Hedera helix has been grown in North American gardens for centuries, and that long familiarity has perhaps made it harder to see clearly. Native to Europe and west into Russia, it is a vigorous, high-climbing evergreen vine capable of reaching 80 feet on a willing host — moving through two distinct growth phases: a juvenile spreading stage with thick lobed leaves and adventitious roots that grip any surface, and an adult shrubby stage that produces small greenish-white flowers in early fall followed by clusters of blue-black berries. In its native range, this cycle is part of a balanced ecosystem. In North American forests, it is not.

Established English ivy is nearly impossible to eradicate once it spreads into woodland, where it smothers the forest floor and climbs old trees, blocking light from native wildflowers and shrubs. For this reason, alternatives are strongly recommended for outdoor planting in most of the eastern United States. As a houseplant, however, the picture changes considerably: grown in hanging baskets, tall planters, or trained as a grafted standard on Fatshedera stock, the smaller-leaved cultivars are handsome and manageable, and the plant presents none of the ecological concerns that come with outdoor establishment.