Ageratum, Floss Flower, Flossflower 'Hawaii Royal'

Ageratumhoustonianum

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Ageratum (ad-jur-RAY-tum)
Species
houstonianum (hoos-toh-nee-AH-num)
Synonym
Sun Exposure
Sun to Partial Shade
Foliage
Herbaceous
Height
6-12 in. (15-30 cm)
Spacing
3-6 in. (7-15 cm)
Hardiness
Not Applicable
Bloom Color
Blue-Violet
Bloom Time
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Mid Fall
Late Fall/Early Winter
Other Details
Category
Annuals
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Can be grown as an annual
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Propagation Methods
From seed; direct sow after last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Seed Collecting
Regional

This plant is said to grow outdoors in the following regions:

Fallbrook, California(5 reports)

New Milford, Connecticut

Gold Hill, Oregon

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Gardener's Notes:

2
positives
0
neutral
0
negative
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C
New Milford, CT | June 2009 | positive

This is a rare annual for me because it thrives every year, all summer long. Always count on it to add color when perennials aren't yet d...Read More

S
Gold Hill, OR (Zone 7a) | September 2005 | positive

Added these to other pots of plants for fill and color. Wonderful color that holds well. Still blooming into Sept. without much care (o...Read More

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Featured
Ground beetle
(Asaphidion stierlini)
White-browed Scrubwren
(Sericornis frontalis)