Brooks Groves

Opal

BarthHaas describes it as liquorice, cinnamon, bergamot, barrique, woodruff.

Dual purpose
Origin Germany
Code OPL
Bred by Unrecorded
Two or more independent sources
Smells like
Licorice, Cinnamon, Citrus, Woody, Herbal
Bitterness
Moderate (5–10.5% alpha)
Swap it for
Sladek Β· compare them β†’

Brewing values

range on filetypicalbreeder or labmerchant

Alpha acid

5–10.5% typical 7.1

2 sources, spread of 5.5%
  • Hopsteiner5–8Data sheet last changed 2020-01-09.
  • BarthHaas5–10.5Range over the last 4 crop years.

Beta acid

3.5–7.5% typical 5.0

2 sources, spread of 4%
  • Hopsteiner3.5–5.5Data sheet last changed 2020-01-09.
  • BarthHaas3.7–7.5Range over the last 4 crop years.

Cohumulone

15–17% of alpha typical 16

1 source, spread of 2% of alpha
  • Hopsteiner15–17Data sheet last changed 2020-01-09.

Total oil

0.8–2.4 mL/100g typical 1.3

2 sources, spread of 1.6 mL/100g
  • Hopsteiner0.8–1.3Data sheet last changed 2020-01-09.
  • BarthHaas0.8–2.4Range over the last 4 crop years.

Alpha to beta runs about 1.4:1, 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 1.8% 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%
  • Linalool1.3%

Aroma

  • Licorice
  • Cinnamon
  • Citrus
  • Woody
  • Herbal

What to swap it for

  • Sladek 47
    aroma 57 Β· oils β€” Β· chemistry 81 partial data
  • aroma 55 Β· oils β€” Β· chemistry 75 partial data
  • aroma 59 Β· oils β€” Β· chemistry 66 partial data
  • aroma 46 Β· oils β€” Β· chemistry 82 Β· shifts dual to aroma partial data
  • aroma 48 Β· oils β€” Β· chemistry 78 Β· shifts dual to aroma partial data
  • aroma 48 Β· oils β€” Β· chemistry 74 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.