||Edema on Cabbage; Sudden drop in temperatures and high soil moisture will cause leaf cells to rupture causing a wart-like appearance. New growth will not be affected unless conditions repeat.
||frost and winter injury (general)
||Cold stress on cabbage; Sudden drop in temperatures and other stresses will trigger anthocyanin production causing a "purpling" of the outer leaves. Plants will usually grow out of this condition as temperatures moderate.
||Calcium Deficiency in Cabbage; Exhibits characteristic "tip burn" at tips/edges of the leaf. Leaves are deformed and cabbage head will not form if supplemental calcium is not applied. Cupping of leaves is typical.