Hosta Mama Mia will form a medium-sized mound, reaching 40cm-45cm in height with a spread of up to 75cm at maturity. It features a compact, dome-shaped mound of broad, heart-shaped, wavy-margined leaves with prominent veins. The leaves are slightly corrugated and have a glossy dark green appearance with golden-yellow margins that fade to cream with age. In the summer, scapes up to 70cm tall bear delicate pale lavender flowers.