Plant Family / Ageratum - Floss Flowers
An old favorite with its fluffy round clusters, Ageratum (Floss Flower) is one of the few annuals to tolerate light shade. A nonstop bloomer from summer to fall (Ageratum means 'long-lived' in Greek), it grows easily in shapely mounds ranging from 6-24 in. tall (15-60 cm) and mixes extraordinarily well with all other annuals and perennials. Its colors range from blue, purple, lavender to pink, red, white and bicolor, providing a nice contrast with the rest of the bedding plants. It is deer, rabbit resistant and attracts butterflies.
One of the tallest, Ageratum houstonianum 'Blue Horizon' (Floss Flower) features fluffy round clusters of lavender to purplish-blue flowers resembling asters.