I've never made one so I won't be any help on the construction of it. I just wanted to say a real moss topiary sound absolutely delightful! Maybe also you could use echeveria, or other little succulents like those succulent wreaths or hens and chicks. Someone here will probably have some good ideas or try googling it, too.

Here is a link to instructions that I found. It doesn't sound like you need soil. Good Luck, and post a pic when you're finished!

Here is a link that might be useful: how to make a succulent topiary

This is one of those "don't I feel dumb" moments! You gals are so GOOD for me! I was thinking I had to spread sheet moss all over the outside of the frame which would leave the inside hollow. OBVIOUSLY, I was having one of those brain hiccup moments...no dummy Thyme....FILL the frame with moss! Sheesh! That's so obvious I feel stupid not having realized it!

Just yesterday I pruned some hens and chicks that were outgrowing their mug, so I have a starting place with the planting!

THANKS!

Don't feel dumb... I did'nt know either, until I found the instructions! You have inspired me to do a succulent topiary or two of my own!

I'v found that "steppables" work best in those forms of topiary. You can find them at most local garden shops. Their is all types, some for sun, shade, some that trail, and some that flower. Check it out. You may be able to do a search for them and see the different types you can choose from. Also you could find the shops that carry them.
Hope this helps.

>>I'v found that "steppables" work best in those forms of topiary.

Great idea...and I think it'd look great! Do you think I'd need to add dirt to the topiary for the steppables to grow into? Or do you think they'd root into moss?

I have a wire form frog that I lined with moss then put some potting soil in the middle and filled it with hen and chicks. Sadly my daughter's frind was turning her car around and ran over it. Dead frog.

I have just started my topiary. I am testing wet foam, the type florist use, soaked it in a solution of root stimulant, covered it with sheet moss, then planted echeveria - using fern pins. Will let you know how it goes. It has only been planted a week and looks good so far.