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Killing Japanese Anemone

Lizzie27Lizzie27 Posts: 12,494
in The potting shed
I'm thinking about covering over the base of the main plant with black plastic with a paving slab on top. Would I be right in thinking though that the suckers will get the message and start growing even more strongly?
North East Somerset - Clay soil over limestone
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Posts

  • Hostafan1Hostafan1 Posts: 34,889
    I've been given about 120 which are going down to the lake.  Water on one side, and mower on the other side.
    Devon.
  • ScarletmistScarletmist Posts: 23
    My Japanese Anemone started of by the pond years ago and they have worked their way round the garden. The only way to get rid of them is to dig them up and get all the root out. I quite like them as they give a bit of tall colour and are undemanding. 



  • LoxleyLoxley Posts: 5,698
    They are gorgeous, but so hard to control if they decide to go rogue. The ones in the front garden in Bristol took multiple kettles of boiling water and applications of glyphosate to get rid of (but were soon showing signs of coming back after I thought they had gone). I suspect a piece of black plastic is going to be insufficient!
    "What is hateful to you, do not do to your neighbour". 
  • Papi JoPapi Jo Posts: 4,254
    I'm surprised at the regular complaints about Japanese anemone being invasive. I have 2 different cultivars in the garden, under a pergola, and they do not thrive at all. I wish they were more invasive. :(
  • Lizzie27Lizzie27 Posts: 12,494
    Oh dear , I expected as much. My big ten year old clump of pink ones are coming up in the nearby lawn,  down 3ft under a wall to the drive and are now trying to undermine a large clump of Stipa s gigantica . Do you think brushwood killer would do the trick, I can't physically dig it out.
    North East Somerset - Clay soil over limestone
  • LoxleyLoxley Posts: 5,698
    Papi Jo said:
    I'm surprised at the regular complaints about Japanese anemone being invasive. I have 2 different cultivars in the garden, under a pergola, and they do not thrive at all. I wish they were more invasive. :(
    They sit quietly until they find an area where weeding them out would be physically impossible, and then they go nuts!
    "What is hateful to you, do not do to your neighbour". 
  • Lizzie27Lizzie27 Posts: 12,494
    Correct @Loxley!
    North East Somerset - Clay soil over limestone
  • bertrand-mabelbertrand-mabel Posts: 2,697
    Our small clump of Japanese anemones were not invasive to the end that we only had them in the garen for 4 years and then they disappeared.
    Why? No idea.
    We see them in other gardens in the village doing ok but not invasive
  • Lizzie27Lizzie27 Posts: 12,494
    Probably too dry? @bertrand-mabel. I believe they like heavy moisture soil .
    North East Somerset - Clay soil over limestone
  • SporophyteBoySporophyteBoy Posts: 118
    In the nursery where I trained nearly 60 years ago, we had a patch of white and pink Anemone japonicum about quarter of an acre naturalised for about a 100yrs. Their roots were a solid mass of interlocking cords for 6" down and then another 6" to a foot of fibreous roots, each year I was there, a certain amount would be lifted by chopping lumps out with a spade and then these would be parred down still further and potted up for sale the next season. By flowering time the culled zone was indistinguishable from the rest. However; around the edges we also had Pholox which would develop powdery mildew each summer - the last year I was there , it also affected the Anemones and they were never the same again.  There was another large patch of Alstromeria - the common orange variety kept for cut flowers, probably been there since 1835 growing great - the year after I moved on the whole lot died.   
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