Helianthus × laetiflorus, commonly known as the cheerful sunflower or perennial sunflower, is a perennial herb that is likely a natural hybrid between Helianthus tuberosus (Jerusalem artichoke) and Helianthus pauciflorus (stiff sunflower). It is native to prairies, meadows, and open areas across central and eastern North America, including Canada and the United States. This sun-loving plant typically reaches a height of 3 to 6 feet (0.9 to 1.8 meters) and spreads 2 to 3 feet (0.6 to 0.9 meters) wide. It has a clumping form with sturdy, green stems and alternate, simple leaves. From late summer to early fall, it produces vibrant yellow flowers with dark centers that are highly attractive to pollinators.

The cheerful sunflower is valued for its bright, showy flowers that bring a splash of late-season color to the garden. It is a low-maintenance plant that is often used in naturalistic plantings, borders, and as a cut flower. It thrives in full sun and prefers well-drained soil but is adaptable to various soil types. While it is drought-tolerant once established, regular watering during prolonged dry periods will promote optimal growth. It can spread by rhizomes, so it may need to be managed to prevent it from becoming too aggressive in a garden setting.CC BY-SA 4.0