Sweet Tea Heucherella, also known as Foamy Bells, making it an attractive choice for any garden. This perennial plant is hardy in USDA Hardiness Zones 4 to 9 and can grow up to 20 inches in height. Sweet Tea Heucherella thrives in part to full shade and adds an instant pop of color to any garden with its striking shade of red. Choose this plant to add unique hues to your garden and enjoy its longevity as a beautiful perennial. 3.5 inch pot. 3 plants per order.