Cool Gold piggyback plant is a native of the cool forests of western north America. It takes its name from the plantlets that grow from on top of more mature leaves and appear to be piggybacking on them. Cool Green has bright yellowish-green heart-shaped leaves that are covered in tiny hairs. The plant grows to form a mound about eight inches high but extends when each plantlet puts roots down. Eventually it can form a bright, effective and attractive ground cover in a cool shaded area. This plant is not reliably hardy in Chicago but can be easily overwintered in a pot placed in a location with indirect light.