Mangrove Jacks M44 US West Coast Ale Yeast 10g

M44 is the right yeast when your West Coast IPA needs to finish dry, clear, and hop-forward. It attenuates higher than US-05 and flocculates better, leaving a cleaner, drier beer with hop character in front and nothing competing behind it.

Best Suited To

• West Coast IPA, American IPA, Double IPA
• American Pale Ale, American Amber Ale
• Any American ale where a dry, neutral fermentation profile is the goal

Specs

• Fermentation temp: 18–23°C (optimal 19–21°C)
• Attenuation: 75–80%
• Flocculation: Medium-High
• Alcohol tolerance: Up to 12% ABV
• Pitching rate: 1 sachet per 23L at standard gravity

When to Choose M44

Choose M44 over US-05 when dryness and clarity matter. M44 attenuates more aggressively and flocculates better — useful when the malt bill is heavier or when you want hop bitterness to dominate without residual sweetness softening it. US-05 is more forgiving and faster to start.

Choose M44 over M66 when you are brewing West Coast, not hazy. M66 produces tropical fruit esters and permanent haze — right for NEIPA, wrong for a clear, bitter West Coast profile. M44 stays out of the way and lets the hops do the work.

Practical Notes

M44 has a longer lag phase than most dry yeasts. Twenty-four to 48 hours before visible fermentation is normal for this strain. Do not repitch — give it time.

Pitch directly onto wort at fermentation temperature, or rehydrate in 10x its weight in 27°C water for 15 minutes. Rehydrate and add yeast nutrient for beers above 1.065.

Ferment at 18–21°C for the cleanest result. Above 22°C ester character increases and works against the West Coast profile.

Keep refrigerated. Once opened, reseal and use within 7 days.

Reviewed by the AHB Brewing Team — June 2026.