In addition to its adaptation to the Northeast, it has been grown in southern production areas as a table and chipstock variety. Plants are large, erect or spreading. Leaves are medium in length, broad and open. Leaflets are broadly ovate, large and dark green. Tubers are elliptical to round, medium-thick with a smooth ivory skin.
Specific gravity is medium to low.
Tuber dormancy is short. Sebago is resistant to net necrosis and wart and has moderate resistance to early and late blight, southern bacterial wilt, PVX, PVY, PVA and some resistance to scab. The variety is highly susceptible to blackleg. When grown in the south, the variety's maturity is considered medium-late. Tubers grown under good conditions are attractive but are susceptible to prominent lenticels under wet conditions.