Tephrocactus geometricus

Tephrocactus geometricus becomes more and more popular in collections, as seeds from Loro Huasi area plants becoming more available and growers figure the 'trickery' of raising these plants from seed.
Seed growing is actually fairly straightforward. To achieve high germination large seed needs to be tempered around micropylar area, and seedlings should not be exposed to high humidity of closed container.