'Blue Mammoth’ is a giant, blue-leaved hosta that grows in a mound to 34" tall and to 48" wide. It features thick, heavily-corrugated, wide-oval, powder blue-green leaves (to 16" by 12") with some undulations, cuspidate tips and cordate lobes. Best blue foliage color occurs in light shade with tolerance for some brief morning sun. Funnel-shaped, white to pale lavender flowers bloom in mid-summer atop naked, upright, gray-green scapes rising to 48" tall. This is one of the largest of the blue-leaved hostas.
