{"id":374,"date":"2025-09-14T13:58:29","date_gmt":"2025-09-14T13:58:29","guid":{"rendered":"https:\/\/www.andrewgardener.co.uk\/?p=374"},"modified":"2025-10-11T11:53:55","modified_gmt":"2025-10-11T11:53:55","slug":"september-gardening-guide","status":"publish","type":"post","link":"https:\/\/www.andrewgardener.co.uk\/index.php\/2025\/09\/14\/september-gardening-guide\/","title":{"rendered":"September Garden & Greenhouse Checklist"},"content":{"rendered":"\t\t
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September Garden & Greenhouse Checklist<\/h2>\n

A practical guide to what to sow, plant, prune, and prepare this month<\/em><\/p>\n

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\"\ud83c\udf38\" Flowers & Borders<\/h3>\n
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    Sow hardy annuals<\/strong> like cornflowers, cerinthe, ammi, and scabiosa for early summer blooms.<\/p>\n<\/li>\n

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    Lift gladioli corms<\/strong>, dry them, and store frost-free.<\/p>\n<\/li>\n

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    Plant spring bedding<\/strong>: wallflowers, pansies, forget-me-nots.<\/p>\n<\/li>\n

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    Collect seeds<\/strong> from favourite flowers and store for spring sowing.<\/p>\n<\/li>\n

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    Fill pots for autumn colour<\/strong> with cyclamen, heathers, heucheras, and other seasonal bedding.<\/p>\n<\/li>\n

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    Divide and replant perennials<\/strong> like achillea once flowering finishes.<\/p>\n<\/li>\n

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    Control vine weevils<\/strong> if you spot notched leaves on potted plants.<\/p>\n<\/li>\n

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    Add late-flowering perennials<\/strong> like sedums to support pollinators.<\/p>\n<\/li>\n

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    Plant spring bulbs<\/strong>: crocus, daffodils, hyacinths, bluebells, fritillaries.<\/p>\n<\/li>\n

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    Take cuttings<\/strong> from fuchsias, salvias, pelargoniums.<\/p>\n<\/li>\n

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    Keep summer bedding going<\/strong> with regular deadheading and feeding.<\/p>\n<\/li>\n

  • \n

    Trim conifer hedges<\/strong> to tidy and manage height.<\/p>\n<\/li>\n

  • \n

    Leave sunflower heads<\/strong> for birds to feed on.<\/p>\n<\/li>\n

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    Make an autumn wreath<\/strong> with garden foliage and berries.<\/p>\n<\/li>\n

  • \n

    Visit other gardens<\/strong> for late-season inspiration.<\/p>\n<\/li>\n<\/ul>\n

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    \"\ud83c\udf4f\" Fruit & Veg<\/h3>\n
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      Sow hardy greens<\/strong>: kale, pak choi, mustard, mizuna, land cress, lamb\u2019s lettuce.<\/p>\n<\/li>\n

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      Prune summer raspberries<\/strong>: remove fruited canes, tie in new growth.<\/p>\n<\/li>\n

    • \n

      Pot up herbs<\/strong> like parsley and chives for indoor use.<\/p>\n<\/li>\n

    • \n

      Sow broad beans and peas<\/strong> for early crops next year.<\/p>\n<\/li>\n

    • \n

      Plant onion and shallot sets<\/strong> with tips just above soil.<\/p>\n<\/li>\n

    • \n

      Expose pumpkins and squash<\/strong> to sun by removing shading leaves.<\/p>\n<\/li>\n

    • \n

      Plant saffron crocus bulbs<\/strong> for an autumn harvest.<\/p>\n<\/li>\n

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      Pick apples and pears<\/strong> before wind damage; store undamaged fruit.<\/p>\n<\/li>\n

    • \n

      Dry chillies<\/strong> by threading and hanging in a warm, dry spot.<\/p>\n<\/li>\n

    • \n

      Ripen green tomatoes indoors<\/strong> before cold weather hits.<\/p>\n<\/li>\n

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      Lift and store potatoes<\/strong> in cool, dark, ventilated sacks.<\/p>\n<\/li>\n

