Plants are very large with upright growth habit. The lower stems are pigmented light red-purple with conspicuous wings and slightly swollen nodes. Leaves are large, dark green and somewhat rugose in appearance. Flowers are large and abundant throughout the season. Buds are green.
Corolla is white and anthers orange.
Tubers have a heavily, and uniformly, russeted skin and white flesh. They have an oblong, slightly flattened shape. Eyes are shallow, moderate in number and well-distributed. Dormancy is medium. Russet Nugget is resistant to most external and internal tuber defects including second growth, growth cracks, hollow heart and blackspot bruise.