Crofton weed

Crofton weed - Ageratina adenophora

Common name

Crofton weed

Scientific name

Ageratina adenophora

Weed classification

W3 – must be prevented from spreading; numbers must be reduced

Country of origin

Central America

Habit

erect branched perennial herb to 2m

Habitat

disturbed moist sites

Leaves

soft, triangular, toothed

Stems

brittle, reddish brown

Flowers

very small white flowers in floral head 6mm diam., September

Fruit/seeds

tiny seeds late spring/summer

Dispersal

wind and water

Reproduction

germinates readily from seed

Treatment

hand dig; spray glyphosate 1:100 plus LI700 surfactant 5ml/L

Other noxious weeds

Environmental weeds

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