Dormancy

    Pineappleweed

    Matricaria discoidea

    Pineappleweed

    Pineappleweed (John D. Byrd, Mississippi State University, Bugwood.org)

    Pineappleweed

    Pineappleweed (Bonnie Million, National Park Service, Bugwood.org)

    Pineappleweed

    Pineappleweed growth habit (Mary Ellen Harte, Bugwood.org)

    Description

    • small (6 –12 inches high) herbaceous annual with lacey leaves and a pineapple smell when disturbed
    • seedlings grow as a rosette, then the plant branches upward into a small bush
    • thrives in harsh soil conditions such as compacted soils and high traffic areas, but not shade
    • will tolerate mowing

    Location

    • gardens, lawns, cropland and open spaces

    Life Cycle

    • summer annual; germinates in early spring and continues to germinate throughout the year
    • flowers can be present all year beginning in late spring

    IPM Recommendations

    • Hand-pull plants in planting beds prior to seed maturation.
    • Maintain healthy, competitive desirable vegetation.
    • Pre-emergent herbicides may not be effective since pineappleweed germinates year round.
    • Apply an appropriate post-emergent herbicide directly to target weeds.