Floss Flower, Ageratum
Ageratum houstonianum 'Hawaii Royal'

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

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

Regional

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

Fallbrook, California

New Milford, Connecticut

Gold Hill, Oregon

Gardeners' Notes:

2
positives
0
neutrals
0
negatives
RatingContent
Positive

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

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.