Cold temperate Pinguicula as like Pinguicula vulgaris, Pinguicula macroceras, Pinguicula grandiflora and others can be found through out the northern hemisphere. Pinguicula vulgaris is very widespread and grows in North America, Europe and Asia. At the beginning of autumn they form winter buds and so the plants can survive snow and ice.

Most of the cold temperate butterworts prefer acid soils. So you can use a mixture of two parts peat, one part silica sand, one part perlite and one part vermiculite.

Cold temperate Pinguicula seeds need temperatures from -10°C to 5°C (14°F to 40°F) for 8 to 12 weeks to germinate. CP-growers in regions with cold winters with snow and ice can sow the seed outside in pots on there prefered soil mixture at the beginning of autumn. In spring place them in a bright sunny location. Normally the seed starts to germinate between March and May. The soil must be allways very damp!

For seeds to be started indoors or in a greenhouse, the seed should be stratified in the refrigerator. The method that uses the least space in the refrigerator is to place the seeds in a small plastic bag with a few large pinches of damp peat. Keep the seed in coldest part of the refrigerator for 8 to 12 weeks.

After the first winter of growing, the plants should be seperated when growing to near to each other. Attention: the plant needs cold winter temperatures to survive!