The places in which mushrooms can be grown may be roughly grouped as follows:—1. In the mushroom-house proper. 2. In sheds, cellars, out-houses, stables, railway-arches, &c. 3. In deep caves, like those near Paris, described further on. 4. In the open air, in gardens or fields, on prepared beds. 5. In gardens, among various crops, without any preparation beyond inserting the spawn. 6. In pastures where the mushroom is not already established.

To these I might add another group, illustrated by the case of a Belgian cook who grew a dish of mushrooms in a pair of old wooden shoes; but practically we can treat of nearly every possible mode of growing the mushroom under the above headings.