Floss Flower (Ageratum houstonianum)

Common names:
Give a thumbs up Floss Flower
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Give a thumbs up Mexican Paintbrush
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Botanical names:
Ageratum houstonianum Accepted
Ageratum mexicanum Synonym

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Dry
Minimum cold hardiness: Zone 9b -3.9 °C (25 °F) to -1.1 °C (30 °F)
Plant Height: 20 inches (50 cm)
Leaves: Broadleaf
Flowers: Showy
Flower Color: Lavender
Bloom Size: Under 1"
Flower Time: Summer
Uses: Groundcover
Suitable as Annual
Wildlife Attractant: Bees
Pollinators: Moths and Butterflies

After the rain.

Photo gallery:
Location: my garden, Gent, BelgiumDate: 2006-07-07After the rain.
By bonitin
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Location: Woodbridge , VaDate: 2017-05-08
By krobra
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Location: Canada
By Prosedda
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 Courtesy Outsidepride
By vic
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Location: Mentor on the LakeDate: 2018-10-04
By Samlav
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Location: Mentor on the LakeDate: 2018-09-13
By Samlav
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 Courtesy Outsidepride
By vic
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Date: 2014-09-08
By Paul2032
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Date: 2014-09-08
By Paul2032
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 Courtesy Outsidepride
By vic
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 Courtesy Outsidepride
By vic
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Location: Mentor on the lake, OhioDate: 2018-06-19Winter sown seedling
By Samlav
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Comments:
Posted by Catmint20906 (Maryland - Zone 7a) on Aug 27, 2014 8:46 PM

Floss Flower (Ageratum houstonianum) is an attractive annual with fluffy blue flowers that bloom from late spring to frost. A native to Central America and Mexico, it has become invasive in some areas. Does well in full sun with some afternoon shade in hot summer climates and likes organically rich soil. Deadheading is not necessary.

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Discussion Threads about this plant
Thread Title Last Reply Replies
Flower Id by herrwood Jun 2, 2017 4:20 PM 4
Anyone recognize this one? by plantladylin Feb 10, 2017 1:57 PM 11
Wildflower or Weed? by GardenGoober Sep 28, 2016 2:28 PM 6
Help with plant ID by ScottD Sep 20, 2016 10:30 PM 4
Tiny blue flowers with many spiny petals by Plantiful Sep 30, 2015 3:30 PM 6
Banner for June 5, 2015 by Dinu by Dinu Jun 8, 2015 4:38 AM 8

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