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Isatis tinctoria Cultivation | Propagation | General Uses Cultivation Notes: An easily grown plant, it prefers a well-drained fertile soil in a sunny position[14], though it succeeds in ordinary garden soil[1]. Prefers neutral to alkaline conditions[238]. Plants deplete the soil of nutrients and cannot be grown successfuly on the same site for more than two years[4]. Plants are hardy to about -15°c[200]. Woad is a biennial, or occasionally a short-lived perennial plant. It has a very long history as a dye plant, being used by the ancient Britons to give a blue colouring to the skin. At one time woad was widely cultivated for this blue dye obtained from its leaves but with the advent of chemical dyes it has fallen into virtual disuse[4]. It is currently (1993) being grown commercially on a small scale in Germany as a wood preservative (An item on BBC's Radio 4 Farming Programme). Plants self-sow freely when they are grown in a suitable position[14], though they tend not to thrive if grown in the same position for more than two years[238]. For further Isatis tinctoria gardening information |
