Irish ivy (Hedera hibernica) in a large climbing form develops as a vigorous evergreen vine with thick, woody stems that ascend vertical surfaces through dense networks of aerial rootlets. The leaves are broad, lobed, and leathery, arranged alternately along the stems and forming a heavy, continuous canopy. Compared to related species, Hedera hibernica typically produces larger leaves and more robust growth.

Native to western Europe, particularly Ireland and coastal regions, the species thrives in shaded forests, cliffs, and exposed maritime environments. A notable biological trait is its tolerance to wind, salt, and varied soil conditions. In this large climbing form, the plant emphasizes strong vertical expansion and extensive surface coverage, reflecting its capacity to dominate walls, trees, and other structures while maintaining dense evergreen foliage throughout the year.