{"id":239,"date":"2016-06-25T15:39:09","date_gmt":"2016-06-25T14:39:09","guid":{"rendered":"http:\/\/gardenadvice.co.uk\/advisor\/gardening-tips\/?p=239"},"modified":"2025-11-18T20:08:10","modified_gmt":"2025-11-18T20:08:10","slug":"how-to-deal-with-thinning-conifer-hedges","status":"publish","type":"post","link":"https:\/\/gardenadvice.co.uk\/gardening-tips\/how-to-deal-with-thinning-conifer-hedges\/","title":{"rendered":"How To Deal With Thinning Conifer Hedges."},"content":{"rendered":"
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\"\"<\/figure>\n<\/div>\n\n\n

Leylandii Hedge <\/p>\n\n\n\n

Managing and Reviving Thinning Conifer Hedges<\/h2>\n\n\n\n

As the UK climate continues to warm and weather patterns become more erratic, conifer hedges\u2014particularly Leylandii and other fast-growing species\u2014are becoming increasingly vulnerable to stress, fungal infections, and general die-back. Combined with the fact that many conifer species have a natural lifespan of around 30 years<\/strong>, it\u2019s common to see mature hedges starting to thin out, especially at the base. While correct pruning, watering, and feeding can extend a hedge\u2019s life, many established conifers will still decline naturally with age.<\/p>\n\n\n\n

Why Conifer Hedges Thin Out<\/strong><\/h2>\n\n\n\n

Several factors contribute to thinning, especially lower down:<\/p>\n\n\n\n

    \n
  • Reduced light penetration<\/strong> as the hedge matures<\/li>\n\n\n\n
  • Root congestion<\/strong>, limiting the plant\u2019s ability to take up nutrients<\/li>\n\n\n\n
  • Climate stress<\/strong>, including drought, warmer winters, and heavy rainfall<\/li>\n\n\n\n
  • Fungal infections<\/strong>, such as Pestalotiopsis<\/em> and Phytophthora<\/em><\/li>\n\n\n\n
  • Incorrect pruning<\/strong>, particularly cutting back into old wood which cannot regenerate<\/li>\n<\/ul>\n\n\n\n

    Because most conifers cannot reshoot from old brown wood, thinning tends to worsen unless managed proactively.<\/p>\n\n\n\n

    \n\n\n\n

    Planting at the Base to Restore Density<\/strong><\/h2>\n\n\n\n

    For hedges that have become open at the bottom but are otherwise healthy, we often recommend underplanting<\/strong> with shade-tolerant, easily clipped species that will fill the gaps and restore a dense, green appearance.<\/p>\n\n\n\n

    Best Plants for Filling the Base<\/strong><\/h3>\n\n\n\n
      \n
    • Lonicera nitida (Shrubby Honeysuckle)<\/strong>
      A tough, reliable shrub that tolerates shade, clipping, and poor soil. It knits together quickly and forms a dense, evergreen layer beneath conifers.<\/li>\n\n\n\n
    • Taxus baccata (Yew)<\/strong>
      A slow-growing but highly adaptable evergreen that copes well with dry shade beneath established conifers. Yew responds well to pruning, allowing you to mould it into the hedge line over time.<\/li>\n<\/ul>\n\n\n\n

      Both options grow happily underneath conifers and provide long-term structure while allowing the original hedge to remain in place.<\/p>\n\n\n\n

      \n\n\n\n

      Replacing Bare Sections Using Bamboo<\/strong><\/h2>\n\n\n\n

      Where conifers are thinning more extensively\u2014or where whole sections have died back\u2014replacement planting may be the most practical option. One of the most effective strategies we use is integrating bamboo<\/strong> into the gaps.<\/p>\n\n\n\n

      Why Bamboo Works<\/strong><\/h3>\n\n\n\n
        \n
      • Grows strongly in reduced light<\/li>\n\n\n\n
      • Establishes quickly to fill empty spaces<\/li>\n\n\n\n
      • Provides dense evergreen coverage<\/li>\n\n\n\n
      • Can eventually take over as a new hedge structure<\/li>\n\n\n\n
      • Tolerates pruning and shaping once mature<\/li>\n<\/ul>\n\n\n\n

        Bamboo grows up through the thinning conifers, gradually masking the die-back. Over time, the old conifers can be reduced or removed, leaving a cohesive evergreen screen.<\/p>\n\n\n\n

        Recommended Bamboo Varieties<\/strong><\/h3>\n\n\n\n

        All of the following are clump-forming Phyllostachys varieties<\/strong> appropriate for screening:<\/p>\n\n\n\n

          \n
        • Golden Bamboo \u2013 Phyllostachys aureocaulis<\/em><\/strong>
          Upright, bright golden canes, excellent for adding colour and height.<\/li>\n\n\n\n
        • Black Bamboo \u2013 Phyllostachys nigra<\/em><\/strong>
          Attractive ebony canes that darken with age; ideal for feature screening.<\/li>\n\n\n\n
        • Green Bamboo \u2013 Phyllostachys bissettii<\/em><\/strong>
          One of the toughest and densest varieties; perfect for replacement hedging.<\/li>\n<\/ul>\n\n\n\n

          These species are non-invasive when managed correctly and can be shaped to match the existing hedge line.<\/p>\n\n\n\n

          \n\n\n\n

          Long-Term Management Tips<\/strong><\/h2>\n\n\n\n

          To improve the lifespan of both existing conifers and replacement planting:<\/p>\n\n\n\n

            \n
          • Feed annually<\/strong> with a balanced slow-release fertiliser<\/li>\n\n\n\n
          • Mulch heavily<\/strong> to improve soil moisture and microbial health<\/li>\n\n\n\n
          • Prune lightly but regularly<\/strong>, avoiding cutting into old wood on conifers<\/li>\n\n\n\n
          • Monitor for fungal infections<\/strong> and treat early<\/li>\n\n\n\n
          • Water deeply during prolonged dry periods<\/strong>\u2014a growing issue in UK summers<\/li>\n<\/ul>\n\n\n\n

            With proper care and strategic replanting, thinning conifer hedges can be restored or transitioned into a new, longer-lasting evergreen screen.<\/p>\n","protected":false},"excerpt":{"rendered":"

            Leylandii Hedge Managing and Reviving Thinning Conifer Hedges As the UK climate continues to warm and weather patterns become more erratic, conifer hedges\u2014particularly Leylandii and other fast-growing species\u2014are becoming increasingly vulnerable to stress, fungal...<\/p>\n","protected":false},"author":1,"featured_media":5478,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-239","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-head-gardener"],"_links":{"self":[{"href":"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-json\/wp\/v2\/posts\/239","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-json\/wp\/v2\/comments?post=239"}],"version-history":[{"count":0,"href":"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-json\/wp\/v2\/posts\/239\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-json\/wp\/v2\/media\/5478"}],"wp:attachment":[{"href":"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-json\/wp\/v2\/media?parent=239"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-json\/wp\/v2\/categories?post=239"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gardenadvice.co.uk\/gardening-tips\/wp-json\/wp\/v2\/tags?post=239"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}