I have had great success with Satsuma oranges in zones 8 and 9. They produce a mild, sweet-flavored, easy to peel orange and very few seeds. They make excellent container trees and will generally not reach more than 6 feet tall. They require full sun for best production. They can tolerate temps down to about 27 degrees Fahrenheit without damage and can easily be protected below that by moving them indoors or with heat lamps, tarps and blankets.