This perennial plant has multiple upright purple-reddish branched stems that form a bushy habit. It has bright green triangular leaves and the small white flowers appear in a dense head over the plant during spring. 

Hardiness zones 9 to 12

Ageratina adenophora is naturally found from Central America to Mexico in North America growing in well drained to wet fertile moist light soils in an open sunny position and is frost and drought tender. 

Crofton Weed is a fast growing and invasive plant that is not normally cultivated in domestic gardens. It tends to be a weed that grows in damp gullies snuffing out all other plants seedlings and clogging watercourses. It may be removed by hand with roots or sprayed with dilute glyphosate. ID 807

Ageratina (a-ge-ra-TEE-na)  adenophora (a-den-ō-for-rā)

Asteraceae (ass-ter-AY-see-ee)	
(Compositae)
Sunflower Family