{"id":1991,"date":"2026-11-07T07:00:00","date_gmt":"2026-11-07T06:00:00","guid":{"rendered":"http:\/\/192.168.60.121\/?p=1991"},"modified":"2026-11-10T12:11:40","modified_gmt":"2026-11-10T11:11:40","slug":"growing-spinach-in-pots","status":"publish","type":"post","link":"https:\/\/ortoinbalcone.com\/en\/growing-spinach-in-pots\/","title":{"rendered":"Spinach in Pots: Sowing, Growth and Continuous Harvests"},"content":{"rendered":"<p>Spinach is the &#8220;emergency&#8221; vegetable of the balcony garden: <strong>from seed to first cut in 35\u201345 days<\/strong>, it tolerates cold, and with autumn sowing it accompanies you until March.<\/p>\n<p>It is not a difficult crop, but it has two known quirks: <strong>slow germination in the cold<\/strong> and <strong>bolting in the heat<\/strong>. Both are solved with two moves. This guide covers sowing, pot, watering and harvest in an honest format: what really works in pots and what does not.<\/p>\n<p>The full autumn calendar is in <a href=\"\/en\/what-to-sow-in-october\/\">What to Sow in October<\/a>.<\/p>\n<h2>Why spinach in pots works<\/h2>\n<ul>\n<li><strong>Short cycle<\/strong>: 35\u201345 days from seed to cut, even in autumn.<\/li>\n<li><strong>Cold-tolerant<\/strong>: as a formed plant it holds \u22123 \u00b0C under shelter, and after the frost the leaves stay good (in fact, they sweeten).<\/li>\n<li><strong>Continuous harvest<\/strong>: you cut and it comes back \u2014 one tray sowing lasts 2\u20133 months of spinach.<\/li>\n<li><strong>Little space<\/strong>: the taproot is modest (15\u201320 cm), even a 20 cm tray is fine.<\/li>\n<\/ul>\n<p>The only real limit in pots: <strong>summer heat<\/strong>. Above 25\u201327 \u00b0C bolting (the rush to flower) is a matter of days. That is why the useful sowings are two: <strong>spring (March\u2013May)<\/strong> and <strong>autumn (August\u2013November)<\/strong>.<\/p>\n<h2>Varieties to choose<\/h2>\n<p>Look on the packet for two characteristics: <strong>early<\/strong> and <strong>slow to bolt<\/strong>.<\/p>\n<ul>\n<li><strong>Matador<\/strong>: the most widespread, fast, big and crinkled leaves, good even in moderate heat. The organic 1,000-seed version is one of the best sellers on Amazon: <a href=\"https:\/\/www.amazon.it\/dp\/B09W2ZXNKD?tag=ortoinbalcone09-21\" rel=\"sponsored nofollow noopener\" target=\"_blank\">organic Matador spinach seeds<\/a>.<\/li>\n<li><strong>Viroflay<\/strong>: similar to Matador, slightly more resistant to heat.<\/li>\n<li><strong>New Zealand spinach<\/strong> (Tetragonia): attention, <strong>it is not Spinacia oleracea<\/strong> \u2014 it is a hardy perennial grown like lettuce. Pretty, but it is another plant: you find it as its own profile in <a href=\"\/en\/piante\/oib-plant-030-new-zealand-spinach\/\">New Zealand spinach<\/a>.<\/li>\n<\/ul>\n<p>For autumn sowings, always choose a packet that explicitly indicates sowing from August to November.