0.4g (approx. 2000 seeds). (Ageratum houstonianum) Perennial flowering plant, which blooms already in the first year. Grow as 20-40 cm (7-15 in.) high shrubs. Fluffy, white inflorescences which covers during flowering the whole plant. Grows well in open, sunny places but is resistant to light shade. Use for flower beds, borders, terraces and as a pot plant.