The artichokes should remain in the ground in autumn as long as the
weather permits, and be fed out of the field during that time, and just
before the earth is permanently frost-bound, enough of them should be
dug up to last over winter; and, since frost does not injure them, the
rest should be left in the ground until the following spring. A good way
to keep them in winter, is to place them on the ground in the field in
shallow layers, covering them lightly with the stalks of the artichoke,
or with straw, and then with a little earth. If the rain wets them it
will not injure them. It is advisable always to keep a considerable
quantity of them in the stable or cellar for convenience of feeding. In
the ensuing spring, they are again fed out of the field until it is time
to plow the land, when all the tubers not yet disposed of, are taken up
and kept in the cellar or stable.