Previous research established that lower leaf grades were obtained from hairy-leaf varieties than from smooth-leaf cotton (Gossypium hirsutum L.) varieties. However, some studies reported conflicted information that confounded leaf grade with varietal effects. This study evaluated the cleaning efficiency, fiber-seed-attachment force, seed-coat fragment level, and fiber length distribution of smooth and hairy isolines of Deltapine 16 and Stoneville 213 at two planting dates. Results indicated that cleaning efficiency was directly related to the variety. Seed-coat fragments, mots and lint percent were variety related. Plant dates significantly influenced more properties than either leaf hairiness or variety.