Napier Grass Altitude Guide Napier Grass (Pennisetum purpureum) grows across various altitudes, but it thrives best between sea level and 2,000 meters (6,560 feet) above sea level. ๐ Altitude Considerations for Napier Grass Cultivation: ๐น Below Sea Level to 2,000m:โ Ideal growth conditions in warm tropical and subtropical regions.โ Higher biomass yield due to adequate [โฆ]