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    • Photo of Ageratum houstonianum by Zephs

    Photo by Zephs

    Used with permission, all rights reserved

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    Ageratum houstonianum

    Also Known As

    • Floss Flower

    Plant type

    annual / biennial

    size

    • H: 1'-3'
    • W: 1'-3'

    planting zones

    • 2a-12

    More Options

    Ageratum houstonianum plant details

    Ageratum houstonianum is a broadleaf deciduous annual / biennial with green foliage. In fall and summer lavender flowers emerge. Attracts bees, beneficial insects and butterflies making it an excellent addition to pollinator gardens. Grows well with sun - dappled shade and even moisture - regular water. Does well in average, rich and well-drained soil. A good option if you're seeking something heat tolerant, humidity tolerant and verticillium wilt resistant.

    CHARACTERISTICS OF Ageratum houstonianum

    Plant type: annual / biennial
    Plant family: asteraceae
    Foliage: deciduous green
    Mature size: 1 FT - 3 FT - wide, 1 FT - 3 FT - tall
    Flowers: lavender blooms in fall and summer

    GROWING CONDITIONS for Ageratum houstonianum

    USDA Zones: 2a - 12
    Sun exposure: sun - dappled shade
    Watering frequency: even moisture - regular
    Resistant to: deer and rabbit, heat, humidity and verticillium wilt
    Soil needs: average, rich and well-drained

    Nursery contributed plant descriptions

    A robust perennial form of the common bedding annual Floss flower from Mexico and grown in Australia for many years, its origins lost in the mists of time. Forms a stiff shrub clothed in softly haired, triangular, mid green leaves, cupping in a dryer atmosphere. Tight clusters of light blue, pompom-like flowers are produced throughout the year on long stems, making it perfect for picking and very popular in the florist trade. Dead head and prune regularly when in active growth, never to dead wood, to promote flowering. Starts riots in the butterfly world, particular among Monarchs and Lesser Wanderers who find it irresistible. Clay soil is unacceptable, otherwise easily grown in soft conditions. Will suffer in all but the mildest frosts..

    By: Zephs

    Gardening facts about Ageratum houstonianum plant

    How to Grow Ageratum houstonianum

    • Sun Exposure

      • sun - dappled shade

    • Water Needs

      • even moisture - regular

    • Soil Needs

      • average
      • well-drained
      • rich

    • Special Situation

      • heat tolerant
      • humidity tolerant
      • verticillium wilt resistant

    Features

    • Foliage Color

      • green

    • Flower Color

      • lavender

    • Wildlife

      • beneficial insects
      • bees
      • butterflies
      • deer resistant
      • rabbit resistant

    • Flower Season

      • summer
      • fall

    • Foliage Season

      • deciduous

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