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A picture of a Floss Flower

Floss Flower

Ageratum houstonianum

Also known as

Mexican Paintbrush, Bluemink, Blueweed, Pussy Foot

Ageratum houstonianum (in a flowerbed) 01 by Kor!An (Корзун Андрей) (CC BY-SA 4.0)

Full Sun
Moderate care
Moderate watering


RHS hardiness


Minimum temperature

Expected size








1 years to reach maturity


  • spring
  • summer
  • autumn
  • winter

More images of Floss Flower

A close up of some purple Ageratum houstonianum flowers and green folaige
A close up of some fluffy purple flowers on a Ageratum houstonianum plant
Some Ageratum houstonianum growing in a flowerbed
A close up of some purple Ageratum houstonianum flowers
Some Ageratum houstonianum with green leaves and purple flowers

Floss Flower Overview

Ageratum houstonianum is a mound-forming, compact, bushy annual plant from the Asteraceae family. It produces downy, oval leaves and fluffy pale lilac-purple flowers. These appear from midsummer until the first frosts. Mulitple cultivars have been developed from this species, with a range of flower colours including blue, pink, purple, red and white. Attractive to bees and butterflies.

Common problems with Floss Flower

How to propagate Floss Flower


From seed sown in early spring at 16-18°C. Can also be sown in autumn and overwintered at 10°C.

Special features of Floss Flower

Attracts butterflies

Attracts bees

Attracts useful insects

Attractive flowers

Other uses of Floss Flower

Cutting bed, edging, border or hanging basket.

Deer Resistant Plants

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