:-k Incredible. Considering all the precautions you have taken, I don't understand how it's possible for mold to proliferate to such extent in such short time. Have you sterilized the pots/tray/dome? You can try spraying with more fungicide, although I don't have any experience in using those. If se...

T. boedekerianus and T. hoferi:

This could be M. haageana, but I'm not certain.

Mammillaria crucigera subs. tlalocii.

Thanks for the answer. I think subterraneus and booleanus are synonyms; accepted name (at least in Llifle Database) is Turbinicarpus mandragora ssp. booleanus.

Nice pictures
I guess that drooping Turbinicarpus in the first picture is T. booleanus. I'm curious if the large one with brown epidermis in the last picture is T. bonatzii? It looks pretty old (I'd guess at least 20 years).
Best regards,
Nino

I think the last one is Cumulopuntia (Maihueniopsis), possibly C. boliviana (dactylifera).

MikeInOz wrote: ↑Sat Mar 30, 2024 11:24 pm A tragedy!

Indeed. One of the prettiest P. aselliformis that I've ever seen in cultivation, especially considering where you have grown it.

Aiko wrote: ↑Tue Mar 26, 2024 2:37 pm Just sow! You will otherwise regret it when you are 55 and think "oh men, I should have sown some when I was ten years younger".

I agree wholeheartedly! In my opinion it's never too late to sow. One can enjoy watching the tiny seedling grow just as much as majestic old specimens.

Some more T. schmiedickeanus (both from locations in Miquihana, Tamaulipas) are opening flowers today:

Bottom picture is of Echinocereus russanthus? I like that colour a lot.

I'm guessing a mix of pumice, scoria, decomposed granite, and akadama would be in order? Maybe pumice, scoria, and akadama in the mix with DG top dressing? I have no experience with DG (it's not available in my area), but I read that people use it in mixtures with good results (e.g. Steve Johnson o...

@ Lolavy: High 80s (measured in Fahrenheits, not Celsius :D ) are not too high temperatures for any cactus species, even Copiapoa, assuming that you are talking about daytime temperatures. For germination success of most species very important thing is difference between daytime and nighttime temps....

I had terrible results with organic substrates for sowing. In almost all cases I had detrimental fungal infection sooner or later in the seedling pots. Probably I made a mistake by sterilizing substrate before sowing and therefore killing beneficial microorganisms. Anyway, for a long time now I've b...