The clusters of tiny star-shaped flowers are laden with nectar, and butterflies of all sizes love to visit them. Though pentas are not native (they come from Africa and Arabia), I don’t know of any place in the U.S. where they’re considered invasive, since the cultivated versions sold here rarely re-seed themselves.

Do pentas spread out?

Size. In their native habitats of Yemen and East Africa, penta flowers will grow as large as 6 feet tall, with an equal spread. Grown in non-native habitats or in containers, penta plants may be as small as 1 or 2 feet tall, with an equal spread. These plants produce clusters of flowers up to 5 inches in diameter.

Do pentas get big?

Growth and Care Most pentas grow about 15 inches wide and 2 to 3 feet tall, so be sure to leave ample space for them to grow if planting in beds.