Mangrove Jack’s M84 Bohemian Lager Yeast – 10g

$6.50

Mangrove Jack’s M84 Bohemian Lager Yeast is perfect for brewing authentic European lagers and pilsners, offering high attenuation and flocculation for balanced, clean, and dry beers. Ideal for German pilsners, Bohemian lagers, and bocks, it ferments best at 10-15°C.

Best Before on this batch – 01/26

Out of stock

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Free local pickup in Noble Park, VIC
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Description

Mangrove Jack’s M84 Bohemian Lager is the traditional bottom-fermenting yeast in the MJ range, selected from the classic Czech and Central European brewing tradition for producing the soft, balanced, and delicately complex lagers that define the Bohemian school. Hop bitterness is crisp and clean, the malt character is full but never heavy, and the finish is dry — exactly as a Bohemian Pilsner or a well-crafted bock should pour.

Parameter	Range
Fermentation Temperature	8–14°C
Apparent Attenuation	72–76%
Flocculation	Medium–High
Alcohol Tolerance	~9% ABV
Format	10 g sachet

Brewing Notes

M84 requires genuine cold fermentation — 8–12°C primary gives the cleanest result with maximum sulphur scrubbing and minimum ester production. Pitch with adequate yeast (rehydrate the full 10 g sachet for a standard 23 L batch at 1.050; double-pitch for higher-gravity lagers) and oxygenate the wort thoroughly — cold wort absorbs oxygen more slowly than warm wort. After primary, lager at 2–5°C for a minimum of four weeks and preferably six to eight; the extended cold conditioning period rounds out any residual sharpness and promotes brilliant clarity. Bohemian Pilsner authenticity demands soft, low-mineral water — keep sulphate below 30 ppm and chloride moderate to allow the Saaz character to shine without harshness.

Beer Styles & Brewing Tips

Bohemian Pilsner & Czech Pale Lager — M84’s signature application; an all-Pilsner malt grist, soft water, and 30+ IBU of Saaz produces the real thing.
Munich Helles — lower hopping rate, slightly more malt sweetness, same soft water profile; M84 delivers the round, delicate Helles body.
Märzen / Oktoberfest — Vienna and Munich malts at a higher OG (1.054–1.060) with M84 create a rich, toasty amber lager for the season.
Bock & Dunkelbock — M84 handles moderate gravity well; a single-decoction mash with a mix of Munich and melanoidin malts produces a genuine Bock character.

In the Glass: Crystal-clear golden lager with a persistent white head. Soft malt sweetness leads on the nose, followed by the herbal, slightly spicy Saaz bitterness the style is famous for. The palate is clean, rounded, and refreshing — dry on the finish without any distracting ester or sulphur notes when properly fermented and lagered.

Mangrove Jack’s M84 Bohemian Lager is in stock and ships Australia-wide. Questions about cold fermentation schedules or comparing M84 to M54 Californian Lager for your setup? Contact the Yeast Platform team.

Recommended Hops for This Yeast

M84’s clean Bohemian lager character is defined by noble hop varieties — particularly Saaz, which is essentially non-negotiable for authentic Czech Pilsner. The hops below represent the classic lager palette from delicate to assertive.

Saaz — the essential Bohemian hop; spicy, herbal, and earthy — use generously at late kettle and as a dry hop for authentic Czech character
East Kent Goldings — floral and gently earthy; a traditional bittering choice for Helles and Märzen
Chinook — pine and citrus backbone; suits bock and stronger lager styles where more assertive bitterness is appropriate
Cascade — citrus-floral; a modern alternative for craft-style Pilsners and American lager interpretations brewed with M84