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.
The Garden says, that amongst the numerous plants now in use for the ornamentation of hanging baskets, for draping vases, or for training loosely up conservatory pillars, few surpass the Ivy-Leaved Pelargonium. The green and bronze-leaved varieties are also suitable for use in this way, but the variegated varieties are the most attractive. In addition to their graceful habits of growth, they possess the great advantage of almost entire immunity from the attacks of insects. This is a great desideratum, more especially in the care of plants that are suspended over others; as in this position, rf infested with insects, they quickly communicate them to all plants that grow below them. They are also plants of easy culture, and strike freely in sand and loam in small pots.
Ordinary loam, to which has been added a little well-rotted manure and sand, suits them perfectly. They require little attention beyond stopping, in order to induce them to break sufficiently to afford the proper amount of shoots to give them a well-furnished appearance. An eight or ten inch pot will be found large enough for them, and for large hanging-baskets, two or three plants may be put together, or they may be mixed in this way with other plants, suitable for this description of decoration.
The old plants may be cut back, and induced to break afresh, or young ones may be struck, and the old ones thrown away, when the baskets or vases are refilled.