This section is from the book "The Gardener's Monthly And Horticulturist V18", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
Many amateurs who have grown chrysanthemums for conservatory decoration are in doubt as to what should be done with them now that they are out of flower; and a word or two on the subject will be of service. They are, it must be said, very accommodating, and may be kept in a properly-constructed pit or under a covering of long litter. As pit-room is not often very abundant in such gardens, and the chrysanthemum, although reputed hardy, is likely to suffer from severe frosts, stand the pots on a layer of coal-ashes at the foot of a wall or other sheltered place, and when there is any appearance of frost cover them with a thick layer of long litter or newly-collected leaves, and place a few boards on the top, especially if leaves are employed, to prevent them blowing about. Here they can remain until all danger from severe frosts is past, and then they can be uncovered. In the early part of the spring turn them out of the pots, knock away all the soil, and select the strongest suckers with a few roots attached to them, and then put them singly in small pots. This will save the trouble of striking the cuttings, and a little time will also be gained.
When established in the small pots they can be shifted on in the same manner as those raised from cuttings.- Gardener's Weekly.