I tried to create crested Obregonia denegrii and grafted 24 seedlings.
It is told the boosting growing speed by grafting is possible to make crested one.
Unfortunately it was not happened at all.
The photo is one of them, degrafted 3 years old.
The germination rate of Pelecyphora aseliformis is quite good.
Own-root seedlings grow with very thin body by unknown reason in here.
I normally graft them and degraft later to get a thick body.
The photo is a degrafted and rooted one.
The photo is a 2nd filial Astrophytum hybrid, hakuran-super (coahuilense x super kabuto).
Although the 1st filial has a good body size, this one is quite small, just 5 cm in diameter.
The hybridization must be affected on the body size.