Floss flower is a frost-tender annual that blooms from late spring to frost. The Flowers are fluffy and look like clusters of little balls at the ends of the flower stems. Size depends on variety, and range from 4 to 30 inches tall. Flower colors are typically in the pastel shades, and include various shades of blue, pink, red, white, and bicolor. Leaves are typically rounded, hairy, slightly quilted, and soft green. Taller varieties make good cut flowers.
Ageratum prefer rich, well-amended soil that receives consistent watering. Though full sun, in our hot summers they will do well with some mid-day or late-day shade. Overhead watering may cause powdery mildew. Well suited to containers.