After reviewing recent use of various techniques employing turf and other flora ( soft capping ) for the consolidation of ruined stone structures at Jervaulx, Bolingbroke, and Tintagel, the article reports on the experiments at the 18th-century garrison on the island of St. Mary. Here, in 1992, the authors used a mixture of soil and proprietary material called DANU as a growing medium to help re-establish the natural flora on top of 1-2-m high granite walls of the garrison. -- AATA