/\/www.amazon.com\/dp\/B095H2ZJSB?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">A long-spout watering can<\/a> \u2014 for slow, steady water right at the soil<\/li>\n<\/ul>\n<p><\/div><\/aside>\n<h2>Why leeks suit a small space<\/h2>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/confluencemediagroup.net\/blog\/wp-content\/uploads\/2026\/10\/how-to-grow-leeks-in-containers-02-why.jpg\" alt=\"Seven leeks growing straight up in one deep pot on a small balcony\" \/><\/figure>\n<p>Leeks grow straight up. A leek takes up barely more room than a scallion, and a single 12-inch pot can hold six to eight plants. They&#8217;re also cold-hardy, which means they&#8217;re a real fall and winter crop in the Portland area, where my balcony sits. When everything else in my pots has gone brown, the leeks are still standing there, green and stubborn.<\/p>\n<p>The trade-off is time. Most leeks need 100 to 120 days from transplant, and a variety like &#8216;American Flag&#8217; or &#8216;King Richard&#8217; wants a long season to get thick. If you&#8217;d like to start them from seed, that means starting early. Here&#8217;s the timeline I follow.<\/p>\n<h2>When to sow<\/h2>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/confluencemediagroup.net\/blog\/wp-content\/uploads\/2026\/10\/how-to-grow-leeks-in-containers-03-sow.jpg\" alt=\"Thin leek seedlings in a seed tray under a clip-on grow light\" \/><\/figure>\n<p>Start seeds indoors about 10 to 12 weeks before your last spring frost. In my part of the Pacific Northwest, that&#8217;s late January or early February. If you live somewhere colder, count back from your own date. You can also buy leek starts at a nursery in spring and skip the seed-starting step, which is a perfectly good shortcut. I won&#8217;t judge.<\/p>\n<p>Fill a shallow tray or a few cell packs with <a href=\"https:\/\/www.amazon.com\/dp\/B0046VHU1G?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">seed-starting mix<\/a>, sprinkle the seeds about a quarter inch apart, and cover them with a thin layer of mix. Keep it moist, not soggy. Leek seeds are slow to wake up, so expect one to two weeks before you see a green loop push through.<\/p>\n<p>If your windowsill is dim in winter, a <a href=\"https:\/\/www.amazon.com\/dp\/B085CDPSMR?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">clip-on grow light<\/a> set a few inches above the seedlings for 12 to 14 hours a day keeps them from stretching. I wrote more about setting up seeds on a sill in <a href=\"https:\/\/confluencemediagroup.net\/blog\/how-to-start-seeds-indoors-windowsill\">how to start seeds indoors on a windowsill<\/a>, and the same rules apply here.<\/p>\n<p>When the seedlings are about 6 inches tall, give them a trim. I snip the tops back to around 3 inches with scissors. It sounds drastic, but it helps them grow thick, strong stems rather than floppy ones.<\/p>\n<h2>The container: depth matters most<\/h2>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/confluencemediagroup.net\/blog\/wp-content\/uploads\/2026\/10\/how-to-grow-leeks-in-containers-04-container.jpg\" alt=\"A deep fabric grow bag and a drilled bucket beside a shallow pot for contrast\" \/><\/figure>\n<p>This is where my first leek went wrong. Leeks want depth. The long white part you eat is the blanched stem, and it grows in the soil. A shallow pot makes a short, skinny leek.<\/p>\n<p>Choose a container at least <strong>10 to 12 inches deep<\/strong>. A tall <a href=\"https:\/\/www.amazon.com\/dp\/B076FLM4T2?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">fabric grow bag<\/a> works well, and so does a 5-gallon bucket with drainage holes drilled in the bottom. In a 5-gallon container, I plant about six leeks. I talked about why I like bags for deep-rooted crops in <a href=\"https:\/\/confluencemediagroup.net\/blog\/fabric-grow-bags-vs-plastic-pots\">fabric grow bags vs. plastic pots<\/a>.<\/p>\n<p>Fill the container with <a href=\"https:\/\/www.amazon.com\/dp\/B002Y04TK6?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">potting mix<\/a>, not garden soil, and leave an inch or two of space at the top.<\/p>\n<h2>Transplanting: the dibble trick<\/h2>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/confluencemediagroup.net\/blog\/wp-content\/uploads\/2026\/10\/how-to-grow-leeks-in-containers-05-dibble.jpg\" alt=\"Leek seedlings dropped deep into dibbled holes with a wooden dowel\" \/><\/figure>\n<p>When the seedlings are the thickness of a pencil and nights are above freezing, usually April, they&#8217;re ready to move out. Harden them off for a week first, an hour or two outside on the first day and a little longer each day after.<\/p>\n<p>Then plant them deep. Poke a hole about 6 inches down with a pencil or a dowel. Drop in a seedling so just the top inch or two of green sticks out, and let the hole fill loosely with water instead of packing soil around it. Space the holes 2 to 3 inches apart. It feels like you&#8217;re burying them, and you are, on purpose. That buried stem is the white shaft you&#8217;ll harvest.