Mexican ageratum

Mexican ageratum

Ageratum houstonianum (Asteraceae)

Common Name:

Mexican ageratum

Scientific Name:

Ageratum houstonianum (Asteraceae)

Alternative common names:

Garden ageratum; Mexikaanse ageratum; tuin ageratum (Afrikaans)


Green, purplish or reddish stems 30cm-1m high. It has bright green, soft, hairy, slightly aromatic leaves and fluffy mauve, blue, pinkish and white flowers appear all year around.

Additional Information

Where does this species come from?


What is its invasive status in South Africa?

Existing legislation: CARA 2002 - Category NEMBA - Category 1b

Where in South Africa is it a problem?

Eastern Cape, Kwa-Zulu Natal, Limpopo and Mpumalanga Provinces.

How does it spread?

Mainly through seed dispersal.

Why is it a problem?

Competes with and has the potential to replace indigenous species.

What does it look like?

General description: This annual herb has green, purplish or reddish stems 30cm-1m high with slightly aromatic leaves
Leaves: Bright green, soft, hairy leaves.
Flowers: Mauve, blue, pinkish and white fluffy flower-heads.
Fruit/seeds: Brown one-seeded fruit.

Does the plant have any uses?

Ornamental plant.

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