MAGNOLIA SOULANGEANA, Saucer Magnolia Hardiness Zone: 4 Prices by Size: 3 ft., W.B. - $20.00 4 ft., W.B. - $30.00 5 ft. , W.B. - $40.00 6 ft., W.B. - $50.00 7 ft., W.B. - $60.00 B ft., W.B. - $70.00 [Your browser doesn't support IFrames. Click here to find the USDA hardiness zone for your zipcode.]