Sow any time of year. Remove the orange tuft and soak for up to 24 hours. Press seeds into moist sand and seal inside a plastic bag. Place in the dark at 21-24C (70-75F). Germination can take 1-6 months.
Inspect the seeds regularly and pot up any which have started to grow, into a good seed compost. Any which have produced a root only should also be potted up and kept damp until a shoot appears.