ShadyStump
Imperial Masterpiece
P. Afra can be fun, and jade, but remember they are technically succulents, not a tree. Water them like your aloe plant or they won't grow. There are trailing varieties of p. afraid that will naturally match your cascading image, but these don't lignify (turn woody) as well, so can be harder to train. They also will grow slower in an office environment. I'm experimenting with one of these right now. I could send you some cuttings if you're interested.
Ficus benjamina are as easy as they come for beginners, but their roots won't work well for planting over wood or rocks. Planting it and just using your wood as an accent might look nice. I also have a supply of these is why I bring it up.
Ficus benjamina are as easy as they come for beginners, but their roots won't work well for planting over wood or rocks. Planting it and just using your wood as an accent might look nice. I also have a supply of these is why I bring it up.