Place them at the same depth as they were originally grown. A sandy loam type soil is ideal for winter pansies, although they grow in most any soil, providing it is well drained. At planting times add generous amounts of peat moss, leaf mold or compost to the existing soil. Also mix in a small quantity of transplanting or bulb type fertilizer, following application directions on the label of the brand you use. Mix soil dust into the planting soil, to protect the roots from infestations of soil borne insects and diseases.
Slugs are one of the worst enemies of winter pansies.
They can eat the plants right back to ground level if they are not controlled. A regular baiting program is usually necessary to protect the plants. Light monthly applications of an all-purpose liquid fertilizer in spring and early summer are beneficial. If you want to brighten up your garden this winter, consider planting a few of the bright winter pansies.