Perennial Ryegrass
Perennial ryegrass (Lolium perenne) is a cool-season grass commonly used for lawns, pastures and turf due to its rapid growth and resilience. It belongs to the Poaceae family and is a well-known source of seasonal allergens. During its pollination period—typically late spring to early summer—it releases airborne pollen that can trigger allergic reactions such as hay fever and asthma in sensitive individuals. The allergenic potential of perennial ryegrass makes it a significant component in inhalant allergy testing panels.
Description
It can cause seasonal allergic rhinitis (hay fever), including symptoms such as sneezing, nasal congestion, itchy eyes, and in some cases, difficulty breathing or asthma.
Its pollination typically occurs from late spring to early summer, though timing can vary depending on regional climate.
Yes, it shares similar allergenic proteins with other members of the grass family, so people sensitised to one type of grass may react to others as well.
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