japanese knotweed

Field General

LawnSite Member
northeast ohio
I would like to kill an area that is infested with Japanese knotweed. I am going to use Crossbow with either weed oil or diesel fuel per the label. I also have a grass area that has Japanese knotweed in it. I am going to go with the crossbow mixed at a higher rate with water.

Feedback is appreciated. Thanks.


LawnSite Member
F.G. I will let you in on a secret. Probably not really a secret, but in the lawn area, a 24-D ester formulation will work very well. DO NOT use this in 80 degrees or better temps. If the plants are large, mow / cut them back, and when they start to leaf out again,that is when to treat them. Hope this helps you.


LawnSite Member
western nc
good luck killing that stuff.... it's a real pain... catch it early w/ crossbow and stay on top of it....

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