Grape maturity testing, week of 9/13/2019

By Terence Bradshaw

Grapes continue to be slow to ripen. Warm days later this week should move early cultivars (Brianna, St Croix) along a bit, but most grapes need quite a bit more heat accumulation before harvest.

9/13/2019

Cultivar

Brix pH %TA (g/100ml)
Brianna 16.1 2.85 0.71
Verona 16.5 2.75 1.40
St. Croix 17.2 2.93 1.28
Louise Swenson 18.8 2.97 0.89
St. Pepin 19 2.94 1.46
Crimson Pearl 19.8 2.86 1.17
Petite Pearl 20.6 2.9 1.11
Itasca 21.8 2.95 1.19
Data collected 9/13/2019 at UVM Horticulture Research & Education Center Vineyard, South Burlington, VT.

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