Agave gentryi is a powerful and visually impressive succulent that adds bold character to gardens and landscapes. It usually develops a sizable, solitary rosette composed of thick, fleshy leaves. These leaves range from deep green to bluish-green and often feature a powdery, glaucous layer that imparts a silvery shine. The leaf edges are lined with notable reddish-brown spines, which are sharp and serve as a key identifying trait of this species.