I made a little care/germination guide, now that I know what I’m doing. I hope this helps.
If you’re interested, heres a link to a collection of blog posts about my Pseudolithos seedlings from germination to the latest post.
Pseudolithos from seeds:
Finding P. cubiformis seeds is probably the hardest part. P. migiurtinus and P. eyelensis are easier to find, but it’s still a bit of a challenge. Koehres in Germany and eBay may be your
best bet. Never buy seeds from China.
I was able to germinate all of the 5 seeds I bought. I placed the seeds on top of some moistened diatomaceous earth cat litter (pumice, crushed lava rock or turface is impossible to find here, so I used the next best thing) and used the baggie method to keep everything moist in there. I placed the bags in an eastern window (grow lights work as well) and the seeds germinated one by one over a period of 1 month.
Now, keeping the seedlings alive is a hit and miss. I took my seedlings out of the bag a week after germination and kept them moist for the first couple of weeks. Then i experimented with letting them dry out for a couple of days before watering again. Some seedlings grew very fast and some stalled and died over the first 5 months, so I put it down to luck.
I still use pure diatomaceous earth cat litter as soil for my adult plants. Again, pumice, crushed lava rock or turface would be perfect. Never use peat for these unless you live in an arid climate. It’s much easier to manage watering when you know that the soil dries out quickly instead of staying wet for a week.
In summer I water mine approx. every 2 weeks depending on how much sun they get and how long the soil has been completely dry. In winter I water once every 3 weeks-1 month.
Because I don’t use peat, I add quarter strength indoor plant fertilizer to my water once every 2 months. A small pot with drainage holes is a must.
My plants are in a south-facing window with 7-8 hours of direct/filtered sunlight. Always indoors, even in summer with temps around 20-30 degrees C.
I’ve seen people use fans, thermometers, hygrometers and expensive lighting setups to keep their Pseudolithos under 100% controlled conditions, but I’d say unless you have inadequate lighting in your house, that stuff isn’t necessary.