
Bath Cos is an eighteenth-century English variety of Romaine lettuce. The handsome, grayish-blue leaves form a loose Romaine-type head. Seed of Bath Cos is best sowed in very early spring for an early summer harvest, or in late summer for a fall and winter crop. Plant seed directly in rows in fertile, sunny garden soil, and thin seedlings to 8" to make room for the large, loose heads.