Premiant hops for clean bitterness in a Czech pilsner

A Czech hop built to bitter quietly

Premiant was bred at the Hop Research Institute in Žatec and registered in the 1990s. It was designed as a bittering hop for Czech lager: higher alpha than Saaz, with a mild, pleasant aroma that would not clash with the classic Czech character.

Alpha acid usually measures around 7 to 10%, roughly two to three times a typical Saaz crop. It is often noted for a low share of cohumulone among its alpha acids, commonly quoted around 18 to 23%. Many brewers associate low cohumulone hops with a smoother bitterness, though the evidence on that point is debated. Our guide to the cohumulone debate covers both sides.

Why not bitter with Saaz alone?

A Czech premium pale lager traditionally gets all its hops from Saaz. With Saaz at 3.5% alpha, a 1,000 litre batch at 36 IBU needs several kilos of hops. That much leafy material in the kettle brings more polyphenols and grassy character, soaks up more wort and costs more.

Splitting the work solves that. Premiant handles most of the bitterness from an early addition with far less hop matter. Saaz goes in later, where its aroma survives. The finished beer still tastes like a Czech pilsner, with less kettle loss and often a cleaner bitterness.

The dosing maths

For a 1,000 litre Czech style pilsner at 36 IBU, at 28% utilisation for the 60 minute addition:

• Premiant at 60 minutes for 22 IBU, at 8.5% alpha: 22 x 1,000 / (0.085 x 0.28 x 1,000), about 920 g.
• Saaz at 30 minutes for about 10 IBU, at 3.5% alpha and roughly 20% utilisation: 10 x 1,000 / (0.035 x 0.20 x 1,000), about 1,430 g.
• Saaz in the whirlpool at around 80 °C, 1 to 1.5 g per litre, for aroma and the last few IBU.

Compare that with bittering on Saaz alone at 60 minutes: 22 IBU would need about 2,240 g of Saaz before the later additions even start. Utilisation falls as wort gravity rises, so a stronger pilsner needs a larger charge. Measure the IBU of a few finished batches and correct your own utilisation figure.

The malt it pairs with

A Czech pilsner is built on a pale, slightly richer malt than a German pils, often with a fuller body and a touch more colour from decoction mashing. Bohemian style pilsner malts are made for exactly that. Our guides to Weyermann Bohemian Pilsner malt and Weyermann Pilsner malt explain the difference.

The richer the malt, the more bitterness it can carry. That is why a Czech pilsner at 36 IBU can taste rounder than a drier German pils at 30. If you brew with rice or another adjunct for a lighter body, bring the bitterness down a few IBU or the beer will taste sharper than intended.

Water and bitterness quality

Plzeň's water is famously soft. Czech pilsner bitterness is shaped by it. Hard water high in bicarbonate raises mash and wort pH, which pulls more harsh compounds from the hops and makes bitterness linger. Much Indian borewell water is hard. For a Czech style pilsner, dilute it with reverse osmosis water, keep mash pH around 5.2 to 5.4 and avoid adding much sulphate, which sharpens bitterness further.

A clean bittering hop on hard, high pH water can still taste rough. When a pilsner tastes harsh, check the water report and the pH log before you blame the hop.

Substitutes and storage

If Premiant is unavailable, other clean bittering hops work: Magnum, Perle or the Czech Agnus at a lower dose. Some Southern Hemisphere bittering hops with clean profiles, such as Dr Rudi, also fit, though they bring their own accents. Always recalculate from each lot's certificate.

Store Premiant frozen at around minus 18 °C in sealed foil. Alpha acid falls faster in warm storage, which matters in Indian summers. A bittering hop that has lost a tenth of its alpha leaves a Czech pilsner noticeably short.

Before your next pilsner

Work out how many grams of hops you currently boil for 60 minutes and how many IBU they deliver. Then recalculate the same IBU with Premiant from a real certificate. Brew one batch with the split schedule above and taste it against your usual beer. If the bitterness feels cleaner and the Saaz aroma is unchanged, you have found a better hop bill.

Common questions

What alpha acid does Premiant have?

Usually around 7 to 10%, two to three times a typical Saaz crop.

Why use Premiant instead of Saaz for bittering?

It delivers the same bitterness with far less hop matter, which cuts kettle losses and grassy character, while its mild aroma does not clash with the later Saaz additions.

Is Premiant bitterness smoother?

Many brewers find it smooth. It is also noted for a low cohumulone share. The link between cohumulone and harshness is debated, so judge it in your own beer.

What can I use instead of Premiant?

Magnum, Perle or Agnus work as clean bittering hops. Recalculate the weight for each lot's alpha.