More Images BETULA NIGRA, River Birch-Clump Hardiness Zone: 4 Prices by Size: 5 to 6 ft., W.B. - $15.00 6 to 8 ft., W.B. - $20.00 8 to 10ft., W.B. - $35.00 10 to 12 ft., W.B. - $60.00 12 to 14 ft. , W.B. - $75.00 14 to 16 ft. , 2" Stem, W.B. - $90.00 [Your browser doesn't support IFrames. Click here to find the USDA hardiness zone for your zipcode.]