Perennial ryegrass is susceptible to a moderate number of fungal diseases and gray leaf spot can be especially problematic. It is not recommended to establish PRG as a monostand. Tall Fescue- (TF) ...
Both annual and perennial ryegrass are often included in many fescue-blended lawn seed products. Unfortunately, ryegrasses are fierce competitors with fescue and bluegrass, causing serious problems.
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