Wyeast 4007 MLF Bacterial Culture

About Wyeast 4007 Malolactic Fermentation - MLF - Bacterial Culture

The Wyeast 4007 Malolactic Fermentaion Culture comes in a liquid form which is directly pitchable and requires no re-hydration steps. This MLF blend is suitable for any wine with an excessive malic acid sharpness. MLF is popular in Chardonnay as well as Pinot Noir and many other red wine varieties. Malolactic Fermentaion or MLF is the conversion of malic acid, a sharp tasting acid, to lactic acid which tastes softer. This fermentation is performed by a bacterial culture, most often oenococcus oeni. Some diacetyl is produced as well, leaving a soft buttery mouthfeel.

Specifications for Wyeast 4007 Malolactic Fermentation - MLF - Bacterial Culture

  • Alcohol Tolerance: 15% ABV
  • Free SO2 Tolerance: 15 ppm
  • pH Tolerance: Down to pH 2.9
  • Max. Inoculation Volume: 6 Gal.
  • Operating temperature: 55-90 F
How to Use
  • A nutrient specifically formulated for malolactic bacteria, Acti-ML, is available here. It contains nutrients needed by the bacteria as well as cellulose to help keep the organisms buoyant during fermentation.
  • This article discusses the why and how of performing MLF on your wine including MLF strain selection, best practices for success, encouraging or discouraging buttery diacetyl production, and the greatest mystery of them all---determining whether the MLF fermentation has completed:

Click to unravel the mysteries of malolactic fermentation.



We are not happy unless you are. To ensure your satisfaction, we offer our guarantee backed by our promise of a full store-credit refund on any unsatisfactory product or delivery---no need to ship anything back. Simply email us at info@thebeveragepeople.com if the need to claim this guarantee should arise.

Pickup Locations Available for This Item

The Beverage People Warehouse, Santa Rosa.

Fulfillment occurs Tues - Sat, 11 AM - 5 PM. We aim to fulfill orders in 2 hours or less, whenever possible.

 Click for details about our pickup location.

Shipping Details
Shipping options available in the shopping cart. Standard shipping rates from the carriers apply to all shipping orders.

How to Return Goods for Refund

All our supplies are guaranteed for one year. Request for refunds occurring more than 30 days after the date of purchase on non-defective goods may be granted as a store credit if the goods are returned in their original condition. Yeast is perishable and should be refrigerated on arrival. No refunds are allowed on sales of living organisms such as yeast and bacteria.