Ageratum 'Blue Horizon'
Ageratum 'Blue Horizon'

Ageratum 'Blue Horizon'

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SKU: S70192
1 for $7.95
2 Reviews
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Quick Facts
Common Name: Floss Flower
Hardiness Zone: 1-13S/W Exposure: Sun
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Blooms In: Jun-Sep
Height: 24-30" Spacing: 10-12"
Read our Growing Guide Ships as: 1 PINT 28.86 CU IN.
Deer Resistance: Yes
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Product Details

Product Details

A taller plant than its sibling Artist® Purple, with sturdy stems that won't get beaten down by weather. They are excellent in gardens or bouquets, where their cloud-like clusters of purplish blue flowers weave companions together.

There are perennials and even shrubs in the small genus Ageratum, native to the warm regions of North and South America. But most of us know Ageratum only as an annual for garden beds and containers. The soft, fuzzy-looking flowers range from shades of blue, purple, pink, to white and will attract butterflies all summer. Provide plants with a sunny areas and average soil that does not dry out.

For more information on the growing and care of Ageratum, click Growing Guide.




The size of the plants we ship has been selected to reduce the shock of transplanting. For some, this means a large, bareroot crown. Others cannot travel bareroot or transplant best if grown in containers. We ship these perennials and annuals in 1 pint pots, except as noted. We must point out that many perennials will not bloom the first year after planting, but will the following year, amply rewarding your patience. We ship bulbs as dormant, bare bulbs, sometimes with some wood shavings or moss. Shrubs, Roses, vines, and other woody plants may be shipped bareroot or in pots. The size of the pot is noted in the quick facts for each item.


We ship our bulbs and plants at the right time for planting in your area, except as noted, with orders dispatched on a first-come, first-served basis by climate zone. Estimated dates for shipping are indicated in the Shipping Details box for each item. Please refer to the Shipping Details box to determine the earliest shipping time. Unless you specify otherwise, fertilizers, tools, and other non-plant items are shipped with your plants or bulbs. Please supply a street address for delivery. Kindly contact us with two weeks notice, if you'll be away at expected time of delivery.


We guarantee to ship plants that are in prime condition for growing. If your order is damaged or fails to meet your expectations, we will cheerfully replace or refund it. Please contact our Customer Service Department at 1-800-503-9624 or email us at [email protected]. Please include your order number or customer number when contacting us.



Average Customer Rating: (2 Reviews) Write a Review

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Outstanding annual

Silver Spring, MD gardener from Maryland suburb of Washington, DC

Spindly to start, but shortly takes off and makes beautiful addition to garden, compensating for flowerless periods for other annuals and perennials. At 18-24 inches, it makes a great cut flower, giving height to bouquets for indoor use.

11 of 11 people found this review helpful. Do you? yes no  Certified buyer

I order this plant every year!!

suesue from Saint Louis, MO

A great looking flower in all phases of bloom...even the buds are unique! I can cut for vases all season long and still have plenty of blooms in my flower bed. No downside to this plant at all.

10 of 10 people found this review helpful. Do you? yes no

Growing guide

Growing guide
Print Grow Guide

Latin Name Pronunciation: aj-er-ay'tum    

Floss flower will bloom continuously from June until fall. They have soft, fuzzy-looking flowers in clusters on compact, mounding plants. Their sturdy stems stay erect even through wind and rain. Ageratum grows to a height of 10–12″.

Grow Ageratum in full sun and average soil with even moisture, 6–10″ apart.  Use good potting soil if planted in pots, fertilizing every 2 weeks with a well-balanced fertilizer. Occasional deadheading will improve performance. Floss flower is beautiful in both garden beds and containers, and makes a good cut flower.

For information on planting and care of annuals, click here.

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