Those Mammillaria huitzilopochtli ssp. niduliformis are beautiful! How old are they?

Any special treatment for; Maihueniopsis mandragora Pterocactus araucanus Pterocactus megliolii Puna bonnieae Toumeya papyrancantha [/i] ? I've just sown some Pterocactus seeds from Elisabeth & Norbert Sarnes (P. australis & P. fischeri). I sterilized the seeds with a hydrogen peroxide solu...

What is image # R0000512? To be honest, I'm not sure. At first I thought it was a species of Cotyledon or Pachyphytum, because he had a lot of those for sale. At closer inspection and with the aid of Plantnet, I'm guessing it to be a cristate form of Echeveria setosa or pulvinata. I'm attaching som...

Thank you for elaborating on the topic. It helps to know why genera/species are being renamed/recategorized. I'll bookmark the website you mentioned. Seems interesting.

Awesome!! Is in the middle of R0000487.jpg Gymnocalycium spegazzini? Correct. I don't know how old it is. I've only seen younger specimens. I bought a small one at ELK 2023, but gave it away because I promised a plant to a colleague. I noticed yesterday I sowed G. cardenasianum previous spring, whi...

You're reffering to R0000492.jpg? That is indeed E. schoenlandii. I have a specimen which I got from a veteran grower here in Antwerp. Not nearly as impressive as the one in the photo. They're quite slow growing, but it's nice to watch the new growth turn into these woody spikes.

I just read a short scientific journal on germinating Turbinicarpus and apparently T. lophophoroides and pseudopectinatus have a better germination rate when the seeds are +1 year old. All other Turbinicarpus do well when the seeds are fresh. I sowed T. pseudopectinatus and T. lophophoroides (fresh...

Same here. I buy small batches of seeds (usually 30 seeds/species, or less if the seed is very expensive). If seed is fresh and germinates well (which often isn't the case) out of 30 seeds I will manage to grow up to 5 "premium" specimens of which I keep 2-3 for collection. The rest is us...

Thanks.

Here are some pictures I took of the private collection of Miel Decoster (Decoster Cactussen, Veurne, Belgium). I took these last summer. Veurne is located in West-Flanders, Belgium close to De Panne. Observing his greenhouse, I imagine it was quite the enterprise at a certain point. At the moment h...

I try to follow a lot of these Zoom talks and think (besides this) BCSS does a great job. Were these also held before the pandemic? Regarding the lecture of Rob Stevenson, I must say it's confusing. According to Llifle, Turbinicarpus pseudomacrochele is the accepted scientific name, but the Internat...

If the cactus is hibernating, a systemic isn't as effective as it could be. Where are you located? Is your cactus in hibernation or is actively growing? What species is the cactus? If it is (severely) weakened by a mealybug infestation, I'm not sure the hot bath method is a good idea. I would unpot ...