CERCIS RENIFORMIS, Oklahoma Redbud Hardiness Zone: 6 Prices by Size: 6 to 7 ft. , W.B. - $35.00 8 to 10 ft. , W.B. - $45.00 1 1/2 in. Cal., W.B....... - $55.00 2 in. Cal. , W.B.. - $100.00 [Your browser doesn't support IFrames. Click here to find the USDA hardiness zone for your zipcode.]