Wikipedia Article About Brusseles Sprouts on Wikipedia The Brussels sprout (Brassica oleracea Gemmifera Group) is a cultivar group of Wild Cabbage cultivated for its small (typically 2.5-4 cm diameter) leafy heads, which resemble miniature cabbages. Brussels sprouts were first cultivated in Belgium, and are therefore named after its capital, Brussels. Brussels sprouts are commonly misspelled as "Brussel sprouts".