"The Ageratum Artist Purple , 'Ageratum hybrid', has beautiful purple blooms. This Proven Winner plant is able to renew itself continuously throughout the season by over-growing old blooms with fresh colorful new blooms. It is also exceptionally heat tolerant. They produce radiant clusters of fuzzy flowers, early and on even compact plants. They flower May through October and are a low maintainence plant. Ageratum are great for borders, containers, and rock gardens.For zones 9-11, this plant can also be a perennial."