General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Partial or Dappled Shade
Water Preferences: Mesic
Dry Mesic
Dry
Minimum cold hardiness: Zone 10a -1.1 °C (30 °F) to +1.7 °C (35 °F)
Maximum recommended zone: Zone 13
Plant Height: 18 inches
Plant Spread: 12 - 18 inches
Flowers: Showy
Flower Color: Lavender
Flower Time: Late spring or early summer
Summer
Late summer or early fall
Fall
Late fall or early winter
Uses: Cut Flower
Suitable as Annual
Wildlife Attractant: Bees
Butterflies
Resistances: Deer Resistant
Rabbit Resistant
Drought tolerant
Pollinators: Moths and Butterflies
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots
Awards and Recognitions: RHS AGM

Image
Common names
  • Ageratum
  • Floss Flower

Photo Gallery
Location: St Louis - Missouri Botanical Garden
Date: 2023-08-05
Location: At Annie's Annuals Nursery
Date: Sep 14, 2008 1:10 PM

Photo courtesy of Harris Seeds
  • Uploaded by Joy
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2011-07-21

Photo courtesy of Annie's Annuals and Perennials
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2011-07-21
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2011-07-21
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2011-07-21
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2011-07-21

Photo Courtesy of Select Seeds. Used with permission.
  • Uploaded by Joy

Photo courtesy of Annie's Annuals and Perennials
  • Uploaded by Joy

Photo courtesy of Annie's Annuals and Perennials
  • Uploaded by Joy
Location: Annie's Annuals Nursery
Photo courtesy of Annie's Annuals and Perennials

Date: August
credit: Dwight Sipler

Photo by Krzysztof Ziarnek, Kenraiz
This plant is tagged in:
Image Image

Comments:
  • Posted by sucrose (Ohio - Zone 6a) on Jul 2, 2021 8:57 AM concerning plant:
    Blue horizon has tall flower stems, makes great cut flower. Better to buy container grown instead of growing from seed. Cut back initial flowers to boost growth and blooming.

« Add a new plant to the database

« The Plants Database Front Page

Today's site banner is by Zoia and is called "Charming Place Setting"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.