The Country Gardens special edition to BHG Early Spring 2010 issue gives a tease of "Easy to Make Hypertufa Troughs."
"Easy to make, these cool containers work in any style garden. Beth Jimenez and Amelia Lane, owners of Lasting Impressions in Raleigh, show you how to make inexpensive hypertufa troughs."
No article in this magazine but go to their link. A little troublesome to get to but here it is.
Two other links from BHG site are:
Build a Stone Look Trough