Yes, this castor oil can be used on the scalp and hair lengths. Its high ricinoleic acid content gives it strong softening properties that can help tame dryness and add shine. However, it differs from many dedicated hair oils in its singular, dense composition. It lacks the lighter carriers or specific additives (like silicones for slip or fragrance) found in blended formulas. For scalp use, massage a few drops into dry areas before washing. For the lengths, use a pea-sized amount emulsified between your palms and apply only to mid-lengths and ends to avoid greasiness at the roots. Because it is so rich, it's often recommended as an occasional intensive treatment rather than a daily leave-in. If you have a sensitive scalp or specific scalp conditions, a patch test is advisable before broader application.