Lalvin BM4x4 is a blend of Lalvin yeasts that will bring out the best in both red and white wines. Unique to BM4x4, during the growth phase this yeast blend has the capacity of releasing a significant quanitity of polyphenol-reactive polysaccharides into the fermenting must.
I have made two Rieslings using BM4X4 and everyone agrees that the results are fantastic. we have noticed that it tends to bring out a lot of the tropical fruit aromas, while maintaining an even fruitiness, and acidity. I plan on doing another Riesling and possibly a Seyval Blanc this fall with it.