When both male and female pampasgrass flower heads grow together, they form viable seeds. In this case, it spreads to new areas, which makes it an invasive plant species. Pampasgrass grows in moist, cool coastal areas. It tolerates a wider range of cool and warm temperatures compared to jubatagrass. Pampasgrass grows in the increased sunlight intensity and drought found at inland sites. It is found in dunes, drainage ditches, roadsides, cut slopes, forestry operations, and disturbed areas.