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Photo Courtesy of Ball Seed

Ageratum houstonianum 'Hawaii Blue 5.0'

Floss Flower

Ageratum 'Hawaii Blue 5.0' is known for its uniform, compact habit and the longevity of it's fuzzy, mid-blue flowers. It is heat tolerent and ideal for edging, borders and container gardening.

Height: 5-6 Inches

Spread: 9-10 Inches

Color: Mid Blue

Growing Tips for Homeowners:

When it comes to gardening you don't get much easier than ageratum! Although easy to care for, ageratum does not tolerate frost at all. When planting include a granular slow release fertilizer to help keep teh plant going through the season. We also strongly recommend applying a complete balance liquid fertilizer every other week as well. Ageratum can tolerate some shade, but prefers to make a  full sun location its home. A disease to watch out for is root rot. This makes it important that it is planted in a place with well draining soil. Ageratum likes it moist, but standing water will encourage disease. Cut back any blooms that begin to fade not only to help in keepin your plants looking tidy but also to encourage more blooms. 

Characteristics & Attributes:

Attracts Wildlife:

  • Butterflies


  • Heat Tolerant
  • Drought Tolerant
  • Cut Flower
  • Compact

Critter Resistance:

  • Deer Resistant

Design Use:

  • Border
  • Rock Garden
  • Mass Planting
  • Woodland Edge
  • Ground Cover
  • Edging
  • Cut Flower
  • Container


  • Full Sun

Foliage Color:

  • Green


  • Mounding

Season of Interest (Flowering):

  • Summer
  • Spring

Season of Interest (Foliage):

  • Summer
  • Spring

Soil Moisture:

  • Well Drained
  • Moist


  • Compact