Pandanus tectorius
"Pandanus tectorius" plants are usually propagated by seed in Hawaii. Soak the keys in cool tap water for 5 days while frequently changing the water. Viable keys will float, so it is important to keep them. In "Growing native Hawaiian plants: a how-to guide for the gardner", Bornhorst says to remove the fleshy layer of the key and then bury the seed half-way in planting soil. It is important to keep the soil most.