weed determination

Asked June 7, 2018, 9:42 AM EDT

I am getting a weed in my back yard that I can not kill and do not know what it is. The yard was once a wooded area. I have tried preemergent grab crass killer and weed killer, no luck. It grows in mid to late may. Can you help me? Picture provided

Howard County Maryland

1 Response

The photo is blurry, but we think it may be stiltgrass, a foreign invasive grass that has spread like wildfire in the past 10 years all throughout Maryland and the East Coast. Here is help: https://extension.umd.edu/hgic/problems/japanese-stiltgrass You'll notice that not all pre-emergents are effective on this grass.

If this does not look right to you, try sending another photo.