Ask the Expert: killing weed without killing cotoneaster
What is this weed growing under my cotoneaster shrubs, and how can I kill the weeds without killing the cotoneaster? I have Trimec Plus for post emerge grass weeds, but would that be safe to spray on the cotoneaster to get at the weeds underneath? Rex
Plant Expert Reply:
What you have is called vetch. It is a weed that we find often in lawns, but will also present itself in shrub beds. Trimec Plus is a product for lawn/turf application only. I would not recommend spraying it on your cotoneaster since it is a “broadleaf” killer. Cotoneaster is considered a broad leaf and therefore Trimec would damage the Cotoneaster. Instead I would wick it with a contact killer like Roundup or Hi Yield Killzall.
The method of wicking involves applying the chemical only to the plant you want to kill. You can surround your cotoneaster with a piece of cardboard and then spray the weed. Or you can take a piece of absorbent material and dip in chemical and then touch the weed.
I usually pull this weed and apply a pre-emerge granule to the soil to keep it from coming up again. I use a product called American weed and grass stopper about twice a year in my beds.
You can get all of the products I mentioned at your local garden center and nursery.
This Flower Shop Network weed identification was brought to you by Houston Florists