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Winter Care Gunnera?

Do I have to give any particular Winter care to my new Gunnera situated in semi shade in the (very deep) Bog Garden?

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  • ObelixxObelixx Vendée, Western FrancePosts: 22,209

    Hi BF.  They don't like frost so cover the crown with one or two of its big, old leaves and then pour a generous wheelbarrow of garden compost over it.  It will grow thru again when ready in spring.

    This worked fine for me for two gunneras for several years of much colder winters than you will get until the years when an unexpected and early frost got them in the first week of October.  My 3rd attempt stayed in a pot and was brought in over winter to an unheated but bubble wrapped greenhouse and then potted on in spring.

    It has come with me to this garden and will now have to be broken out of its latest pot.  It will be planted out on the edge of the pond here once chappy has been with his bulldozer thingy to hoik out all the bullrush and brambles.  Given the 16 month drought here my main worry is going to be water, not frosts but I plan to water it all thru the growing season next year till it gets its roots down.  

    "We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
  • LoanaLoana Posts: 427

    Hi bio, i'm in norfolk and my potted gunnera went through last winter with no protection and i repotted in spring. I'll be movng it to a sheltered position in the garden and look out for frost forecasts and throw something over it for a that period ? I love my gunnera, has thrived in a pot with lots of watering and a slow release fertiliser

  • Hostafan1Hostafan1 Posts: 26,165

    One of mine is actually in the water at the edge of the lake, the other is beside a small pond, I don't really do anything with them ( Devon ) Both are thriving.

    Devon.
  • ObelixxObelixx Vendée, Western FrancePosts: 22,209

    It depends on where you are Hosta.  My two were wiped out by -8C before they had gone completely dormant.  Not good.  This 3rd - and last - attempt, spent winter outside in its pot against a southern facing wall and coped with a  -6C in January and all I'd done was protect it from northerly and easterly winds and cover its crown with the old leaves.   Being dry helped I'm sure rather than in cold wet ground.

    "We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
  • hogweedhogweed Central ScotlandPosts: 3,992

    O live in Central Scotland so a lot colder and for longer up here. Round about now I cut the leaves and fruit off the gunnera and put a couple of the leaves back over the crown. That is all the protection it gets. It has even come through the really bad winter we had a couple of years ago when the snow came at the end of November and stayed until the end of January. We breed them tough up here!

    'Optimism is the faith that leads to achievement' - Helen Keller
  • Hostafan1Hostafan1 Posts: 26,165

    Obs says " It depends on where you are Hosta." 

    Indeed so. One of mine was brought from my last garden in Hants where it regularly went down to about -10 each winter, but sandy soil. Here we've had -7 in the polytunnel, so colder outside. 

    I'm sure they're just a wee bit fickle and just like to tease us eh?image

    Devon.
  • hogweedhogweed Central ScotlandPosts: 3,992

    Having said that now the blinking thing will probably die on me this winter! It is Gennera tinctoria that I have if that makes a difference.

    'Optimism is the faith that leads to achievement' - Helen Keller
  • biofreakbiofreak Posts: 807

    Thanks for info -We have Jersey weather here in Normandy so I hope that it will be OK. It's only a youngster with only 2 big leaves -Can I fleece it?

  • Nanny BeachNanny Beach Posts: 3,753

    Mine is in the pond, so cant cover it with compost, its in a pot, so in cold frame then.

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