The distichous leaves of Agapanthus campanulatus are narrowly strap-shaped and keeled, narrowing to stem-like, purplish bases with tips rounded. Leaf colour is green to greyish green, the blades firm and their margins entire. Leaf dimensions are 15 cm to 50 cm long by 1 cm to 2,5 cm wide (Manning, 2009; Leistner, (Ed.), 2000; Pooley, 1998; iNaturalist).