type of grass, weeds, and herbcide

Asked June 1, 2017, 10:46 PM EDT

Hi, I wanted to do weed control and the company that sells weed killers wants to know what type of lawn we have here in our area (20854) so they can recommend the best weed killer without harming my lawn. Attached are the major weeds that I have on my lawn. If you can tell my what type of lawn we have in Montgomery County MD, and what works best to kill the weeds, I'd truly appreciate it! With best regards!

Montgomery County Maryland herbicides invasive stilt grass lawn weed

1 Response

The recommended lawns for Maryland homeowners is turf-type tall fescue.
Do you have much of that? If your lawn is 50% weeds or more, it may be time for a renovation. Here is our lawn page: http://extension.umd.edu/hgic/plants/lawns

If you decide to do this yourself, we have all the information you'd need. First take a look at this page: https://extension.umd.edu/hgic/lawns-tips-weed-control
Weeds are put into categories, because their type and growth habits (and thus successful control) are based on this. For instance, there are grassy weeds and broad-leaved weeds, and they are further broken down by whether they are perennial, which come back each year, or annual.
Grassy perennials are the most challenging.

Your first photo shows a tough invasive annual weed called Japanese Stilt Grass. If the patch is not large, it is easy to pull. (In any event, don't let it flower and go to seed or you will have more of it next year.) Its control is based on a fall application of pre-emergent herbicide.

It and the others can be found on our Lawn Gallery page here:

https://extension.umd.edu/hgic/weeds

Additionally, we see wild or mock strawberry, native violets, broad-leaved plantain, scarlet pimpernel, clover, wood sorrel, veronica, and mustard.

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