King Sago Palm Tree Seeds Grow a living fossil! Very popular landscaping plants. Not a palm tree, but actually a cycad; one of the oldest species of plants that still exist. First appearing 350 to 250 million years ago, cycads were around before flowering plants. Can be used to grow either standard-size or bonsai plants. Seeds have been washed and float tested. "NATURAL" seeds must be cleaned before planting; "CLEANED" seeds are ready to plant. Seed Cleaning, Germination, and Care Information included.