Hypertufa sounds like a plant disease, but it's not; it's something that you might want to bring into your garden. The name comes from tufa, a porous, lightweight, soft rock. It's easy to gouge out a ...

A gardener shows off a planter curved out of a volcanic lava rock at one property expo in Kampala. The rock planter is perfect for gardening because it is porous. Photo/Esther Bridget Nakalya. Betty ...