Ask a Question
Notify Me On Question Update
Email this Question
When do I spray my lawn for weeds?
Rate This FAQ
Broadleaf weeds usually appear in lawns early in May. Pre-emergent herbicides may be applied before then to help prevent weed establishment. Once weeds have emerged, use a post-emergent type of herbicide.
In lawns, kill broadleaf (non-grassy) weeds with broadleaf weed killers. NOTE: Herbicides containing 2,4-D or should not be applied when the temperature is above 85 degrees F. or when weather is windy. In areas where complete vegetative control is needed, glyphosate (Roundup) will kill almost all living plants. Overspray of glyphosate can severely damage non-target plants. Follow label instructions when using any chemical sprays.
Submit Your Suggestion
Other Questions In This Topic
- I've neglected to do my "last mow" up to this point. We've already had several nights of light frost. My grass is long but I worry about causing even more damage by mowing at this late juncture, mid-November. Are there any risks to mowing grass after the first few frosts?
- Do I need to prune my trees this spring?
- I am an architect, working with a client who wants to hydroseed a 2.5 acre parcel for use as a softball field. The area is currently planted in alfalfa. There will be some regrading (both cut and fill) of the field that will be required. The client would still like to hydroseed this year, likely near the end of September. Do we need to call for the alfalfa to be treated with a herbicide? If so, what is the process, and what herbicide should be used? Is there a waiting period between application of the herbicide and the hydroseeding? Must the herbicide be applied to the above-grade plants, or can the site first be cleared, then the herbicide applied to the gound and roots?
- I notice groups of about 4 or 5 pine needles buried into the flower beds and am wondering what type of bug is pulling them into the ground in the fall. They do not get ther naturally because of the way they are sticking out of the ground. Half buried. I am just wondering what creature this might be and do I need to do something about it?
- I am buying a new house in Salt Lake County, and the entire back yard is weeds. I want to put in a garden towards the back and fill in the rest with grass. What is the best way to kill the weeds completely, without killing the new grass and affecting the garden?
- I wanted to ask your opinion on fertilizing my lawn. I have so many weeds this year that I don't know what to do. The lawn is currently being fertilized by a company that comes out every 2-3 months. I started using them at the end last summer but maybe I selected the wrong company. Could you give me a recommendation on what to do to cut down on the weeds? Should I switch to a different company or do you recommend fertilizing myself? Thanks, Ryan
- There are yellow jackets in my yard, how do I control them?
- Do you have tips on managing grasshoppers in my yard?