Tag: pseudolithos

Pseudolithos cubiformis, 3 years + 4 months

I think I worked out why it looked like my Pseudolithos cubiformis has done nothing for several months. I thought it was dormant, but when I looked closely at the corners, I noticed three little nubs, one on three of the four corners. It’s really hard to tell, so I added a closeup.

Pseudolithos cubiformis usually develop flower buds on the corners near the base of the plant. If the nubs are what I think they are.. let’s just say it’s going to be the highlight of my year and the best thing that’s happened on this blog so far, at least in my opinion. My seed grown Pseudolithos is my number one favorite plant of all time.

Pseudolithos cubiformis, 3 years

My beautiful Pseudolithos cubiformis is now 3 years old! This is the only surviving plant out of the 5 seeds I planted 3 years ago. It’s the most challenging plant I’ve ever grown too. Water too much and it rots. Water too little and it rots as well. Too cold? Rot. Treat it just right, with the perfect amount of water in a controlled environment with perfect lighting, humidity and air flow? Rot.

This one survived in my care for so long and I have no idea why. I’m going to be absolutely devastated when it eventually melts.

Pseudolithos cubiformis, 2 years + 9 months

A very square Pseudolithos enjoying the sun.

I check on him every day, worrying about every single change in appearance. Growing these is such a nerve-wracking experience. I’ll make sure to post a pic of the plant when/if it does die in my care. This has been such a success so far and I won’t let it be forgotten like my other unsuccessful experiments.

This Pseudolithos is now exactly 5 cm wide, measured from one corner to the opposite. I water approx. once every 2 weeks, but hold back on the fertilizer. The little bumps on top of the plant are turning light green and grow much faster than the rest of the plant. It is cloudy 6-7 days a week, so some of my plants, including the Pseudolithos, are a tiny bit etiolated.

Growing Pseudolithos cubiformis from seeds

I made a little care/germination guide, now that I know what I’m doing. I hope this helps.

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.

Pseudolithos care:
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.