Hupertufa is fun to make. It's like making mud pies when you were a kid,, just with cement. It is best when making a container for plant material that you use Portland cement. The other cements have too much lime in them and the plants don't like it.
I've made lots of these type containers, you may use many things for forms ; such as shoe boxes, lasagna pans, old broken pots and even deflated basket balls.
This is a great art form for the garden also, you can use this method to also make stepping stones, bird baths etc.
Let your imagination go wild.
There are many recipes on line to make this mix, but I like equal parts, portland cement, builders sand and sifted peat moss. This mix gives a natural look to the container.
After I unmold the container(after 24 hours) I roughly rub the outside with a wire brush to leave ruts and ridges.
After the container is planted. I make a mix of yougart and moss(from the woods) blend in a blender and paint on the outside of the container. Within a few weeks this mix will start growing on the outside of the container and give an old mossy feel to the container.
Have fun playing around with this stuff.
WOW...a few years ago I used a recipe off the TV for a cement planter...now i know the name of that project...Hypertufa...and thanks to CFB in TN for the great informative site. http://www.the-artistic-garden.com This is a great site. My planter fell apart in 2 days, and the stepping stones broke in half. Now I know why. The TV instructions said to unmold in 24hours, and to air dry in the sunshine uncovered. Well, that didn't work and I gave up. Now I will try again thanks to the artistic garden site.