More Images QUERCUS PHELLOS, Willow Oak Hardiness Zone: 5 Prices by Size: 1 1/2 in. CaL, W.B - $40.00 1 3/4 in. Cal", .W.B - $65.00 2 in. CaL, W.B - $80.00 2 1/2 in. CaL, W.B, - $90.00 3 in. CaL, W.B - $120.00 4 in. CaL, W.B - $175.00 [Your browser doesn't support IFrames. Click here to find the USDA hardiness zone for your zipcode.]