If your mix isn't too runny, you can shape it, however, I think you have to work kind of fast. I've never tried shaping anything without a mold but the stuff I've made sets pretty quickly. I know some people carve their hypertufa, but they may be using a different recipe. Try using the Search feature. I know there has to be info on this forum from previous posts.
If you make it, be sure to post a picture - I'd love to see the finished croc in the ground cover.

Sorry it took a while to respond Jannoel. Thanks for your comments. I did try the search feature but am still not really understanding the process of mold making. I did submit another entry looking for more info. on molds. If I figure out how to make this and it works I will try to post a picture for you.