The
making of fine wines starts in the vineyards. While nature plays a major role
in determining the quality of the vintage, the viticulturist also can significantly
affect the outcome of the growing season through proper vineyard management.
Grapes
tend to be choosy about the ground in which they are planted.
Before a site is chosen, a thorough analysis must be made to ensure that it
has the right mineral content, good drainage capacity, and the proper degree
of soil compaction.
The
orientation of rows can vary and the density of plants per
acre may range from around 600 per acre in most American vineyards to 4,000
per acre in Burgundy.
Traditionally
vines were free standing. The trellis is the combination
of posts and wires used by the modern grape grower to manage the growth of
the vines. There are many types of trellising. The Williamsburg Winery favors
the vertical system, which encourages the shoots to grow upward, allowing
the sun to shine directly on the berries, a factor vital to the development
of the aroma compounds and overall quality. During the winter many man-hours
are spent pruning the vines to limit the number of buds and reduce the yield
in order to enhance fruit quality.
Healthy
berries with the proper balance of sugars, acids, and varietal flavors
are the result of the right balance of sun, rain, canopy, and soil constituents.
Within the leaves, photosynthesis occurs when sunshine converts carbon dioxide,
water and inorganic salts into carbohydrates, and the grapes themselves are
the primary beneficiaries of this process. Without enough direct sunlight, however,
the clusters will not ripen sufficiently, reducing the Brix, or sugar, levels
in the grapes.
At
the Williamsburg Winery harvest begins in late August or
early September and lasts until mid-October. The viticulturist and the winemaker
must decide which characteristics they want to optimize in the grapes of a
particular variety or from a particular vineyard – whether to harvest
for sugar, acid, or for specific aroma compounds. Generally, white grape varieties
are harvested before red varieties. It is important to pick the fruit at the
peak of ripeness. Weather conditions during the last six weeks prior to harvest
will have an enormous impact on the ultimate quality of the fruit. No sprays
are applied during the last two weeks to eliminate the potential of any residue
on the grapes.
At
the Williamsburg Winery the grapes will be picked by hand
(very large vineyard operations use mechanical harvesters). The grapes are
picked into individual lugs, holding about 35 lbs of fruit, and then dumped
into a half-ton bin. The bins are then hauled to the crush pad for processing.
As the grapes arrive they are weighed and inspected for quality. If all is
satisfactory the grapes are dumped into the de-stemmer/crusher which separates
the berries from the stems and splits each berry allowing for easier flow
of juice.
For
white grapes the juice, or must, is pumped into a press.
It is generally desirable to minimize the skin contact of white grapes, so
they are pressed right away. From the press the juice will be pumped into
a tank and held for a couple days to allow for settling of the solid fractions.
Once settled and racked again, into another tank or barrels, the juice will
be inoculated with yeast to start the fermentation. After the tank fermentation
the wine will be racked off the lees (the remaining post fermentation solids)
into another tank. Here the wine will stay until ready to blend, filter and
bottle. If barrel fermented, the wine will remain in the same barrel, on the
lees, until ready for blending.
For
red grapes the process varies. Once they have gone through the de-stemmer/crusher
they are pumped directly into a fermentation tank. Here it is critical that
the juice is in contact with the skins. Once in tank the winemaking team will
inoculate with yeast to start the fermentation process. Once complete, generally
about 10-14 days later, the entire contents of the tank will be pumped into
the press where the solids are separated from the wine. The red wine will
then be pumped into a tank where it will settle for a few days. The racking
and settling process takes many weeks and can require up to four different
rackings.
Once
finished, the wine will be stored in oak barrels or stainless
steel tanks, depending on the variety and style of wine desired. The aging
process may take up to 1 to 2 years. After that they will be blended,
filtered and bottled.