This attractive and carefree perennial gives weeks of blue ageratum color on tall plants at a time when our hybrid ageratums are in decline. Mistflowers do best in full sun but tolerate a little shade. They get tall on roadsides but can be cut back in the spring and summer and still produce an outstanding show of color for late summer and fall. These plants spread by rhizomes and can multiply quickly in luxuriant soils. In other words, they can become a little invasive.
Tight soils can keep their aggressiveness in check.
Mistflowers look great in areas where they are allowed to spread and naturalize, but I don't mind weeding unwanted plants. Butterflies find them to their liking. They work well with ornamental grasses and for sure yellow and orange plants like lantanas, marigolds and chrysanthemums. I pointed it out to the producer since I had just done a radio program on the flower. This plant is definitely one of the ultimate hummingbird plants.