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Schmidt: Know Your Lawn Weeds

September 25, 2015
Yolanda Schmidt - County Agent , Pierce County Tribune

Now is the best time to kill perennial weeds in your yard. These weeds are channeling their nutrients down into their roots in preparation for winter. Spray now and the weeds will carry the herbicide throughout its root system. Goodbye weed! Annual weeds do not need to be sprayed. They will die from a hard frost. Keep them mowed so they do not go to seed.

Can you name these weeds? The answers and information on controlling them are at the end of the article.

Weed Matching Game Answers

Article Photos

[Annual (A), Perennial grass (PG), Broadleaf (PB)]

1. Foxtail barley (PG), 2. Field bindweed (PB), 3. Violet (PB), 4. Canada thistle (PB), 5. Foxtail (A), 6. Absinth wormwood (PB), 7. Ground ivy (PB), 8. Quickgrass (PG), 9. Black medic (PB), 10. Crabgrass (A).

Annuals will die from frost. Keep them mowed to prevent them from setting and spreading their seeds.

Perennial grasses can be controlled with a spot-spray of glyphosate (Roundup). Avoid spraying desireable plants. Perennial broadleaves can be controlled with broadleaf weed killers now. Formulations with dicamba or triclopyr are effective in most cases



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