(2 Gallon) CORKSCREW WILLOW has an interesting branching system that twists horizontally and forks vertically, giving it a distinctive look. (2 Gallon) CORKSCREW WILLOW has an interesting branching system that twists horizontally and forks vertically, giving it a distinctive look. Height: 20-30 ft. Width 15-30 ft Full sun to partial sun. Fast growth rate. Zones: 4-8 Branches can be used in floral arrangements and wreath making.