According to the Urban Farmer, "Zone 9 has a long growing season with hot summers. Most vegetable varieties will have no problem maturing before your first frost date. With a last frost date of March 1st and first frost date of December 15th. These dates will vary a week or two so it’s important to watch the weather before planting. Annual minimum temperature for zone 9 is 25ºF." I recommend planting turnips in your area between August and October. Keep growing, Marianne Binetti