Controlling Grass Weeds in Your Lawn

When this happens you have two options.  Live with it or use a non-selective material like glyphosate (Roundup) and kill the whole area of weedy grasses.  If you have problem areas like this in your lawn, now is a good time to spray the areas so it will kill the grass.  Wait a few weeks for it to die.  When it has turned brown, mow the area shorter than you normally mow your lawn.  Wait a few weeks and if you see any re-growth, you need to spray the area again. 

By now its late August and if you are sure you got all of the weedy grass controlled, you can work up the area and re-seed the area with a grass seed that matches your lawn.  You will need to follow all the steps that you would to establish a lawn.  Once you have it seeded, use a mulch such as straw and keep it watered (2 – 3 times per day) until your grass is starting to grow and then you can water less frequently.

The patched area will take some time to get well established, but by doing it in the fall the grass has the cool weather to grow and develop a good root system.