"Knapp Weed" is an invasive species, and hard to get rid of. I would like to know if anyone has an idea for killing it.
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Glyphosate Roundup, is the strongest to get rid of this problem!
If you do not want to kill the dirt in this area and want to replant and grow again I would use a mixture of vinegar and salt to kill them. I have done this in the past and it works well. You may need to do this each day. Then you need to dig deep into the ground and make sure you get all the roots out of there.
Use a weed puller.
Are you in the US?
I suggest asking your local home extension office what works best in your area:
pickyourown.org/
What works for someone in one area, may not work for someone in another area.
Post back your area and what they tell you! I hope it is an easy fix!
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