<\/p>\n<h2>When to sow<\/h2>\n<table>\n<thead>\n<tr>\n<th>Period<\/th>\n<th>Harvest<\/th>\n<th>Notes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>March\u2013May<\/td>\n<td>May\u2013July<\/td>\n<td>Classic: rising temperatures, fast germination<\/td>\n<\/tr>\n<tr>\n<td>August\u2013September<\/td>\n<td>October\u2013December<\/td>\n<td>The best: fresh, regular cycle<\/td>\n<\/tr>\n<tr>\n<td>October\u2013early November<\/td>\n<td>January\u2013March<\/td>\n<td>Works while the day has light; below 10 \u00b0C by day it slows down<\/td>\n<\/tr>\n<tr>\n<td>Summer (June\u2013July)<\/td>\n<td>\u2014<\/td>\n<td><strong>No<\/strong>: bolting in 2 weeks<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>The germination trick: soaking<\/h2>\n<p>The spinach seed has a thick coat and <strong>germinates badly in the cold<\/strong>. The trick from the serious garden:<\/p>\n<ol>\n<li><strong>Soak 12\u201324 hours<\/strong> in water at room temperature.<\/li>\n<li>Drain, dry on the surface, sow immediately.<\/li>\n<\/ol>\n<p>Soaking softens the hard seed coat of spinach and speeds up and evens out germination. It is not a ritual: the imbibed seed breaks its coat sooner and starts.<\/p>\n<h2>Sowing and thinning of spinach in pots<\/h2>\n<ol>\n<li>Moist substrate (not sodden), in a tray or pot of at least 15\u201320 cm depth.<\/li>\n<li><strong>2\u20133 seeds every 8\u201310 cm<\/strong>, at 1\u20131.5 cm depth.<\/li>\n<li>When they have 2\u20133 true leaves, <strong>thin to 15 cm<\/strong>: spinach is one of the few garden vegetables that you thin <em>to eat<\/em> the thinnings.<\/li>\n<li>In a 50 cm tray: 4 well-spaced plants, or 8 closer with leaf harvest.<\/li>\n<\/ol>\n<h2>Pot and substrate for spinach in pots<\/h2>\n<ul>\n<li><strong>Volume<\/strong>: for 4\u20136 plants, 10\u201315 L is enough; for a &#8220;garden-style&#8221; sowing (12+ plants), 25\u201330 L.<\/li>\n<li><strong>Depth<\/strong>: 15\u201320 cm are enough for the taproot, but more substrate = more autonomy in winter.<\/li>\n<li><strong>Composition<\/strong>: 60% potting mix, 30% expanded clay, 10% perlite. Spinach loves a fresh but well-drained substrate: crown rot is its enemy in pots.<\/li>\n<\/ul>\n<p><figure><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/10\/06-inline.webp\" alt=\"Close-up of hands thinning newly born spinach seedlings in a pot\" loading=\"lazy\" \/><\/figure>\n<\/p>\n<h2>Watering spinach in pots: the weak point<\/h2>\n<p>Spinach <strong>warns you with the leaves<\/strong>: if you see them &#8220;wilting&#8221; at midday, you are already late.<\/p>\n<ul>\n<li><strong>Autumn\u2013winter<\/strong>: 2\u20133 times a week, at midday.<\/li>\n<li><strong>Spring<\/strong>: every 1\u20132 days, and on sunny days even twice.<\/li>\n<li><strong>Never on the ground<\/strong> (on the leaves) in autumn: humidity + cold = spinach downy mildew.<\/li>\n<\/ul>\n<p>The full routine with the finger check is in <a href=\"\/en\/watering-in-containers\/\">Watering in containers<\/a>.<\/p>\n<h2>Feeding spinach in pots: nitrogen, but little<\/h2>\n<p>Spinach is a leafy: it wants <strong>nitrogen<\/strong>, but in pots less than in the ground.<\/p>\n<ul>\n<li>One dose of slow-release fertiliser at planting (see <a href=\"\/en\/feeding-plants-in-pots\/\">Feeding plants in pots<\/a>).<\/li>\n<li>In autumn: that is enough. In spring: a second dose at mid-cycle.<\/li>\n<li><strong>Deficiency signal<\/strong>: low leaves yellowing \u2192 nitrogen. In that case a liquid dose diluted to half strength, not full.<\/li>\n<\/ul>\n<h2>Frost and protection for spinach in pots<\/h2>\n<ul>\n<li>Formed plant: <strong>\u22123 \u00b0C<\/strong> outdoors, without damage.<\/li>\n<li>Young plant (2\u20133 weeks): the frost kills it.