Wyeast 1084 Irish Ale
Wyeast 1084 Irish Ale

Wyeast 1084 Irish Ale

$13.99
Wyeast 1084 Irish Ale delivers clean attenuation, high alcohol tolerance, and flexible fermentation character for dark and high-gravity beers.
  • Handles high ABV with ease
  • Dry & crisp or rich & fruity, depending on temp
  • Contains 100 billion cells, treats 5 gallons
Ice pack:

Ice Packs / Shipping:For best results, we strongly recommend adding an ice pack to your liquid yeast order. Ice packs do not guarantee that yeast will arrive cold, but will keep yeast colder for longer during transit. We can not replace yeast that arrives warm. In warm weather months, we highly encourage choosing dry yeast. Liquid yeast is final sale. As a live, perishable ingredient that requires refrigeration, we are unable to accept returns or exchanges once an order has left our warehouse.

Storage: Store in the fridge (33–38ºF). Do not freeze. Pitch cold - do not warm to room temp prior to pitching. Use within 4 months for direct pitching. For pouches older than 4 months, or that are warm, use a yeast starter to boost cell count.

Fermentation Temp Range
Each yeast strain has a temperature range where it performs best. Lagers require cooler temps, while Kveik yeasts can ferment in extreme heat. Maintaining the proper fermentation temperature for each yeast strain is crucial its health. Matching a yeast's ideal range to your environment (or your ability to control temp) is key to getting clean, consistent results.
Scale from 30°-120°F
Product Analysis
This typical analysis is not to be construed as product specification. Typical analysis represents average values, not to be considered as guarantees, expressed or implied, nor as a condition of sale.

Yeast Format, Liquid
Yeast Style, Ale
Flocculation, Medium
Attenuation, 71~75%
Fermentation Temperature Range, 62~72°F
Alcohol Tolerance, 12%

Wyeast 1084 Irish Ale is a versatile, high-tolerance strain known for performing exceptionally well in dark and high-gravity beers. When fermented on the cooler end of its range, it produces a dry, crisp finish with restrained esters. At warmer temperatures, it develops a richer, fruit-forward character that adds depth and complexity.

With attenuation between 71–75% and medium flocculation, this yeast supports balanced body while allowing roasted malts and specialty grains to shine. Ferments best between 62–72°F and handles alcohol levels up to 12%, making it ideal for both sessionable stouts and bold barleywines.

Wyeast 1084 excels in malt-forward and high-gravity ales.

Ideal for:

• Irish Stout
• Irish Red Ale
• Oatmeal Stout
• Baltic Porter
• Wee Heavy
• American Barleywine

• Store refrigerated at 33–38°F
• Do not freeze
• Pitch cold into well-oxygenated wort
• Ferment between 62–72°F
• Cooler temps yield a drier finish
• Warmer temps enhance fruity complexity
• Consider a starter for high gravity beers

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Frequently Asked Questions

Wyeast 1084 can ferment clean and crisp at cooler temperatures or develop richer fruity esters when fermented warmer.

Yes. It is especially well suited for Irish stouts, oatmeal stouts, and other malt-forward dark ales.

This strain tolerates up to approximately 12% ABV, making it ideal for higher gravity beers.

Ferment between 62–72°F depending on your desired flavor expression.

For higher gravity beers or older yeast packs, a starter is recommended to ensure strong fermentation performance.

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