The nineteenth-century fruit growers of Montreuil adopted innovative peach growing techniques to produce the most coveted stone fruits in the world. Their secret lay in the construction of a honeycomb of solar walls.
Herb Spirals are a way to create many micro-climates in a small area. The idea is for the herb spiral to create height and width. The height creates drainage - drier on top, boggier at the base. The height also creates shade. Plants on the south are in the shade (in the southern hemisphere that is), plants on the western side are exposed to stronger sun than those on the eastern side.