Suitability of a region for the viniculture which can be measured by objective criteria. Important criteria are climate and Weather for the prosperity of vines in the course of the growth cycle have eminent significance. The exposition (Direction of sunshine) or alignment of the Rows of vines plays an extremely important role, with one hillside with corresponding Tilt the effect is still positively reinforced. In warm-favored, dry areas are southeast to east slopes, in climatic border areas with heat deficits but sufficient rainfall South to southwest expositions are optimal. The optimal temperature for the growth of the vine is according to research in Geisenheim between 25 and 28 ° C. Towards the end of the Maturity date It should be between 15 and 20 ° C to ensure optimum physiological maturity the grapes to reach. Sunny days alternate with cooler nights in terms of balance sugar and acid advantageous. Just before the vintage Heavy precipitation is undesirable because of the risk of dilution.