Hypertufa is art!
Technically speaking though, hypertufa is an artificial substitute for the naturaly formed Tufa rock. Tufa rocks are know for their microbiological component and porous identity. Plants love to grow in tufa planters because water gets stored in all of the little cracks so it is easily accesible in times of dryness. It also takes care of getting fresh air to the roots of the plants. Hypertufa is made by combining Portland cement with Sphagnum (peat moss), perlite or vermiculite and water. Hypertufa is fairly lightweight and resembles the structure of natural tufa so it is ideal for making pots, planters, troughs and other objects to brighten up your garden and give it a very natural look. It is also frost-resistant as opposed to cement which can sometimes crack during cold winters and you will find yourself cleaning up and buying a whole new trough, planter or pot.
To get an idea of the possibilities with hypertufa, take a look at the gallery here below.