Brooks Groves

Hallertau Magnum

BarthHaas describes it as pepper, cedar, mint, orange, cream.

Dual purpose
Origin Germany
Code HMG
Bred by Unrecorded
Two or more independent sources
Smells like
Black pepper, Cedar, Mint, Orange, Creamy
Bitterness
Very high (9–18.2% alpha)
Swap it for
Karma Β· compare them β†’

Brewing values

range on filetypicalbreeder or labmerchant

Alpha acid

9–18.2% typical 13.6

2 sources, spread of 9.2%
  • Hopsteiner11–16Data sheet last changed 2020-01-09.
  • BarthHaas9–18.2Range over the last 4 crop years.

Beta acid

4.1–7.1% typical 5.8

2 sources, spread of 3%
  • Hopsteiner5–7Data sheet last changed 2020-01-09.
  • BarthHaas4.1–7.1Range over the last 4 crop years.

Cohumulone

21–29% of alpha typical 25

1 source, spread of 8% of alpha
  • Hopsteiner21–29Data sheet last changed 2020-01-09.

Total oil

1.5–3.9 mL/100g typical 2.5

2 sources, spread of 2.4 mL/100g
  • Hopsteiner1.9–2.8Data sheet last changed 2020-01-09.
  • BarthHaas1.5–3.9Range over the last 4 crop years.

Alpha to beta runs about 2.3:1, which is what governs how fast the bitterness fades in storage.

Oil composition

Not enough of this hop's oil is accounted for to show a breakdown. The sources on file name components totalling 0.8% of total oil β€” most of the balance is myrcene, which the source for this record doesn't publish. Rather than scale what's here up to 100% and invent the rest, here is only what was actually measured:

  • Farnesene0.5%
  • Linalool0.3%

Aroma

  • Black pepper
  • Cedar
  • Mint
  • Orange
  • Creamy

What to swap it for

  • Karma 42
    aroma 60 Β· oils β€” Β· chemistry 60 partial data
  • aroma 41 Β· oils β€” Β· chemistry 83 partial data
  • Pilgrim 41
    aroma 50 Β· oils β€” Β· chemistry 69 partial data
  • Admiral 38
    aroma 51 Β· oils β€” Β· chemistry 59 partial data
  • Vital 38
    aroma 29 Β· oils β€” Β· chemistry 87 partial data
  • HBC 843 37
    aroma 37 Β· oils β€” Β· chemistry 75 partial data

Scored on aroma overlap, oil composition and acid chemistry, then nudged up where a brewer has vouched for the swap by hand. An axis we haven't measured earns nothing, so a hop known only by its acid numbers caps out around 30 β€” the score is how much evidence there is for the swap, not just how close the numbers happen to be. Anything under 50 is a different beer, not a substitution.

Pedigree

Parentage unrecorded.

Notes on this record

purpose defaulted to dual, unconfirmed -- was not researched individually for this bulk scaffold pass. Correct before publishing.

HopLove is an open dataset first and a website second. Every figure on this site is rolled up from cited observations in data/hops/, and the same build that made this page wrote ../../api/v1/hops.json β€” free, no key, no rate limit.

Built 2026-09-30T05:41:31.791Z from 232 cultivar records. Data under CC BY 4.0, code under MIT. Source and corrections on GitHub. Not affiliated with any hop breeder, farm or merchant; variety names are the marks of their owners.