With a late spring and relatively cool summer, it is turning out to be a high acid year in North Dakota and Minnesota. Here are the latest numbers from NDSU's test vineyard in Absaraka, ND. Sugar levels are fine but the pH is very low.
Brix pH
1 Bluebell 17.6 2.76
2 Campbell's Early 15 2.85
3 Elvira 13 2.56
4 ES 10-18-75
5 ES 12-6-18 (dirt) 23.4 2.88
6 ES 3-20-33
7 ES 5-4-71 17.4 2.8
8 ES 9-4-72
9 Frontenac 24.6 2.89
10 Frontenac Gris 24.8 2.94
11 GR-7 22 2.95
12 John Viola 22.8 2.78
13 King of the North 20.8 2.66
14 Laura's Laughter 18.6 2.6
15 Leon Millot 22.4 3.07
16 Louise Swenson 19.2 2.97
17 Marechal Foch 23.2 3.03
18 Marquette 25.2 2.66
19 MN 1131 26.4 2.83
20 MN 1200 23.8 2.89
21 MN 1220 23.6 2.99
22 MN 1235 22 2.83
23 MN 1258 24.8 2.8
24 Petite Amie 19.6 2.74
25 Prairie Star 22.4 3.1
26 Sabrevois 19.4 2.84
27 St. Croix 19 2.77
28 Steuben 16 2.42
29 TP 1-1-34 19.6 2.61
30 Valiant 21.2 3.12
31 Worden 14.2 2.54
Brix pH
1 Bluebell 17.6 2.76
2 Campbell's Early 15 2.85
3 Elvira 13 2.56
4 ES 10-18-75
5 ES 12-6-18 (dirt) 23.4 2.88
6 ES 3-20-33
7 ES 5-4-71 17.4 2.8
8 ES 9-4-72
9 Frontenac 24.6 2.89
10 Frontenac Gris 24.8 2.94
11 GR-7 22 2.95
12 John Viola 22.8 2.78
13 King of the North 20.8 2.66
14 Laura's Laughter 18.6 2.6
15 Leon Millot 22.4 3.07
16 Louise Swenson 19.2 2.97
17 Marechal Foch 23.2 3.03
18 Marquette 25.2 2.66
19 MN 1131 26.4 2.83
20 MN 1200 23.8 2.89
21 MN 1220 23.6 2.99
22 MN 1235 22 2.83
23 MN 1258 24.8 2.8
24 Petite Amie 19.6 2.74
25 Prairie Star 22.4 3.1
26 Sabrevois 19.4 2.84
27 St. Croix 19 2.77
28 Steuben 16 2.42
29 TP 1-1-34 19.6 2.61
30 Valiant 21.2 3.12
31 Worden 14.2 2.54