Flowers can be either self- or cross-pollinated for viable seed production. When pollen is mature the anther surface changes from smooth to rough, which is the result of maturation of the pollen grains. Since the pollen grains tend to stick to the anther, the whole stamen can be removed with a pair of tweezers and then rubbed on the pistil of a flower. Seeds will mature about 2 months later.
If seeds are to be stored they should be dried at room temperature for about one week and then stored in a refrigerator in sealed containers.
Darlingtonia seed must be stratified for at least 2 months for germination to occur. After cold treatment, sow the seed thinly on the medium surface, followed by a dusting of fungicide. Keep seeds damp and in strong light at a temperature of 70-85°F (21-29°C) until the seed germinates and produces 2-4 leaves. Then maintain temperature at about 70°F (21 °C). Seedling plants do not transplant very easily. Best results are obtained by transplanting them in the spring just before active growth resumes.
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