This section is from the book "Commercial Gardening Vol4", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
This European biennial (fig. 512) has white spindle-shaped roots which are eaten raw or cooked. The leaves as well as the roots are sometimes used in winter salads. The Rampion prefers a light rich soil and partially shaded situations. It is best raised from seed sown between March and July, in nicely prepared soil, in very shallow drills, as the seeds are very small. The young plants are thinned out 4 or 5 in. apart. The roots will be ready for use from November to April and May. If allowed to remain in the ground they will throw up flower stems about 2 ft. high the following summer. (See Vol. II, p. 16).
Fig. 512. - Rampion (Campanula Rapunculus).