I've been told that the two weeds that seem to be invading my lawn are Orchard Grass and Dallisgrass. Apparently, these two aren't easy to control and there isn't a selective herbicide that will kill them without affecting the surrounding lawn (in my case, fescue). I'm near Raleigh, NC.
Any ideas on how to deal with this problem? I do plan to overseed in late September or early October...
Thanks,
-jav
Dallisgrass, I dunno. Orchard Grass in Fescue is a bummer. About all you can probably do is use a broad spectrum herbicide (such as glyphosate), spot spray, and be careful. A dye would help tremendously. Don't hurry and it can be done easily.
When you overseed, make sure you buy good quality seed. Orchard Grass is quite often included in a mix because of its usefulness in pastures. Look for lawn seed that says it has NO "other crop seed", listed. Even one-half of 1 percent orchard grass in a tall fescue mix can result in a dozen or more orchard grass seeds per square foot.
HTH
"Crabgrass, Nutgrass & Dallis Grass Killer" made by Ferti-lome, works like a charm, altho I don't know about 'orchard grass'. My bottle is several years old, don't know if they're still in business.
Active ingredient is: monosodium acid metharsenate
I mix a small amount in a trigger spray bottle and spot-spray, rather than treating entire lawn. Reduces risk of burning fescues.
Ortho has a weed killer that contains a grassy weed killer, I believe. Look up grassy weeds on their site (ortho.com)
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