Ipomoea batatas `Sweet Caroline Sweetheart Purple` is a compact to moderately-compact cultivar producing many shoots and having dense foliage. This cultivar is distinguishable from other cultivars by its small to medium-sized heart- to spade-shaped dark purple leaves. The plant has a good vigor, but is less vigorous than Ipomoea batatas `Margarita` and `Blackie` and unlike these cultivars, `Sweet Caroline Sweetheart Purple` may be grown in containers with other species. The production of flowers by `Sweet Caroline Sweetheart Purple` is relatively rare even under short day conditions.