I know this is not a gardening newsgroup, but I don't know where else to go for help. Hopefully, someone can assist me.
I have this pesky Johnson Grass (also known as Orchard Grass) invading my lawn. I am very fussy about my grass, and this is a small area that measures 1,250 square feet.
A professional lawn service came out, and said to spray the spots with Roundup and once that grassy areas dies, to rake and apply a good quality of grass seed.
I have been doing this for two weeks, and every morning I find more Orchard Grass. It is overwhelming to me.
I think this problem is coming from my neighbor's yard as Johnson Grass spreads seeds/spores by the wind and birds.
If I get new sod laid, I may still have this problem later on.
I am seriously thinking about applying Roundup over the entire grassy area, then putting a heavy plastic over the top of the grass once it is cut short, and having decorative rock hauled in and put over the top. This way, I don't have to worry about the Johnson Grass coming back, and if it does, I can simply spray it and not have a bad looking area in my front yard as it will be all rock.
Has anyone here had this problem?
Do you see any reason why I can't just leave the old sod down, spray over it, cover with plastic, and apply rock?
I can easily reconfigure my underground sprinkler system.
How long would I need to leave the Roundup on the old grass before covering it with plastic and rocks?
Many, many thanks to anyone who can help me.
It is so much appreciated.
Kate