Annual Ryegrass

    Lolium multiflorum

    Annual Ryegrass

    Annual ryegrass (Harry Rose,

    Annual Ryegrass

    Annual ryegrass clasping auricles (Syngenta Lda.,

    Annual Ryegrass

    Annual ryegrass seed heads (Harry Rose,


    • bunching growth habit growing 1 – 2 1/2 feet tall; clasping auricles
    • leaves rolled in the bud; dark green with prominent veins


    • landscape, roadsides, open spaces and occasionally lawns
    • commonly planted in agricultural fields for weed suppression and included in lawn seed mixes as a temporary quick-establishing grass

    Life Cycle

    •  annual germination in late summer and fall

    IPM Recommendations

    • Frequently hand-pull aboveground structures prior to seed maturation to prevent re-seeding.
    • Apply an appropriate pre-emergent herbicide prior to seed germination.