 Chardonnay also experienced a surge of interest in the 1990s and along with Riesling are among the most widely planted grape varieties in the state.While the acreage of Riesling has been steadily declining, there has been renewed interest in the grape in recent years that has been bolstered by the joint Eroica venture between Chateau Ste.Michelle and German winemaker Ernst Loosen and the investment by Bonny Doon founder's Randall Grahm to open a winery focused solely on Riesling production.