I think they are best sown fresh Lynn, in nature they would drop to the ground with the dying stems or get carried by winds or rain and germinate quite soon if conditions were correct.
It's best to keep them where they don't get frosted. Use a loose, sandy loam mixed with leaf mould if you can get any or leafy compost and press them into the surface. You could cover them lightly with leaf mould but I would say they need to be kept only slightly moist and very well drained. When the roots make they will seek moisture lower down, these grow amongst rocks on hilly slopes in South Africa.
http://www.plantzafrica.com/pl...
