Re-vegetation requirements include winter rye, which is considered by some to be invasive to native wildflowers planted along the roadway. Is winter rye considered invasive to native wildflowers?
Perrenial Ryegrass (Lolium perenne; introduced cool-season perennial bunchgrass) & related Annual Ryegrass (Lolium multiflorum), are effective competitors for native vegetation as they temporarily produce a dense turf coverage, & are also effective at re-seeding after flowering in the early Spring, providing propagules that emerge the following late Fall providing problems with persistance. It is because of its "success" providing a quick cover that it is utilized in re-vegetation mixes along roadsides and areas requiring control for erosion. There are 3 species that would be a better choice for consideration in seedling mixtures, 2 native to the Continental U.S., all cool-season grasses, cassock or open type bunching grasses and not providing problems associated with persistance. Canada Wild Ryegrass ( Elymus canadensis (Canada wildrye) perennial native), Virginia Ryegrass (Elymus virginicus (Virginia wildrye) perennial native), and Cereal Ryegrass (Secale cereale; annual non-native). I recommend contacting your state Department of Transportation office to find out more about their roadside management programs.
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