This section is from the book "The Gardener V1", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
This is a very useful plant for the dinner-table, and one that gives very little trouble where there is a stove. About the beginning of March I generally look over the bulbs, which are then at rest, turn them out of their pots, and repot them in the following soil - turfy loam, leaf-mould, and very old cow-dung in equal parts, with a sprinkling of silver-sand. I have generally found the Caladium to last longer in a growing state, and also to make much larger leaves, if the bulbs are put into small pots first and then shifted to larger ones as soon as they have filled their pots with roots. The size of the pots we use on the table here are 4½ inch - accordingly the bulbs are put first into 3-inch pots, and when full of roots shifted into 4½-inch pots. When potting, it is a good plan to put a large bulb in the centre of the pot, with three or four smaller ones round it; this will bring the tallest and best leaves in the centre of the plant. As the plants are not required here till late in the summer, I only give enough water after potting to settle the soil about the bulbs; they are then put on a shelf in the stove until they start into growth, when water is given whenever it is required, until their beauty is past, when they may be returned to the shelf to gradually dry off.