Hi Peggy, I'm new to growing these. I have both of these and only acquired them about a year ago. They were purchased separately and I have kept them separate. That's not to say that they can't be grown together. I'm not sure about that part. I'm just saying that mine are separate.

One of my Pleiospilos is getting new growth so I'm not watering it. One of my lithos is flowering so I am watering. If they were both in the same pot, it might be difficult to treat each as they require. I hope that helps.

If I may make a suggestion...? Well, a couple. Hopefully your pot has drain holes. Your plants are too low in the pot. Add more growing medium. Your growing medium looks way too organic. My Pleiospilos are in cactus & succulent mix with pumice added, about 50/50. My Lithops are in pure pumice.

Like I said, though, I am still fairly new to these. I'm sure others with more experience will chime in. Good luck and happy growing.

Tyler

Tyler gave a lot of good info, now here's the short answer: Yes, they can go together.

Thanks your such a detailed answer Tyler! I have been planning on moving them into a concoction with a higher mix of pumice/rock, but wasn't sure if it made a difference to wait until I start to water or not... But because I should move them higher in the pot I suppose it wouldn't hurt to do it sooner than later. And yes, I drilled 4 holes at the bottom of this pot :)

Mesembs, I have a follow up question for you then :) I assumed it wouldn't be an issue, but I did a lot of reading trying to figure it out so now I'm not so sure... How do I deal with the case where one is flowering and wanting to be watered but the other one isn't? I assumed because they're from an area where they get minimal rain this wouldn't be an issue, but then realized I haven't had them for a whole year so I don't know if they're actually on the same cycle or not.

Thanks so much for your help! I've decided to separate them to see if I can get the P. Nelli to flower.

Hi Peggy. Not so sure glass (drainage holes?) is the best type of container for these. Mine are all in terra cotta. Assists in evaporation so that the roots don’t stay wet & rot. Glass impedes the evaporation process & holds moisture.

Tyler

I've drilled holes on the bottom of these glass cups. I'll have to go look for terracotta pots I suppose!

I'm impressed that you drilled through glass! In my climate, terracotta is too drying for a lot of plants and I always prefer glazed ceramic, although that's not the same for you. If your mix is fast draining, you should be ok in those glasses because they are so small. I would leave them for now and let the roots recover. Ideally, they do want to spread their roots out some more and when you see evidence of that against the sides of the glass, you can get something larger in terracotta

Peggy, I like the way you have them displayed with real rocks. Can we get a side view?

Tyler