Lalvin BM4x4
(Saccharomyces cerevisiae cerevisiae)

The attributes of BM45 with optimized fermentation capacity

  • Suitable for organic wine (EU 2018/848)
  • Suitable for NOP
  • Vegan

Product detailsWine typesTechnical informationProduct documentationPairing
Product DescriptionDocumentation

Product details

BM 4X4® is a blend of BM45™ and another yeast known for its fermentation reliability. BM45™ is known and appreciated around the world for its round mouthfeel and stable color (see above description for BM45). However, BM45™ is a slow fermenter and can require substantial nutrients to complete fermentation successfully and without the production of sulfides. While BM45™ has a very strong following among winemakers who enjoy its slow fermentation and its suitability for long maceration programs, there are others who desire the attributes of BM45™ but with a more timely and secure fermentation. BM 4X4® achieves this goal. During the yeast growth phase, BM 4X4® has the unusual capacity of releasing a significant quantity of polyphenol-reactive polysaccharides into the fermenting must. The quantity and the quality of the polysaccharides released during fermentation facilitate the production of red wines with great mouthfeel and improved color stability, with dependable fermentation kinetics under difficult fermentation conditions. In whites, BM 4X4® releases a high level of esters responsible for fruit aromas and also brings roundness to the mouthfeel.

Selected by Selected by the Consorzio del Vino Brunello de Montalcino and the University of Siena, Italy

Wine types


Technical information

  • General sensory contribution: Varietal
  • Competitive factor: Active
  • Minimum temperature: 16 °C
  • Maximum temperature: 28 °C
  • Nutritional needs: High
  • MLF compatibility: Not-really-recommended
  • SO2production: Moderate
  • Fermentation rate: Moderate
  • Alcohol tolerance: 16 %
  • Glycerol production: No-info

Product documentation


  • Cabernet Franc: Plum, Color stability
  • Cabernet Sauvignon: Jam, Color stability, Round mouthfeel
  • Chardonnay: Volume
  • Chenin blanc
  • Grenache: Plum, Color stability
  • Malbec
  • Merlot: Plum, Color Stability
  • Nebbiolo: Plum jam
  • Petit Verdot
  • Pinot Gris: Rich mouthfeel
  • Pinot Noir: Jam, Color stability
  • Pinotage
  • Roussanne: Volume
  • Sangiovese: Plum, Color Stability, Mid-palate enhancement
  • Sauvignon blanc: Rich mouthfeel
  • Semillon
  • Syrah: Fruit, Structural enhancement, Color stability
  • Tannat
  • Tempranillo: Plum, Mid-palate enhancement
  • Viognier: Rich mouthfeel
  • Zinfandel: Berry, Jam, Spice, Plum