Propagation
Sow fresh seeds during autumn and place in a cold frame to germinate.  Germination may take up to two years and seedlings reach flowering size in five to seven years.  

Division of the rhizome with at least one growing point after flowering. The plants are slow to re-establish.

Botanic information
Leaf: The thin textured dark green sessile leaves are ovate to rhomboid with an obtuse to acuminate apex. They are arranged in a whorl of three terminally on the stems. 

Flower: The sessile funnelform flowers have 3-green lanceolate sepals and 3-spreading petals that are pure white with pinkish veins. The centre consists of 6-yellow stamens and the terminal flowers appear solitary during spring and are accompanied with bracts.

Fruit: The 3-celled berry contains winged seeds that are viable but the plant is commonly reproduced vegetatively to maintain true to type.

Trillium culture
Plant rhizomes from autumn to spring at a depth of 80 to 100 mm (4in) deep in groups and space 300 mm (1ft) apart. They tolerate most well drained cool moist soils with ample humus and with the addition of rotted cow manure incorporated into the soil.  

During summer, keep the soil continuously moist, particularly during hot weather and grow the plants in a semi-shaded, wind protected position