    • \n

      Finish summer pruning<\/strong> of apple and pear trees.<\/p>\n<\/li>\n<\/ul>\n

      \u00a0<\/div>\n

      \"\ud83d\udee0\ufe0f\" Garden Maintenance<\/h3>\n
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      • \n

        Rake and spike lawns<\/strong>, re-seed bare patches.<\/p>\n<\/li>\n

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        Net ponds<\/strong> to catch falling leaves and reduce rot.<\/p>\n<\/li>\n

      • \n

        Water autumn asters<\/strong> to prevent mildew.<\/p>\n<\/li>\n

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        Clean water butts<\/strong> and check fittings before heavy rain.<\/p>\n<\/li>\n

      • \n

        Clear pondweed and algae<\/strong> from water features.<\/p>\n<\/li>\n

      • \n

        Secure tree ties and supports<\/strong> ahead of autumn winds.<\/p>\n<\/li>\n

      • \n

        Disinfect bird feeders and tables<\/strong> to prevent disease.<\/p>\n<\/li>\n

      • \n

        Collect fallen leaves<\/strong> to make leaf mould.<\/p>\n<\/li>\n

      • \n

        Check rosemary and lavender<\/strong> for beetles and larvae.<\/p>\n<\/li>\n

      • \n

        Remove rotting fruit<\/strong> to prevent fungal spread.<\/p>\n<\/li>\n

      • \n

        Order bare-root fruit trees<\/strong> for winter planting.<\/p>\n<\/li>\n

      • \n

        Inspect roses<\/strong> for blackspot and remove affected leaves.<\/p>\n<\/li>\n<\/ul>\n

        \u00a0<\/div>\n

        \"\ud83c\udf3f\" Greenhouse Tasks<\/h3>\n
          \n
        • \n

          Plant hyacinths<\/strong> in pots or glasses for Christmas blooms.<\/p>\n<\/li>\n

        • \n

          Remove shading<\/strong> by end of month to boost light.<\/p>\n<\/li>\n

        • \n

          Watch for pests and diseases<\/strong>, treat promptly.<\/p>\n<\/li>\n

        • \n

          Plant dwarf bulbs<\/strong>: irises, crocus, scilla, chionodoxa.<\/p>\n<\/li>\n

        • \n

          Pot up tender perennials<\/strong> like fuchsias and osteospermum before frost.<\/p>\n<\/li>\n

        • \n

          Plant Anemone De Caen<\/strong> for spring colour indoors.<\/p>\n<\/li>\n

        • \n

          Ventilate carefully<\/strong>, closing vents on cool nights.<\/p>\n<\/li>\n

        • \n

          Check heaters<\/strong> and plan for winter warmth.<\/p>\n<\/li>\n

        • \n

          Keep greenhouse tidy<\/strong>, removing dead leaves and blooms.<\/p>\n<\/li>\n

        • \n

          Prepare for early frosts<\/strong>, move tender plants inside.<\/p>\n<\/li>\n

        • \n

          Relocate peaches and nectarines<\/strong> to sheltered spots.<\/p>\n<\/li>\n<\/ul>\n

          \u00a0<\/p>\n

          References<\/h2>\n

          BBC Gardeners World Magazine. (2024).\u00a0What to do now – September. [online] Available at: https:\/\/www.gardenersworld.com\/what-to-do-now-september\/ [Accessed 21 Sep. 2025].<\/em><\/p>\n

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          September Garden & Greenhouse Checklist A practical guide to what to sow, plant, prune, and prepare this month   Flowers & Borders Sow hardy annuals like cornflowers, cerinthe, ammi, and scabiosa for early summer blooms. Lift gladioli corms, dry them, and store frost-free. Plant spring bedding: wallflowers, pansies, forget-me-nots. Collect seeds from favourite flowers and […]<\/p>\n","protected":false},"author":1,"featured_media":676,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[56],"tags":[59,67,63,64,58,61,68,65,66,62,57,60],"class_list":["post-374","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-garden-tasks","tag-autumn-preparation","tag-crystal-palace","tag-fruit-harvesting","tag-garden-maintenance","tag-greenhouse-tasks","tag-hardy-annuals","tag-london","tag-pest-control","tag-pollinator-plants","tag-pruning","tag-september-gardening-checklist","tag-spring-bulbs"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t