Japanese, Giant and Bohemian Knotweed

Also known as Fleece flower, Mexican bamboo or Elephant ear bambooinject (1)
Polygonum Cuspidatum Sieb. & Zucc.
Quick ID:

  • Member of the buckwheat family (Polygonaceae)
  • A shrub-like perennial that originated from Asia
  • Grows to heights in excess of 10 feet
  • Stems are smooth, bamboo-like and stout
  • Stems are hollow, but may be water-filled depending upon soil moisture and time of year


  • Found in parks, gravel bars, along riverbeds, stream banks, rights-of way, and roadsides. It is also found in riparian areas and will move up river columns.

How It Got Here:

  • Originated from Asia and spread west for the last few hundred years (primarily by fragmentation)
  • 10mm of plant can re-grow to maturity.

Reasons for Concern:

  • Can invade and thrive in a variety of habitats with no natural predators or control mechanisms.
  • Knotweed has evolved characteristics that aid the plant in exploiting riparian areas
  • Knotweed reproduces through seeds, rhizomes, and sprouting from stem pieces which can move quickly down a riverbed and create new infestations.
  • Knotweed can cause reduced land value due to its invasive nature.
  • Canes can sprout through 6 inches of concrete or asphalt. (roads & foundations)


11 Responses to “Japanese, Giant and Bohemian Knotweed”

  1. Free Stuff May 1, 2019 at 4:39 pm #

    Yet another issue is that video games can be serious as the name indicated with the principal focus on finding out rather than amusement. Although, it comes with an entertainment part to keep the kids engaged, every single game will likely be designed to work towards a specific experience or curriculum, such as instructional math or scientific disciplines. Thanks for your article.

  2. Free Stuff May 2, 2019 at 2:51 pm #

    One thing is one of the most frequent incentives for making use of your cards is a cash-back as well as rebate provision. Generally, you’ll receive 1-5 back with various acquisitions. Depending on the cards, you may get 1 back on most expenses, and 5 back again on buying made in convenience stores, filling stations, grocery stores in addition to ‘member merchants’.

  3. Meg Grengs May 8, 2019 at 4:40 am #

    as I website possessor I conceive the articles here is real wonderful, regards for your efforts.

  4. buy youtube views May 10, 2019 at 2:57 pm #

    hello!,I like your writing so much! share we communicate more about your post on AOL? I require a specialist on this area to solve my problem. May be that’s you! Looking forward to see you.

  5. Lucina Arruda May 11, 2019 at 7:15 pm #

    An fascinating discussion is price comment. I believe that you should write extra on this matter, it may not be a taboo topic but generally individuals are not enough to talk on such topics. To the next. Cheers

  6. This is very exclusive…in my view…

  7. How can they do this?

  8. no credit check credit cards May 18, 2019 at 1:56 pm #

    What…? ;D

  9. realppvtraffic May 18, 2019 at 4:34 pm #

    This is perfectly written and I completely agree!

  10. gamefly free trial May 20, 2019 at 1:38 am #

    Hi there, i read your blog from time to time and i own a similar one and i was
    just wondering if you get a lot of spam feedback?

    If so how do you reduce it, any plugin or anything you can suggest?
    I get so much lately it’s driving me crazy so any support
    is very much appreciated.

  11. how to get help in windows 10 May 21, 2019 at 2:41 pm #

    Hey there! I’ve been reading your website for a long time now and finally got the
    bravery to go ahead and give you a shout out from Austin Tx!
    Just wanted to mention keep up the excellent job!

Leave a Reply