A mild spring was followed by an extremely hot and dry summer. 1991 was a challenging vintage in Mosel due to the risks of drought. The vines shut off for almost three weeks in late August until mid-September, which had an adverse effect in yields and ripeness. Rain in the last week of September saved the vintage but the vineyards in hot and exposed locations could not make up for the lost growth in time for the harvest, which is why many of the best vineyards only yielded Kabinett whereas they could have yielded Auslese. Late arrival of botrytis in November enabled to make superb Trockenbeerenauslese and a deep frost in November produced some excellent Eiswein.