<\/p>\n<h2>Water, feed, and hill<\/h2>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/confluencemediagroup.net\/blog\/wp-content\/uploads\/2026\/10\/how-to-grow-leeks-in-containers-06-feed.jpg\" alt=\"Leeks hilled and fed in a grow bag beside a long-spout watering can\" \/><\/figure>\n<p>Leeks like steady moisture. A container dries out faster than the ground, so check with your finger an inch down. If it&#8217;s dry, water slowly with a <a href=\"https:\/\/www.amazon.com\/dp\/B095H2ZJSB?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">long-spout can<\/a> until water runs out the bottom. A soil moisture meter helps, and I talked about whether you need one in <a href=\"https:\/\/confluencemediagroup.net\/blog\/do-you-need-a-soil-moisture-meter\">do you need a soil moisture meter<\/a>.<\/p>\n<p>Leeks also have a long season to fill, so feed them. About every four to six weeks, sprinkle a spoonful of <a href=\"https:\/\/www.amazon.com\/dp\/B001H1LS6G?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\">Garden-Tone<\/a> around the base and scratch it in, then water. I cover the basics in <a href=\"https:\/\/confluencemediagroup.net\/blog\/how-to-fertilize-container-vegetables\">how to fertilize container vegetables<\/a>.<\/p>\n<p>As the leeks grow, the planting hole will fill in. Once it has, start &#8220;hilling&#8221;: add a little potting mix around the base of each plant each month, covering the stem but not the green fan of leaves. More buried stem means more white shaft.<\/p>\n<h2>When to harvest<\/h2>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/confluencemediagroup.net\/blog\/wp-content\/uploads\/2026\/10\/how-to-grow-leeks-in-containers-07-harvest.jpg\" alt=\"Freshly pulled leeks with long white shanks, one split lengthwise\" \/><\/figure>\n<p>You can start pulling leeks when they&#8217;re about an inch across, usually late summer or fall. I pull what I need and leave the rest. Slide a trowel alongside the leek, loosen the soil, and ease it out. Wash it well, because soil hides between the layers. Slice it lengthwise and rinse under cold water.<\/p>\n<p>Leeks hold in the pot through light frost and keep getting a little sweeter in the cold. In the Portland area I harvest well into December. If you&#8217;re somewhere with a hard freeze, cover the pot with a frost cloth or move it close to the house wall.<\/p>\n<h2>What I got wrong<\/h2>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/confluencemediagroup.net\/blog\/wp-content\/uploads\/2026\/10\/how-to-grow-leeks-in-containers-08-wrong.jpg\" alt=\"A skinny, stubby leek from a shallow pot beside a full-size container leek\" \/><\/figure>\n<p>I used to skip the trim, and my seedlings flopped. I used to plant too shallow, and my leeks came out stubby. And I used to forget to feed them, so they stalled around pencil width. It&#8217;s all fixable, and it&#8217;s the reason leeks are a patience crop, not a difficult one.<\/p>\n<p>If you&#8217;d like a bigger map of what to grow in pots and when, I go through it in my book, <a href=\"https:\/\/www.amazon.com\/dp\/B0H3V14FWM?tag=almanachouse-20\" target=\"_blank\" rel=\"noopener\"><em>Small-Space Big Harvest<\/em><\/a>. It&#8217;s the one I wish I&#8217;d had on my first balcony.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Grow leeks in containers on a balcony: when to sow, how deep the pot needs to be, how to plant and hill them, and when to harvest. Easy steps for beginners.<\/p>\n","protected":false},"author":1,"featured_media":2830,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[4],"class_list":["post-2800","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gardening","tag-affiliate"],"_links":{"self":[{"href":"https:\/\/confluencemediagroup.net\/blog\/wp-json\/wp\/v2\/posts\/2800","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/confluencemediagroup.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/confluencemediagroup.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/confluencemediagroup.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/confluencemediagroup.net\/blog\/wp-json\/wp\/v2\/comments?post=2800"}],"version-history":[{"count":1,"href":"https:\/\/confluencemediagroup.net\/blog\/wp-json\/wp\/v2\/posts\/2800\/revisions"}],"predecessor-version":[{"id":2838,"href":"https:\/\/confluencemediagroup.net\/blog\/wp-json\/wp\/v2\/posts\/2800\/revisions\/2838"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/confluencemediagroup.net\/blog\/wp-json\/wp\/v2\/media\/2830"}],"wp:attachment":[{"href":"https:\/\/confluencemediagroup.net\/blog\/wp-json\/wp\/v2\/media?parent=2800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/confluencemediagroup.net\/blog\/wp-json\/wp\/v2\/categories?post=2800"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/confluencemediagroup.net\/blog\/wp-json\/wp\/v2\/tags?post=2800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}