Primroses have a habit of spontaneously producing odd forms called sports, which are often very appealing. There are various sports of P. vulgaris that expand the range of suitable primroses for woodland gardens. The most desirable form resulting from genetic whim is the so-called hose-in-hose. In the hose-in-hose form the calyx is turned into petals of another flower - so it looks as if one flower is nestling inside another. Dappled cool conditions are best and even heavy soils are acceptable providing they are not waterlogged. Plants are supplied bare-root and are of mature flowering size.