Have a look here. Experiencing their flagrances is a different story. For that you will have to travel to this place by the British newspaper The Independent described as “Best Garden in Western Cape” (9 January 2010)
Even so called ‘difficult’ ones.
Of the Ariocarpus species it was said to us, four years ago when we acquired them, that it is impossible to grow them under the open sky in South Africa.
But we do. We created an elevated acre with poor sandy, rocky, soil with additional drainage 20 centimeter beneath the surface. And they are still growing; they are even flowering every now and than.