annual

Hawaii Blue Flossflower

Ageratum 'Hawaii Blue'

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Hawaii Blue Flossflower (Ageratum 'Hawaii Blue') at Knupper Nursery

Ageratum 'Hawaii Blue' flowers

Ageratum 'Hawaii Blue' flowers

(Photo courtesy of NetPS Plant Finder)

Hawaii Blue Flossflower (Ageratum 'Hawaii Blue') at Knupper Nursery

Ageratum 'Hawaii Blue' in bloom

Ageratum 'Hawaii Blue' in bloom

(Photo courtesy of NetPS Plant Finder)

Height:  10 inches

Spacing:  8 inches

Sunlight:  full sun  partial shade 

Hardiness Zone:  (annual)

Group/Class:  Hawaii Series

Ornamental Features

Hawaii Blue Flossflower has masses of beautiful blue flat-top button flowers at the ends of the stems from late spring to mid fall, which are most effective when planted in groupings. Its pointy leaves remain green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Hawaii Blue Flossflower is a dense herbaceous annual with a mounded form. Its medium texture blends into the garden, but can always be balanced by a couple of finer or coarser plants for an effective composition.

This plant will require occasional maintenance and upkeep. Trim off the flower heads after they fade and die to encourage more blooms late into the season. It is a good choice for attracting butterflies to your yard, but is not particularly attractive to deer who tend to leave it alone in favor of tastier treats. It has no significant negative characteristics.

Hawaii Blue Flossflower is recommended for the following landscape applications;

  • Mass Planting
  • Border Edging
  • General Garden Use
  • Container Planting
  • Hanging Baskets

Planting & Growing

Hawaii Blue Flossflower will grow to be about 10 inches tall at maturity, with a spread of 12 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 8 inches apart. Its foliage tends to remain low and dense right to the ground. This fast-growing annual will normally live for one full growing season, needing replacement the following year.

This plant does best in full sun to partial shade. It does best in average to evenly moist conditions, but will not tolerate standing water. It is not particular as to soil type or pH. It is highly tolerant of urban pollution and will even thrive in inner city environments. This particular variety is an interspecific hybrid. It can be propagated by cuttings; however, as a cultivated variety, be aware that it may be subject to certain restrictions or prohibitions on propagation.

Hawaii Blue Flossflower is a fine choice for the garden, but it is also a good selection for planting in outdoor containers and hanging baskets. It is often used as a 'filler' in the 'spiller-thriller-filler' container combination, providing a mass of flowers against which the thriller plants stand out. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.

 
 
Hardiness Zone Plant Height Minimum Sunlight
Characteristics
Massing  Edging  Garden  Container  Basket 
Applications
Flowers  Attracts Wildlife 
Ornamental Features

Knupper Nursery's Plant Finder is intended to be used for informational purposes only. It does not reflect what is currently in stock at Knupper's. We do not sell plants over the internet or ship plants outside of our local delivery area. Please call us at 847.359.1080 for plant availability.