In wet winter climates, "fast drainage" is very necessary to facilitate the quick drying which other climates experience. In Britain we can experience Spring, Summer, Autumn, and Winter in a 24 hour period. Peter (UK) On 15 November 2014 23:19, penstemon <penstemon@q.com> wrote: > > In the literature, especially the rock garden literature, there are >> articles (some of which read like calculus puzzles and kept me tied in >> knots) discussing drainage. To make a long story short, I think it's >> largely bunk as far as most summer dormant plants are concerned. >> > > It's complete bunk as far as anything having to do with plants is > concerned, but seems to have some relevance growing plants in wet-winter > climates. >