{"id":5668,"date":"2026-01-13T15:02:04","date_gmt":"2026-01-13T15:02:04","guid":{"rendered":"https:\/\/gardenadvice.co.uk\/gardening-tips\/?p=5668"},"modified":"2026-01-13T15:02:48","modified_gmt":"2026-01-13T15:02:48","slug":"how-to-grow-melons-successfully-outdoors-in-a-glasshouse","status":"publish","type":"post","link":"https:\/\/gardenadvice.co.uk\/gardening-tips\/how-to-grow-melons-successfully-outdoors-in-a-glasshouse\/","title":{"rendered":"How to Grow Melons Successfully (Outdoors &amp; in a Glasshouse)"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"650\" height=\"867\" src=\"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-content\/uploads\/sites\/6\/2026\/01\/Growing-Melons.jpg\" alt=\"\" class=\"wp-image-5669\" srcset=\"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-content\/uploads\/sites\/6\/2026\/01\/Growing-Melons.jpg 650w, https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-content\/uploads\/sites\/6\/2026\/01\/Growing-Melons-225x300.jpg 225w, https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-content\/uploads\/sites\/6\/2026\/01\/Growing-Melons-520x694.jpg 520w, https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-content\/uploads\/sites\/6\/2026\/01\/Growing-Melons-320x427.jpg 320w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>Growing melons such as <strong>cantaloupe, honeydew, and watermelon<\/strong> is extremely rewarding. With the right warmth, sunshine, and soil, even UK gardeners can enjoy sweet, home-grown fruit. Melons are heat-loving plants, so careful timing and good growing conditions are essential.<\/p>\n\n\n\n<p>Below is a practical, step-by-step guide to growing melons successfully, including advice for <strong>glasshouse cultivation<\/strong>, which is often the most reliable option in cooler climates.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Best Conditions for Growing Melons<\/strong><\/h2>\n\n\n\n<p>Melons need warmth and light to thrive.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Sun:<\/strong> Full sun is essential \u2013 at least 6\u20138 hours per day<\/li>\n\n\n\n<li><strong>Temperature:<\/strong> Soil should be above 18\u00b0C (65\u00b0F) before planting<\/li>\n\n\n\n<li><strong>Shelter:<\/strong> A sheltered site improves growth and fruit set<\/li>\n\n\n\n<li><strong>Soil:<\/strong> Fertile, free-draining soil that retains moisture<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Sowing Melon Seeds<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>When to Sow<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Indoors:<\/strong> Start seeds 3\u20134 weeks before the last expected frost<\/li>\n\n\n\n<li><strong>Outdoors:<\/strong> Sow only once all frost risk has passed and the soil has warmed<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>How to Sow<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sow seeds 1\u20132 cm (\u00bd\u20131 inch) deep<\/li>\n\n\n\n<li>Plant seeds on their edge to reduce the risk of rotting<\/li>\n\n\n\n<li>Use pots or modules filled with good-quality compost<\/li>\n\n\n\n<li>Keep warm at 21\u201327\u00b0C (70\u201380\u00b0F) for reliable germination<\/li>\n<\/ul>\n\n\n\n<p>Transplant seedlings once they have 2\u20133 true leaves, hardening them off gradually before moving them outdoors or into a glasshouse.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Soil Preparation<\/strong><\/h2>\n\n\n\n<p>Melons are hungry plants and need rich soil.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dig in plenty of well-rotted manure or garden compost<\/li>\n\n\n\n<li>Raised beds or planting mounds improve drainage and soil warmth<\/li>\n\n\n\n<li>Ensure soil holds moisture but does not become waterlogged<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Watering &amp; Feeding<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Water deeply and regularly, especially during flowering and fruiting<\/li>\n\n\n\n<li>Avoid wetting leaves to reduce disease risk<\/li>\n\n\n\n<li>Feed weekly with a high-potash fertiliser once flowers appear<\/li>\n\n\n\n<li>Reduce watering slightly as fruits ripen to improve sweetness<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pollination &amp; Fruit Set<\/strong><\/h2>\n\n\n\n<p>Melons produce male and female flowers.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Female flowers have a small swelling behind them<\/li>\n\n\n\n<li>In cool weather or where insects are scarce, hand pollinate using a soft brush or by transferring pollen from a male flower<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Supporting &amp; Caring for Fruits<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Allow 3\u20135 fruits per plant for the best size and flavour<\/li>\n\n\n\n<li>Place straw, tiles, or wood beneath fruits to prevent rot<\/li>\n\n\n\n<li>Trailing varieties need space or support<\/li>\n\n\n\n<li>When grown vertically, support fruits with nets or fabric slings<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pruning Melon Plants<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pinch out the growing tip after 4\u20135 leaves<\/li>\n\n\n\n<li>This encourages side shoots, which produce more female flowers and fruit<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Harvesting Melons<\/strong><\/h2>\n\n\n\n<p>Ripe melons usually:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Smell sweet<\/li>\n\n\n\n<li>Feel slightly soft at the blossom end<\/li>\n\n\n\n<li>Detach easily from the vine<\/li>\n<\/ul>\n\n\n\n<p>Harvest gently to avoid bruising.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Common Problems<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Lots of leaves, no fruit:<\/strong> Too much nitrogen or insufficient sunlight<\/li>\n\n\n\n<li><strong>Powdery mildew:<\/strong> Improve airflow and remove affected leaves<\/li>\n\n\n\n<li><strong>Small fruits:<\/strong> Too many fruits per plant or irregular watering<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\"><strong>Growing Melons in a Glasshouse<\/strong><\/h1>\n\n\n\n<p>Growing melons in a glasshouse (greenhouse) is one of the most reliable ways to achieve good results in the UK. The extra warmth, shelter, and control dramatically improve growth and fruit quality.