Mystery Plant and bamboo

Asked April 27, 2019, 9:16 AM EDT

Hello! I have some stalks that resemble asparagus emerging from behind my garage. I just moved in and don't know what was planted prior. We do have what I believe was bamboo growing on the opposite side. It did not make the harsh winter and almost all the shoots are dried and dead :( will you please advise me on what this is? And how maybe the best way to eradicate the bamboo that didn't make it! Thank you!

Ramsey County Minnesota

1 Response

It looks like you have Japanese knotweed. As the leaves begin to unfurl on some of the plants, compare to the links below to confirm. The bamboo-like shoots you are seeing are likely the dead knotweed material from the previous year. https://www.maine.gov/dacf/mnap/features/invasive_plants/fallopia.htm Japanese knotweed is considered an aggressive weed in Minnesota and it is recommended that you remove it. It may take a few years to completely eliminate the weed, so be patient and persistent. For removal, it is recommended that you repeatedly physically remove as much as possible. The chemical treatment you can try along with physical removal is glyphosphate. Please see the links below for more information about the weed and it's management including best timing for mechanical and chemical treatment. https://blog-yard-garden-news.extension.umn.edu/2018/06/aggressive-weed-challenges-mn-gardeners.html https://bugwoodcloud.org/mura/mipn/assets/File/Knotweed%20Brochure%205_14_18%20WEB.pdf https://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_017951.pdf Wishing you the best,