The soil in which plants are placed should be considered carefully. Sandy soils which have ample drainage, and clayey soils, which naturally retain water, require distinctly different treatment. It is invariably necessary in clayey soils, especially with larger trees, to provide artificial drainage. In sandy soils, on the other hand, an extra supply of water must be added, especially when stock is transplanted during the latter part of the spring season or in the warmer climates. A plant should not be placed in a "pocket," excavated in shale or clay, which will afford little or no drainage; and it is of course better not to plant on a small mound which will lose moisture rapidly during the dry season. The common practice of "hilling" earth around the stem of the plant, which sheds water away from the roots, is to be discouraged. A shallow, basin-shaped depression should be left around the stem. This will hold the water until it soaks down to the roots. But suitable allowance must be made for later settling of the loosened earth.