READ · COMPARE · EXPLAIN
Georges Roumier: Blending within a single Grand Cru vineyard
A domaine based in Chambolle-Musigny specializing in Pinot Noir from vineyards such as Bonnes Mares. Technical notes by vineyard and vintage are provided, including information on soils, destemming, and barrel use.
I will explain, using Bonne Mares 2023, why there may be blending even in single-vineyard wines.
Questions for this course
Even for wines from a single Grand Cru vineyard, do they separate and blend base wines?
Before you start reading, briefly jot down your thoughts. You will rephrase them at the end.
To applied practice using the material ↓
To explanation task notes ↓Domaine Georges Roumier / Study by producer
France / Burgundy / Chambolle-Musigny
Other names & notations: Domaine Georges Roumier / ジョルジュ・ルーミエ
Update date: 2026-09-24
The two soils of Bonne Mares
The 2023 data on Bonne Mares describes lower sections with red soil and upper sections with white marl. Even within a single grand cru, internal conditions are not uniform.
Fermenting separately, then blending before aging
It is stated that the two base musts from different soils are vinified separately and blended when entering the aging stage. Even wines labeled with a single vineyard name may involve blending of base wines. Whether or not blending is performed alone can't determine the size of a vineyard.
The difference between 65% and 30%
The destemming rate in 2023 was 65%, the proportion of new barrels was 30%, and the maturation period was 16 months. The 65% refers to the treatment of grape bunches, and the 30% explains the proportion of new versus used barrels. You cannot add these two numbers together to create a blend composition.
What to align and what to compare.
Conditions within the vineyard
- Conditions to standardize
- Domaine Georges Roumier
- Conditions for comparison.
- Red soils and white marl.
- Additional points to confirm
- Even among grands crus, there are internal differences.
Winemaking
- Conditions to standardize
- Domaine Georges Roumier
- Conditions for comparison.
- Fermenting separately, then blending before aging
- Additional points to confirm
- Single-vineyard and blended wine can both apply.
2023 process
- Conditions to standardize
- Domaine Georges Roumier
- Conditions for comparison.
- 65% destemmed, 30% new oak, 16 months' maturation
- Additional points to confirm
- Numbers for different processes.
Order of reading and key points to consider in each article
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READ · HYPOTHESIZE · RECONSIDER
Reading Georges Roumier materials: Blending within a single Grand Cru vineyard
Compare the stated conditions in the documentation. Numbers specifying vintages should be treated as information for that specific year.
This summarizes materials published by producers, regional groups, and importers. Each source includes the publisher and the date the material was checked.
| Comparison items | What can be determined from the materials | Ability to distinguish by reading |
|---|---|---|
| Conditions within the vineyard | Red soils and white marl. | Even among grands crus, there are internal differences. |
| Winemaking | Fermenting separately, then blending before aging | Single-vineyard and blended wine can both apply. |
| 2023 process | 65% destemmed, 30% new oak, 16 months' maturation | Numbers for different processes. |
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Read the explanation for each question
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What are the conditions within Bonne Mares?
Official materials explain differences within the parcel.
When are base wines combined?
The differences in soil are separated during winemaking and then combined.
65%—what is this proportion referring to?
The 30% new barrels figure refers to a different stage in the process. The destemming rate is the proportion of stems removed from raw materials, while the new barrel rate is the proportion of new versus used barrels for aging. Since the remaining 35% and 70% correspond to different totals, they cannot be combined into a single blend table.
Basis and sources for the exercise
Practice exercises in comparison
Please explain differences in raw materials and winemaking by reading the table and sources.
Read examples of organizing comparisons
| Conditions for Comparison | Comparison items | What can be determined from the materials | Ability to distinguish by reading |
|---|---|---|---|
| Conditions within the vineyard | Red soils and white marl. | Even among grands crus, there are internal differences. | |
| Winemaking | Fermenting separately, then blending before aging | Single-vineyard and blended wine can both apply. | |
| 2023 process | 65% destemmed, 30% new oak, 16 months' maturation | Numbers for different processes. |
Sources of materials used for comparison are listed in the text and exercises.
Explain in your own words
Using Bonne Mares 2023, explain why there may be blending even in single-vineyard wines.
Check after writing
- Did you specify the label, vintage, and scope of materials to be compared?
- Did you distinguish and explain the three items in the table?
- Did you separate verified facts from points to check further with additional references or tasting?
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