Japanese knotweed

My husband and I looked at a potential investment property in Fort Greene this morning. When we went out to look at the big, tri-level back garden,
I discovered Japanese knotweed growing all over the back and sides of the garden. I’m a volunteer gardener in Central Park and know what a horror
this incredibly invasive plant can be. I don’t want to continue to consider this property before knowing whether landscapers in brownstone
Brooklyn have had success removing and controlling this weed. Any input would be much appreciated!

Guest User | 6 years and 11 months ago

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Guest User | 6 years and 11 months ago

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Thank you! Very helpful.

kevrob | 6 years and 11 months ago

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I’ve dealt with this before and posted on here about it. In my experience, it’s doable, but labor intensive and requires a several-year plan—you won’t clear it all in a single season unless you basically clear the soil and haul it out.

But I’ve had success with the following approach:
-cut all stalks down just above the first “knuckle” then either pour roundup into the inner “cup” or inject it with something like a barbecue syringe.

-dig up particularly dense clumps.

-walk your property every other day
and pull fresh shoots.

-bag everything you cut or pull immediately—most any part of the plant can regrow.

-your chances of success are MUCH greater if it is truly confined to your property or your neighbors are doing the same—it can grow underground 30+ feet before popping up. in my case, it was the neighbors property that was infested, so i did us both a favor and jumped the fence to clear it. three years in, and it’s still a problem on his side but manage able on mine. i don’t think about it much anymore—it’s just become part of the garden maintenance. but that first year—ugh, it was like a part time job.