Veraison 2019 Suggests a mid-September Start to Harvest

This year, as both Jordy and I have noted, has been cool. Even the warm stretches have been moderate. And the vineyard has noticed. While in most years I would be posting about veraison in mid-to late-July, this year we didn't see any evidence of color until just a few days ago. And it's still barely started. But now, if you head to one of our Syrah blocks, you don't have to look too hard to find veraison:

Veraison is a physiological stage of grape evolution where the berry stops accumulating mass and starts accumulating sugar. More visibly, red grapes start their color change from green, while white grapes take on more of a yellow tint. Both red and white grapes start to soften. [For more about what's happening chemically, check out this veraison post from the archives.] This landmark comes roughly six weeks before the onset of harvest, and gives us our best estimate for when harvest will begin. The most advanced Syrah cluster I could find has some berries that don't look all that different than they will at harvest:

It's important to note that this cluster is exceptional. Even at the top of the hills, most of the Syrah clusters are green (you can see this in all the other clusters in the above photo). At the bottom of the hills, there's very little color change to be found. And as for the other grapes, I couldn't find any red in any of them. This Mourvedre cluster is just one example; I could have pointed the camera just about anywhere and shown you the same thing:

Although the "first veraison of the season" posts you're likely seeing from your favorite wineries may make it seem like veraison is a moment, like Christmas, it's probably better understood as a continuum, like winter, and first veraison is like first frost, or first snowfall. It will likely be several weeks before even all the Syrah clusters are red, and longer than that until late grapes like Mourvedre and Counoise finish coloring up. 

While six weeks is a good basic guide for the duration between veraison and harvest, it's not totally constant, and can be influenced by the weather that we get in the interim, as well as by the amount of fruit the vines are carrying.  For example, 2007's first veraison was in mid-July, but relatively light crop levels and a very warm August produced a beginning to harvest before the end of August. By contrast, in 2010 a veraison ten days later than 2007's (July 30th, just like this year) was compounded by a very cool August, and we started harvest after the mid-point of September, three weeks later than we had in 2007. The last dozen years are compiled in the chart below, with each year linked to my blog post about that year's veraison:

Year	First Veraison Noted	Estate Harvest Begins	# of Days
2007	July 20	August 28	39
2008	July 23	September 3	42
2009	July 20	September 1	43
2010	July 30	September 16	49
2011	August 5	September 20	47
2012	July 25	September 5	42
2013	July 17	August 26	40
2014	July 9	August 23	45
2015	July 18	August 26	39
2016	July 13	August 18	36
2017	July 20	August 30	40
2018	July 29	September 101	42
2019	July 30	?	?

Using the range of durations between first veraison and first harvest (36 to 49 days) we can have good confidence that we'll begin picking sometime between September 4th and September 17th. The weather between now and then will determine where in the range we'll fall. 

What's next for the vineyard? We'll watch the different grapes go through veraison. Syrah will likely be followed by Mourvedre and Grenache soon, and Counoise a bit later. White grapes too stretch out across a continuum; in fact, Viognier has already started veraison, according to Jordy, although the visible changes are subtle enough that a photograph doesn't really show anything. Vermentino and Marsanne will move into veraison on the earlier side, Grenache Blanc and Picpoul in the middle, and Roussanne bringing up the rear, as usual. It's an exciting time, and the view changes daily. We'll be posting regular photos of veraison's progress on our Facebook, Twitter, and Instagram pages. In the cellar, we're finishing up the last of the year's bottling, and starting the process of pulling out and cleaning all the tanks, barrels, and equipment we'll be using once harvest begins.

I'm not sure whether veraison really marks the beginning of the end of the growing season. But it does at least seem to mark the end of the beginning. The countdown clock is ticking, and we now know -- roughly -- how much time is on it.

Footnotes:

1. OK, we picked our first Viognier on August 31st. But we didn't bring in any estate reds off the property until September 10th, so I'm going with that date.