kale, kail cabbage XIII (cale); cabbage broth XV. north. var. of COLE.
Hence kailyard cabbage-garden (YARD1), familiar since 1895 as an epithet of fiction and its authors (literature of the k., k. school) describing, with much use of the vernacular, common life in Scotland.

kale Scottish name for any type of cabbage; in England it means specifically open‐headed varieties of cabbage with curly leaves, also known as curly kale or borecole. Distinct from sea kale or Swiss chard.

kale / kāl/ • n. a hardy cabbage of a variety that produces erect stems with large leaves and no compact head. See also curly kale.

kale Hardy, crop plant related to the cabbage. It is short-stemmed and has large, bluish-green, curly-edged leaves. It may reach a height of 61cm (24in). Family Brassicaceae; (sub)species Brassica oleracea acephala.