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PlantFiles: Floss Flower, Ageratum
Ageratum houstonianum 'Hawaii Royal'

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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Ageratum (ad-jur-RAY-tum) (Info)
Species: houstonianum (hoos-toh-nee-AH-num) (Info)
Cultivar: Hawaii Royal

2 members have or want this plant for trade.

Category:
Annuals

Height:
6-12 in. (15-30 cm)

Spacing:
3-6 in. (7-15 cm)

Hardiness:
Not Applicable

Sun Exposure:
Sun to Partial Shade

Danger:
Unknown - Tell us

Bloom Color:
Blue-Violet

Bloom Time:
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Mid Fall
Late Fall/Early Winter

Foliage:
Herbaceous

Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Suitable for growing in containers

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; direct sow after last frost

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By Scorpioangel
Thumbnail #1 of Ageratum houstonianum by Scorpioangel

Profile:

2 positives
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive CrabgrassCentrl On Jun 14, 2009, CrabgrassCentrl from New Milford, CT wrote:

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 doing the job!

Positive Scorpioangel On Sep 12, 2005, Scorpioangel from Gold Hill, OR (Zone 7a) wrote:

Added these to other pots of plants for fill and color. Wonderful color that holds well. Still blooming into Sept. without much care (other than regular water). I would grow this variety over some of the other blues ... it has just a touch of purple to it.

Regional...

This plant has been said to grow in the following regions:

Fallbrook, California
New Milford, Connecticut
Gold Hill, Oregon



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