This working so far. I dug this large sandstone slab up a few years ago. It's more or less 5 1/2 - 6" deep and 18" x 29", so it's not something I move around much. It had natural holes? or depressions and water apparently drains since it disappears faster than evaporation can account for. Either it has cracks I can't see or the sandstone is just absorbent enough to pull in water - maybe both since you can see cracks going to a couple of the depression. Anyway, I decided to try and see if some semp rosettes would grow. They've been there a while and seem firmly in place now. They all came from a semp I bought as 'Purple Beauty', so I don't know why one rosette is green and the others aren't. It makes me want to see if I can chisel into a smaller sandstone and make a container.

Would be interesting to see how it goes...Good Luck Donald!

I like that! Reminds me of my featherock! Will look forward to your photo updates

Very cool! I was going to do the same thing last spring with some larger limestone rocks I had, but I ended up needing them for my bed projects. I still may do this when I have time to go rock hunting again.

Good to know it works!

That's a fine slab of sandstone Donald . Perfect for converting into a semp container or maybe even just drilling 1" holes with a masonry drill and planting semps in them . Good luck with your enterprise !
These two I hollowed out with a small angle grinder and hammer and chisel. They are both granite which is very hard , next time I'll try limestone or sandstone when I find suitable size rocks .

Those are great, Paddy! Granite would be really hard, I would think. Here I have limestone and a lot of sandstone. I might find a chunk of limestone sometime where water hollowed it out naturally, but the limestone here is very hard and very brittle. I'm not sure I'd have enough skill or patience to work with it. The sandstone, on the other hand, is plentiful in varied shapes, sizes and degrees of hardness. There's more hope I'd give it a try there. I think it would make an attractive container for lots of things, but semps might be the ideal plant.

Donald that's really cool!
Paddy love your rock pots, reminds me of something Fred Flintstone would have had

Awesome, Donald! I really like that look!

That is so interesting Donald. Bet Sedum album would also love to grow on that rock.

Wow, Paddy I can't even imagine trying to drill out something that hard. How long did it take you?