Fearing Burr, The Field and Garden Vegetables of America
“ Soil, Propagation, and Culture.—The best soil for the Cardoon is a light and deep but not over-rich loam. It is raised from seed; which, as the plant is used in the first year of its growth and is liable to be injured by the winter, should be sown annually, although the Cardoon is really a perennial. It succeeds best when sown where the plants are to remain; for, if removed, the plants recover slowly, are more liable to run to seed, and, besides, seldom attain the size of those that have not been transplanted. ”
