White Labs WLP740 Merlot Red Wine from White Labs: 16 to 32 C (60 to 90 F), over 80 % attenuation, 18 % ABV tolerance, low flocculation. Styles and substitutes.
Updated 05 September 2026.
White Labs WLP740 Merlot Red Wine yeast: temperature, attenuation and alcohol tolerance
White Labs (liquid)The published White Labs data for White Labs WLP740 Merlot Red Wine, the styles it suits, and what to use if you cannot get it.
Published technical data
| Manufacturer | White Labs (liquid) |
|---|---|
| Species | Saccharomyces cerevisiae, wine strain |
| Fermentation temperature | 16 to 32 C (60 to 90 F) |
| Apparent attenuation | over 80 % |
| Alcohol tolerance | 18 % ABV |
| Flocculation | Low |
Notes
Recommended for merlot, cabernet, dry red wine, big fruit wine.
Character: Robust red-wine strain with high alcohol tolerance.
A red-wine strain with an 18% tolerance for big, high-alcohol reds and fruit wines. It ferments dry and complete and handles a strong must, which is why it is a pick for a high-gravity red or a strong country wine.
Substitutes and styles
Questions and answers
What is the manufacturer of the White Labs WLP740 Merlot Red Wine yeast?
White Labs (liquid)
What is the species of the White Labs WLP740 Merlot Red Wine yeast?
Saccharomyces cerevisiae, wine strain
What is the fermentation temperature of the White Labs WLP740 Merlot Red Wine yeast?
16 to 32 C (60 to 90 F)
What is the apparent attenuation of the White Labs WLP740 Merlot Red Wine yeast?
over 80 %