This section is from "The Horticulturist, And Journal Of Rural Art And Rural Taste", by P. Barry, A. J. Downing, J. Jay Smith, Peter B. Mead, F. W. Woodward, Henry T. Williams. Also available from Amazon: Horticulturist and Journal of Rural Art and Rural Taste.
A correspondent suggests, or, rather, says, that we are wrong in classing the hollyhocks in our last number as perfectly hardy, because he says that "while young plants will winter perfectly, the second and third winter generally finds them all destroyed." Our reply is: the hollyhock propagates itself from year to year like the Alpine strawberry, or other perennial, by offsets from sides of the main plant, leaving the center or crown plant to die out; and if these offsets are permitted to remain at' tached to the main plant, their exhaustion of the surrounding soil and consequent loss of vitality renders them less capable of enduring severity of temperature, and therefore death. If, however, the young plants or offsets be taken from the parent plant and replanted in good soil, from year to year, they are perfectly hardy, and will endure as much as the young seedling. We will only add, that a safeguard to old plants, whose center crowns have flowered and died, and are now dependent upon the support of the offsets, should have yearly a mulch of leaves or straw applied in autumn around them, which will, to some extent, answer the purpose of renewal by transplanting.
The season of growth is however now about commencing, and we advise those who have old roots of the hollyhock to take them up, and separate and transplant them as early in the season as the ground will admit of being worked.