Marsanne
Marsanne is the predominant white grape variety grown in the Northern Rhône where it is used to produce white St. Joseph, Crozes-Hermitage, and Hermitage. It is a tricky grape to cultivate, being susceptible to diseases and being particularly sensitive to extreme climatic changes - if growing conditions are too cool, then it fails to ripen fully and produces thin, insipid wines, while, if too hot, the resultant wines are blowsy, overblown and out of balance.