floss flowers purple bloom in garden in sunlight

ageratum annual are aster asteraceae autumnal beautiful bloom bluemink blueweed botanical bush cluster clusters color colors colour colours corymbs dense dwarf floss flower flowerheads flowering flowers fluffhaired fluffy foot garden grow growing growth herb herbaceous houstonianum known lavender mexican ornamental outside paintbrush plant purple purplishblue pussy pussyfoot ray showy shrub sunlight sunny texture threadlike violet