<\/li>\n<li>With <a href=\"https:\/\/www.amazon.it\/dp\/B0HBLG1YBW?tag=ortoinbalcone09-21\" rel=\"sponsored nofollow noopener\" target=\"_blank\">non-woven fleece<\/a> on nights below 0 \u00b0C, the harvest window extends by 4\u20136 weeks.<\/li>\n<\/ul>\n<p>The logic of the fleece (when to open, when to close) is in <a href=\"\/en\/protection-from-weather\/\">Protection from weather<\/a>.<\/p>\n<h2>Harvest of spinach in pots: cut and it comes back<\/h2>\n<ul>\n<li><strong>First cut at 15\u201320 cm<\/strong> from the crown: cut with secateurs <strong>2 cm above<\/strong> the crown, not flush \u2014 the growth heart must stay.<\/li>\n<li>It produces again in 3\u20134 weeks.<\/li>\n<li><strong>When the flower shoots appear (bolting)<\/strong>: the plant is at the end of its life. Cut everything, the heart is still edible, and sow the next one.<\/li>\n<li>Leaves after the frost: <strong>wash them cold and eat them<\/strong> \u2014 the sugar has concentrated, they are the best of the year.<\/li>\n<\/ul>\n<h2>Mistakes to avoid<\/h2>\n<ul>\n<li><strong>Sowing in June<\/strong>: bolting in 2 weeks.<\/li>\n<li><strong>Sowing at 3 cm<\/strong>: in autumn it never germinates.<\/li>\n<li><strong>Forgetting the soaking in October<\/strong>: germination at 50% and crooked plants.<\/li>\n<li><strong>Watering in the evening in autumn<\/strong>: downy mildew on the crown.<\/li>\n<\/ul>\n<h2>Sources<\/h2>\n<ul>\n<li>CREA \u2014 Spinach (Spinacia oleracea): varieties, sowing and harvest (technical sheets)<\/li>\n<li>Orto da Coltivare \u2014 Spinach: growing guide, soaking and thinning<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Spinach is the &#8220;emergency&#8221; vegetable of the balcony garden: from seed to first cut in 35\u201345 days, it tolerates cold, and with autumn sowing it accompanies you until March. It is not a difficult crop, but it has two known quirks: slow germination in the cold and bolting in the heat. Both are solved with [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1752,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_locale":"en_GB","_original_post":"https:\/\/ortoinbalcone.com\/?p=1854","oib_translation_group_id":"","oib_affiliate_link_limit":0,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-1991","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guide","en-GB"],"_links":{"self":[{"href":"https:\/\/ortoinbalcone.com\/wp-json\/wp\/v2\/posts\/1991","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ortoinbalcone.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ortoinbalcone.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ortoinbalcone.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ortoinbalcone.com\/wp-json\/wp\/v2\/comments?post=1991"}],"version-history":[{"count":3,"href":"https:\/\/ortoinbalcone.com\/wp-json\/wp\/v2\/posts\/1991\/revisions"}],"predecessor-version":[{"id":3626,"href":"https:\/\/ortoinbalcone.com\/wp-json\/wp\/v2\/posts\/1991\/revisions\/3626"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ortoinbalcone.com\/wp-json\/wp\/v2\/media\/1752"}],"wp:attachment":[{"href":"https:\/\/ortoinbalcone.com\/wp-json\/wp\/v2\/media?parent=1991"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ortoinbalcone.com\/wp-json\/wp\/v2\/categories?post=1991"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ortoinbalcone.com\/wp-json\/wp\/v2\/tags?post=1991"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}