This annual forms a dense upright rounded habit with many branchlets. The oval leaves are dark green and the flowers are white to blue appearing in terminal fluffy heads appearing from early spring to autumn.

Hardiness zones 9 to 12

Ageratum houstonianum is naturally found from Central and South America to the West Indies growing in woodlands. It prefers a well drained moderately fertile moist to dry  light soil with a pH range from 5.5 to 7.5 and grows in an open sunny position and is light frost and drought tolerant.

Floss Flower Is grown for its flowers and is planted in small or cottage gardens along borders or used in bedding displays in large gardens or parks. It is suitable for coastal or inland regions establishing in one season and the flowers are cut and used in floral arrangements. ID 186

Note:
Cut flowers should have long stems and should be scalded in hot water for 15 seconds before arranging in fresh water. 

Ageratum (a-GE-ra-tum) houstonianum (hew-stõn-ee-AH-num)

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