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Weeds #798493

Asked June 29, 2022, 10:36 AM EDT

What should i do about all these weeds? I only want to keep the periwinkle that I have up on the hill...

Carteret County North Carolina

Expert Response

There are a few solutions, but control depends on what are the weeds.  Are they perennial, such as English ivy or cat briar, or are the annuals?  

Persistent weeds will require removal, either yanking them out or by spraying or cut and treat application of a herbicide such as glyphosate or triclopyr.  See https://edis.ifas.ufl.edu/publication/AG245 and https://hgic.clemson.edu/factsheet/smilax-greenbrier/ for more info. Treating cut stems requires pesticide application within less than a minute of cutting.  Use a 10-20% solution of glyphosate.

For annual weeds there are a number of solutions:

(1) You can spray or paint foliage (w/ a brush dipped in herbicide), using a dilute (2%) solution of glyphosate.  Painting lets you target only those plants you wish to kill.

(2) Manually remove weeds (water well beforehand so you get roots).

(3) Use a preemergent herbicide.  This will prevent germination.  Depending on whether your weeds germinate in spring or fall will determine when to apply a preemergent.  See https://bygl.osu.edu/index.php/node/1457 for more info.  Preemergents will not affect plants that are already growing.

Some grasses and sedges are persistent and will require repeated control over time.

Louise Romanow Replied June 29, 2022, 11:15 AM EDT

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