Trentadue Winery sells
a lovely viognier port
that I am using as a
model for my Viognier
RS = 11%
TA = 0.5g/100ml
pH = 3.83
• Viognier grapes are difficult to grow
and typically produce low yields.
• Trentadue uses grapes from the
Russian River Appellation,
specifically from Slusser Ranch
• Some other successful Viognier
vineyards are in Santa Barbara, Paso
Robles, & Sonoma.
Whole Add port
27-29 brix cluster wine yeast
stainless to stop
steel for 8 fermentation
Harvest at Grapes are
harvested with a
content, half of
which will remain
Port is very sweet!
Analyte- Sugar via
press Grapes are crushed in whole clusters.
Juice is in stainless steel tanks.
Analyte - Sugar via enzymatic
Add port 1/2 grape
wine yeast sugar
Analyte - Sugar!! The fermentation must
be stopped while much sugar is left.
True ports ferment to 1/2 of the original
sugar in the juice.
Trentadue’s port has RS of 11%.
Mine will have 8% RS like the port
produced by Bonny Doon because I
prefer it less sweet.
“Aguardente” is a distilled
wine with high alcohol
Analyte- alcohol content of aguardente
and 1/2 fermented wine.
Final alcohol content is determined by this
step!! Usually 18.5%
steel for 8
A short “reductive” aging.
Microbes are dead due to high alcohol
content, but we filter to make it pretty.
I will use a screw cap, so no cork QC.
Analytes- Alcohol & RS for labeling.