Wakatu hops for a floral New Zealand pilsner

A Hallertau descendant from New Zealand

Wakatu was released in New Zealand in 1988 under the name Hallertau Aroma, reflecting its Hallertau Mittelfrüh parentage. It was later renamed Wakatu. It is a triploid variety, bred to be seedless, as many New Zealand hops are.

Alpha acid usually runs from about 6.5 to 8.5%, higher than its German parent. The aroma is floral, with lime zest and a light vanilla note. Compared with the spicy, herbal profile of German Hallertau, Wakatu is brighter and fruitier.

What a New Zealand pilsner is

A New Zealand pilsner keeps the lager base of a classic pilsner, pale malt, soft water and clean lager yeast, but swaps the European noble hop character for New Zealand fruit and floral notes. Typical numbers:

• 4.5 to 5.5% ABV.
• 25 to 40 IBU.
• Late hopping and often a dry hop for aroma.

It is not a formal competition category everywhere, so there is room to interpret. Most examples are crisp, bitter and fragrant, with lime, white wine or tropical notes depending on the hops.

Hop rates for a 1,000 litre batch

For a 1,000 litre New Zealand pilsner at OG 1.048 and 32 IBU:

• A clean bittering hop at 60 minutes for about 22 IBU.
• Wakatu at 7.5% alpha, 10 minutes, at about 10% utilisation for 6 IBU: 6 x 1,000 / (0.075 x 0.10 x 1,000) = 800 g.
• Wakatu 1.5 to 2 kg in the whirlpool for flavour, adding a few more IBU.
• Wakatu 2 to 3 kg dry hop, about 2 to 3 g per litre, during the diacetyl rest or early lagering.

Taste after lagering and adjust next time. Many New Zealand pilsners use more than this.

The floor detail: when to dry hop a lager

Dry hopping a lager raises a timing question. Hop material can contain enzymes that break down residual dextrins, a process called hop creep, which can restart fermentation and lift diacetyl. In a lager, that late diacetyl shows up as butterscotch weeks later.

Many brewers dry hop at the end of primary, during a diacetyl rest at around 14 to 16 °C, so the yeast is still active enough to clean up. Then they drop to lagering temperature near 0 °C. Check gravity a few days after dry hopping. If it drops, give the beer time before you crash it.

Lager discipline still applies

A New Zealand pilsner is still a lager. Pitch plenty of healthy lager yeast, ferment at around 10 to 12 °C and lager cold for two to four weeks. Soft water suits the style, with mash pH around 5.2 to 5.4. Indian borewell water is often too hard and needs dilution or treatment.

The hops add aroma. They do not cover for a warm, rushed fermentation. How a lager handles hop creep, diacetyl and sulphur depends on yeast health and temperature more than on the recipe. A Wakatu pilsner with sulphur or diacetyl is still a flawed pilsner. Our guide to bittering hops for clean lager bitterness covers the first addition.

Pairing and swapping

Wakatu blends well with other New Zealand varieties. Motueka adds more lime. Nelson Sauvin adds white wine. For a more restrained beer, it pairs with German Hallertau for a half step between the two traditions. Our Rakau guide covers a punchier New Zealand hop for ales.

If Wakatu is out of stock, Hallertau Mittelfrüh or Hallertauer Tradition gives a more classic profile. Motueka is closer in spirit if you want the New Zealand brightness.

Planning purchases from New Zealand

New Zealand hops are harvested from February to April. For an Indian brewery, that means fresh crop pellets usually arrive in the middle of the year. If Wakatu is your core pilsner hop, plan annual volumes and ask your importer about contracting rather than buying spot. Store cartons frozen, record lot alpha on each brew sheet and rotate stock first in, first out.

Serving it in India

A New Zealand pilsner suits Indian taprooms well. It is pale, crisp and familiar to lager drinkers, with enough aroma to feel like a craft beer. Serve it at 3 to 5 °C. That is cold enough to refresh in the heat but not so cold that the Wakatu aroma disappears.

Watch the line between brewhouse and tap. A hoppy lager stored warm in a delivery van or a storeroom loses its floral top notes within weeks. Keep kegs cold from the bright tank to the tap and pour the freshest batch first.

Common questions

What does Wakatu taste like?

Floral with lime zest and a light vanilla note. It is brighter and fruitier than its German Hallertau parent.

Is Wakatu the same as Hallertau Aroma?

Yes. Wakatu was released as Hallertau Aroma in 1988 and later renamed.

When should I dry hop a lager?

Many brewers dry hop at the end of primary during the diacetyl rest so the yeast can clean up any hop creep before lagering.