Hawaii's Guinea Grass Spreads Wildfire Risk With 9,000 Seeds and 9-Foot Growth

Guinea grass, originally introduced to Hawaii in the 19th century for grazing purposes, has since become a serious ecological threat across the islands. The invasive perennial can grow up to nine feet tall and produce as many as 9,000 seeds per plant, enabling rapid and widespread proliferation. Its ability to recover quickly after fires makes it a significant contributor to wildfire risk by supplying large amounts of combustible fuel. The species serves as a cautionary example of how imported plants can cause lasting and unintended environmental damage.