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A picture of a Floss Flower

Floss Flower

Ageratum spp.

Also known as

Mexican Paintbrush

Ageratum houstoanianum0 by [1] (CC-BY-SA-3.0)

Full Sun
Moderate watering


RHS hardiness


Minimum temperature

Expected size







  • spring
  • summer
  • autumn
  • winter

More images of Floss Flower

A photo of Floss Flower
A photo of Floss Flower
A photo of Floss Flower
A photo of Floss Flower
A photo of Floss Flower

Floss Flower Overview

This genus contains 40-60 species of annual or perennial tropical and warm temperate species. Growing on average 15-30cm tall, they spread and form mounds of oppositely arranged oval to lance-shaped leaves. The flowers are small, rounded, fluffy and range in colour from bright shades of purple to more pastel purples, pinks and white. Ageratums make good annual bedding plants and they are also favoured as edging for borders and a big hit with butterflies!

Common problems with Floss Flower

How to propagate Floss Flower


Propagation is by seeds which are sown outdoors in late spring.

Special features of Floss Flower

Attractive flowers

Attracts butterflies

Attracts bees

Attracts useful insects

Other uses of Floss Flower

Bedding, borders.

Flowers to Sow or Plant Under Cover in March

Sow these seeds and pot up these tubers to get an early start on the year.

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Blue Flowering Summer Plants

Love blue flower and looking for summer inspiration.

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