Not for Mammillaria, but I had good results with Haworthia seeds on kitchen roll (my reasoning was that some seeds germinate rather quickly, while some were still germinating a month later, so I wanted to keep them in high humidity). For me the only caveat would be to carefully cut out pieces of ti...

I have some cryptocarpic Mammillaria species, -bertholdii -roczekii -theresae -haudeana -goldii -luethyi In the previous years i used the technic, opening the seeds by a needle. But it has the risk of damaging the embryo and takes lots of time to open the seeds one by one, and Mammillaria seeds are ...

It seems some species dont like being disturbed at early stage even if they are in the same genus. I live in Eskişehir, it is in the middle of the Türkiye, we have dry and hot summers and really cold winters. I am sure you are right about some plants being more sensitive to root disturbance than ot...

Yes, Fatich, for most cactus species, although it might be better to wait a bit longer for really slow things. But certainly when the are as big as a match head, I'd be potting them out. I also use bigger seed pots than you, so the seedlings won't be so crowded. But there are many different ways of...

They look very healthy.
I have some plants around 6 years old from seeds, never have flowered.
I have also a grafted one, it flowers every year.

ralphrmartin wrote: ↑Mon Jan 02, 2023 8:27 pm I repot my seedlings at a much smaller size - now they are this big it will be difficult to separate them without damage. Everything sown in March is repotted by the end of July - into individual pots!

Thanks Ralph i will consider repotting earlier. Do you use same method for all species?

I have these Mammillaria napina seedlings that are around 18 months old. They are in 5x5x5 cm square pot and would like to put them in 7x7 cm square pot. At this stage is it okey to repot them? This is my first time growing napina from seeds. First two photos belong to Mammillaria coahuilensis, they...

Jan Novak updated the seedlist
https://kaktusy.webzdarma.cz/nabidkaobjednavka/

Thank you all for your kind comments!

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