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Benefits of Glasshouse Growing<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Extends the growing season from early spring to late autumn<\/li>\n\n\n\n<li>Protects plants from wind, heavy rain, and cold nights<\/li>\n\n\n\n<li>Ideal for heat-loving crops such as melons, tomatoes, and cucumbers<\/li>\n\n\n\n<li>Allows better control of temperature, humidity, and pests<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Setting Up Your Glasshouse<\/strong><\/h2>\n\n\n\n<p>A stable base is essential. A 100mm concrete base with a timber frame, slightly sloped for drainage, works extremely well.<\/p>\n\n\n\n<p>Full guidance here:<br><a href=\"https:\/\/gardenadvice.co.uk\/gardening-tips\/glasshouse-base\/\">https:\/\/gardenadvice.co.uk\/gardening-tips\/glasshouse-base\/<\/a><\/p>\n\n\n\n<p>Position your glasshouse:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In full sun, ideally facing south or southeast<\/li>\n\n\n\n<li>In a sheltered location<\/li>\n\n\n\n<li>With easy access to water (and electricity if possible)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Temperature Control<\/strong><\/h2>\n\n\n\n<p>Glasshouses can overheat quickly, especially in summer.<\/p>\n\n\n\n<p>Cooling methods include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Roof vents and open doors<\/li>\n\n\n\n<li>Damping down paths to increase humidity<\/li>\n\n\n\n<li>Natural shading from vines or foliage<\/li>\n\n\n\n<li>External shade blinds<\/li>\n\n\n\n<li>Avoiding overcrowding to improve airflow<\/li>\n<\/ul>\n\n\n\n<p>More cooling tips:<br><a href=\"https:\/\/gardenadvice.co.uk\/gardening-tips\/how-to-keep-you-glasshouse-cool\/\">https:\/\/gardenadvice.co.uk\/gardening-tips\/how-to-keep-you-glasshouse-cool\/<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Watering &amp; Humidity in a Glasshouse<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Water early in the day<\/li>\n\n\n\n<li>Keep compost consistently moist, not waterlogged<\/li>\n\n\n\n<li>Damping down floors helps deter red spider mite<\/li>\n\n\n\n<li>Capillary matting or trays help maintain even moisture<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Feeding Glasshouse Melons<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Start feeding once flowering begins<\/li>\n\n\n\n<li>Use high-potash feeds<\/li>\n\n\n\n<li>Avoid excess nitrogen, which causes leafy growth but poor fruiting<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pollination Indoors<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open doors and vents on warm days<\/li>\n\n\n\n<li>Gently shake flowering plants<\/li>\n\n\n\n<li>Hand-pollinate if necessary<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Hygiene &amp; Pest Control<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Clean glass annually to maximise light<\/li>\n\n\n\n<li>Remove dead or diseased leaves promptly<\/li>\n\n\n\n<li>Watch for aphids, whitefly, and red spider mite<\/li>\n\n\n\n<li>Good airflow helps prevent fungal diseases<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>Melons reward patience and attention. Whether grown outdoors in a warm summer or under glass for more reliable results, good soil, consistent watering, and plenty of sunshine are the keys to a successful harvest.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Growing melons such as cantaloupe, honeydew, and watermelon is extremely rewarding. With the right warmth, sunshine, and soil, even UK gardeners can enjoy sweet, home-grown fruit. Melons are heat-loving plants, so careful timing and&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":5669,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[49],"tags":[],"class_list":["post-5668","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fruit-garden"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Grow Melons Successfully (Outdoors &amp; in a Glasshouse) - GardenAdvice AI Gardening Database<\/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:\/\/gardenadvice.co.uk\/gardening-tips\/how-to-grow-melons-successfully-outdoors-in-a-glasshouse\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Grow Melons Successfully (Outdoors &amp; in a Glasshouse) - GardenAdvice AI Gardening Database\" \/>\n<meta property=\"og:description\" content=\"Growing melons such as cantaloupe, honeydew, and watermelon is extremely rewarding. 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Melons are heat-loving plants, so careful timing and&#046;&#046;&#046;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gardenadvice.co.uk\/gardening-tips\/how-to-grow-melons-successfully-outdoors-in-a-glasshouse\/\" \/>\n<meta property=\"og:site_name\" content=\"GardenAdvice AI Gardening Database\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/GardenAdvice.co.uk\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-13T15:02:04+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-13T15:02:48+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/gardenadvice.co.uk\/gardening-tips\/wp-content\/uploads\/sites\/6\/2026\/01\/Growing-Melons.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"650\" \/>\n\t<meta property=\"og:image:height\" content=\"867\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"GardenAdvice\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@mygardenteam\" \/>\n<meta name=\"twitter:site\" content=\"@mygardenteam\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"GardenAdvice\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/gardenadvice.co.uk\/gardening-tips\/how-to-grow-melons-successfully-outdoors-in-a-glasshouse\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/gardenadvice.co.uk\/gardening-tips\/how-to-grow-melons-successfully-outdoors-in-a-glasshouse\/\"},\"author\":{\"name\":\"GardenAdvice\",\"@id\":\"https:\/\/gardenadvice.co.uk\/gardening-tips\/#\/schema\/person\/6788fc62d3d3094c8008a4c6e4531dbe\"},\"headline\":\"How to Grow Melons Successfully (Outdoors &amp; 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