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Dahlia advice please

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  • Dahlia advice please

    Hi, as I am disabled, my daughters help out with the manual jobs in my small garden. They surprised me the other day by planting dahlias along a border for me. I believe you are supposed to dig up the tubers before Winter and dry them out? What would happen if I cut the plants down to soil level and left them in the ground? Thank you.
    Just when you make ends meet, someone moves the ends.

  • #2
    As long as you don't get any really hard penetrating frosts they should be fine.

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    • #3
      The RHS site recommends covering the tubers with either compost or bark chippings to protect them :-

      Dahlia / Royal Horticultural Society
      Location....East Midlands.

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      • #4
        Hi potgardener, im not far away from you in Lewes. We grow Dahlias in the ground in Preston Park in Brighton every year and we leave them in the borders. We just put a good....up to 6" mulch of bark chippings, compost, leaf litter or anything you want to insulate the tubers.

        Good luck
        Please visit my facebook page for the garden i look after

        https://www.facebook.com/PrestonRockGarden

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        • #5
          My Dahlias made it through last winter, but then I am on the English Riviera
          photo album of my garden in my profile http://www.growfruitandveg.co.uk/gra...my+garden.html

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          • #6
            I have similar success / failure rates by lifting/storing or by leaving the dahlias in the ground. But I think that leaving them is safest if you can give some protection on the coldest winter spells and keep the slugs away in early spring.
            My gardening blog: In Spades, last update 30th April 2018.
            Chrysanthemum notes page here.

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            • #7
              Originally posted by PotGardener View Post
              I believe you are supposed to dig up the tubers before Winter
              Only if they're in waterlogged clay soil (in which they rot).

              If you have mild winters, and/or sandy soil, they should be just fine in the ground.

              I leave mine in the ground until early spring, then I dig up a few to force in the greenhouse, and take leaf cuttings from them to increase my stock.
              All gardeners know better than other gardeners." -- Chinese Proverb.

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