Agave titanota Lions Mane – A medium-sized agave to 2 ft. tall with thick pale, gray white-colored leaves arranged in an irregular rosette. It is an open plant with few leaves, which are 1 to 2 feet long by 5 inches wide near the base and narrower towards their tips. Prominent, white-to-tan teeth develop with maturity. Plant in well-drained soil and irrigate only occasionally. Hardy to at least 25°F.