How to harvest…


Wine / Friday, March 5th, 2021

As I reported last week, the pinot noir grapes destined to become our 2021 Sparkling Pinot Noir were picked from Paul Henschke’s vineyard in Summertown early Friday morning. They spent a couple of days in the cold room and were pressed on Sunday evening. Look at that beautiful juice coming out of the press!

While the yield was a bit lower than in previous years, the fruit quality was excellent. The final sugar level was 10.5 Baum√© (and for those interested in the other important numbers… pH was 3.13 and TA was 10.9).

 

Looking forward, the pinot noir for our LDR (Light Dry Red) and the sauvignon blanc will likely be picked Wednesday night for processing on Thursday (subject to final tests). Chardonnay should be a day or two after that.

No doubt I will have more news for you next week, so stay tuned.

 

While we’re waiting though, let’s have a look back at a post from a couple of years back. It explains how our grapes (and grapes in general) are picked…

Enjoy!

 

Pick me!

The romantics amongst us probably imagine that all grapes are lovingly picked by hand… gently placed into baskets and carried to the winery by dedicated but carefree workers basking in the glow of the late summer sun. No? Just me?

Well, traditionally grapes have always been picked by hand (I may have taken a little creative licence with the carefree basking). These days though, we also rely pretty heavily on machinery.

But it all depends a bit on the variety and style of wine.

Let’s take a closer look at each method and find out exactly what Rob does with his grapes…

Picking by hand

Hand-picking is obviously the gentlest way to handle grapes at harvest time. It allows the removal of whole bunches – leaving the berries attached to the stalks.

Mechanical harvesting

Mechanical harvesters work by moving along the row and shaking the vines. This movement causes the berries to fall off their stalks.

There are several benefits to using machine over hand-picking. Firstly, and most obviously, it allows grapes to be picked at a fraction of the cost and time. This can be really important when the grapes have reached their desired ripeness and need to be removed quickly. Secondly, these machines can pick through the night when temperatures are cooler. As we know, oxidation can occur at higher temperatures, so picking at night is often a better option if daytime temperatures are high. Ideally, grapes should be picked at an ambient temperature of between 8 and 16 degrees Celcius.

 

So why pick by hand at all?

There are a few situations for which mechanical harvesters cannot be used…

Some vineyards are simply inaccessible to heavy equipment. Steep slopes can make mechanical harvesting impossible.

In other cases, the winemaking technique dictates the use of whole bunches. For example:

  • in the production of premium sparkling wine where whole bunch pressing is used to extract the juice
  • When red wines are made using carbonic maceration
  • Where there is a need to select only certain bunches or parts of bunches due to the presence of disease.

Carbonic maceration is a winemaking technique in which whole grapes are fermented in a carbon dioxide rich environment prior to crushing. The result are wines that are fruity in aroma and flavours, sometimes with a distinct banana aroma. They lack tannins, and deep color. Carbonic Maceration is most commonly practiced in Beaujolais with the Gamay grape, which has thin skins and produces lots of fruity aromas and flavours.

So which method does Rob use?

The Pinot Noir Rob uses for his Sparkling and Rose along with his Sauvignon Blanc are always hand-picked.

The main principle is to finish up with fine, delicate, low colour juice. The tannins also need to be low. Since colour, tannins and compounds leading to a bigger-bodied juice/wine are in the skins, it makes sense to keep berries/skins intact until the bunches get to the press. Machine harvesting always causes rupture of skins and release of juice, no matter how well it’s done.

For red wines and bigger-bodied whites such as Chardonnay, this extra extraction is not a problem, so all the varieties for dry red (Shiraz, Tempranillo and Pinot) are machine harvested. It’s also beneficial for Chardonnay to be machine picked as it helps to give more body, and the slight extra tannin is easily absorbed with the barrel ageing.

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