Grape Chemistry as of 9-29-12

 

Varietal

Date

Sugar (Brix)

pH

Total Acidity (%)

Primitivo

8-19-12

21.1

3.32

1.03

8-26-12

21.5

3.37

0.92

 9-2-12 (mean)*

24.7

3.52

0.77

9-9-12**

25.8

3.61

0.69

9-20-12#

26.5

3.72

0.74

9-29-12#

27.0

3.94

0.66

Tempranillo

8-19-12

19.4

3.48

0.54

8-26-12

21.3

3.63

0.46

9-2-12

22.2

3.58

0.42

9-7-12

22.3

3.64

0.43

9-13-12

23.9

3.77

0.40

Barbera

8-26-12

21.8

3.05

1.34

9-2-12

22.9

3.11

1.30

9-9-12

25.2

3.24

1.13

             9-13-12 (mean)*

26.0

3.28

1.02

Touriga (Quinta)

9-2-12

20.4

3.33

0.69

9-9-12

22.5

3.41

0.66

9-14-12

23.2

3.45

0.56

      9-19-12***

24.1

3.53

0.50

Touriga (’09)

9-13-12

21.5

3.41

0.65

9-20-12

22.8

3.44

0.63

9-29-12

23.5

3.52

0.58

Tinta Cao

9-13-12

22.7

3.44

0.58

9-20-12

23.6

3.60

0.55

9-29-12

24.2

3.69

0.50

*Two independent samples were collected and analyzed.

**Based on sampling of the ~75% of the vineyard remaining; ~25% is already harvested.

***Partial harvest sample

# Chemistry of portion of primitivo remaining following major harvest.

Comments:

We are squarely in “late harvest” territory for the primitivo now; the fruit is sweet and delicious.

Our ’09 touriga nacional continues to make steady progress on all fronts, now at 23.5 brix.  This fruit will be ready in 1-2 weeks.  The fruit is netted and warm weather continues in the forecast.

The tinta cao is ready to picked now and in the next week; the current heat wave should push the brix into the upper 24’s; acidity continues to drop.