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AGERATUM houstonianum (CLOUD NINE™ BLUE)

Image of Ageratum houstonianum 'Balclinebu' (CLOUD NINE™ BLUE, CLOUD NINE™ SERIES) PPAF

Maureen Gilmer

Family

Asteraceae

Botanical Name

AGERATUM houstonianum 'Balclinebu'( CLOUD NINE™ BLUE, CLOUD NINE™ SERIES) PPAF

Plant Common Name

Ageratum, Blue Mink, Cloud Nine™ Blue Ageratum, Flossflower

Special Notice

This entry has yet to be reviewed and approved by L2G editors.

General Description

Fluffy, cool lavender to violet-blue flowers bedeck Cloud Nine™ Blue flossflower ('Balclinebu')when temperatures are not hot and growing conditions favorable. Though technically a tender perennial, flossflower is widely grown as an annual bedding plant. It is native to Mexico and Central America where it grows as an evergreen subshrub with a dense, bushy habit, but it has also become naturalized in tropical and subtropical countries across the globe. The Cloud Nine Series was developed by Ball Horticultural Company and are propagated by cuttings.

The fragrant foliage is deep medium green, heart-shaped and has scalloped edges. Throughout the season, as long as it is not too hot, a plant produces numerous clusters of fluffy, spidery flowers of pale blue-violet to lavender. Bees and butterflies pollinate the lightly fragrant flowers. The spent blooms should be removed to encourage continuous bloom and to keep the plants looking clean.

Flossflower is easily grown and excels in garden sites with full sun and average soil with moisture and good drainage. Where summers are hot, Cloud Nine™ Blue's foliage can wither and flowering cease. Thus, plants may flower more continually in locations with partial sun. These ornamental are rarely bothered by deer and have few pest and disease problems. Enjoyed as a colorful bedding plant since the Victorian times, flossflower looks best in containers or mixed borders with other brightly colored, sun-loving ornamentals. In tropical regions the plants can be evergreen perennials and have their best flowering performance in the comfortable dry season.

Unfortunately, Ageratum houstonianum has escaped from cultivation in many frost-free regions globally and is considered a problematic, invasive weed-—especially because its foliage is toxic to grazing ruminants. To learn more see the report by the Pacific Island Ecosystems at Risk (PIER) : http://www.hear.org/pier/scientificnames/..%5Cspecies%5Cageratum_houstonianum.htm

Characteristics

  • AHS Heat Zone

    12 - 1

  • USDA Hardiness Zone

    10 - 13

  • Sunset Zone

    A1, A2, A3, H1, H2, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 20, 21, 22, 23, 24

  • Plant Type

    Tender Perennial

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    6"-8" / 15.2cm - 20.3cm

  • Width

    8"-10" / 20.3cm - 25.4cm

  • Bloom Time

    Indeterminate

  • Native To

    Mexico, Central America

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Average

  • Soil type

    Loam, Sand

  • Growth Rate

    Fast

  • Habit

    Cushion/Mound-forming

  • Seasonal Interest

    Spring, Summer, Fall, Winter

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Lavender, Blue Violet

  • Fruit Color

    Brown

  • Foliage Color (Spring)

    Green

  • Foliage Color (Summer)

    Green

  • Foliage Color (Fall)

    Green

  • Foliage Color (Winter)

    Green

  • Fragrant Flowers

    Yes

  • Fragrant Fruit

    No

  • Fragrant Foliage

    Yes

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Semi-Double

  • Repeat Bloomer

    Yes

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    No

  • Foliage Texture

    Medium

  • Foliage Sheen

    Matte

  • Evergreen

    Yes

  • Showy Bark

    No

Special Characteristics

  • Usage

    Bedding Plant, Container, Cutflower, Edging, Mixed Border, Tropical

  • Sharp or Has Thorns

    No

  • Invasive

    Sometimes

  • Attracts

    Butterflies

  • Self-Sowing

    Yes