Toxicity Seiler et al. Merker can bloom 60 days after planting and reseeds itself occasionally. Bogden mentions Capricorn, Cubano, Domira, Ghana, Gold Coast, Merker, Merkeron, Mineiro, Napier, Pungwe, Uganda, and Urukwanu as noteworthy cultivars. Pusa Giant Napier, an Indian cv, is said to be more nutritious, succulent, palatable and responsive to N than Napier Grass. Introduced to South America, Puerto Rico, Philippine Islands, Hawaii and southern United States.
Ecology Requires a rich soil for best growth.
It does not tolerate much frost, so culture is limited to warmest parts of mainland United States and Hawaii. The herbage is killed by frost but soil must be frozen to kill the rhizome. Thriving on poorly drained soils to dry sandy soils, it grows best in rich well-drained soils. In Uganda, napier grasslands are considered the fire subclimax to evergreen forest. It is grown in rows and cultivated for highest yields.