The Mission Olive Tree originated in California circa 1769, where they were first planted by Franciscan priests as they established Missions, hence the name. It's popularity grew due to its growth in California over the years when interest in olives and olive oil increased. The Mission Olive Tree can grow up to 30 feet, with its olives maturing October through November. The Mission Olive tree is cold hardy from 8 - 10 degrees Fahrenheit.