Collect seed by harvesting the flowers with a small length of stem and leaves when the ray florets (petals) start to turn brown. Spread them out on a cardboard tray and allow to dry completely. Rub the flowerheads and winnow out the fruits. In March or April sow these smoke-treated fruits containing the seed in trays of a finely sieved mix by volume of 10 parts sand, 4 parts loam soil and 8 parts well rotted pine bark. Germination takes place in about 6 weeks. When large enough pot into bags containing a mix by volume of 10 parts river sand, 6 parts loam soil and 15 parts well rotted compost. Seed trays and bags should remain constantly moist to reproduce the wet nature of the plant's natural habitat.