After our very wet beginning to 2017, I was hopeful that we'd see a delayed start to the growing season, at least compared to the past couple of years. But after a chilly beginning to March, including frosts 5 out of the first 7 nights, we got a very spring-like two-week stretch starting March 8th, with sun, no frost, and consistent days in the upper 70s and low 80s. So, it wasn't a total surprise when I got a photo from our viticulturist Jordan Lonborg with a photo of a sprouting Grenache Blanc vine on March 13th:
Budbreak, as you probably guessed from the name, is the period when the grapevine buds swell and burst into leaf. It is the first marker in the growing cycle, a point when we can compare the current season to past years. Upcoming markers will include flowering, veraison, first harvest, and last harvest.
Budbreak isn't uniform. Different grape varieties sprout at different times, just as they ripen at different times. On a ramble out through the vineyard today, there were several grapes that were out significantly, including Grenache Blanc (unsurprisingly), Viognier, Vermentino, and Grenache (below):
By contrast, our later-budding grapes like Roussanne, Counoise, Mourvedre and (this year, at least) Syrah are still mostly or entirely dormant. This Counoise block is just down the hill from the Grenache block I photographed above, without a green sprout in evidence:
While this year is two weeks later than our record-early 2016, it's still on the early side historically: tied with 2014 and 2015 as our second-earliest in the last ten years:
2016: Very end of February
2015: Second week of March
2013: First week of April
2011: First week of April
2010: Last week of March
2009: Second week of April
2008: Last week of March
2007: First week of April
Why was this year still relatively early, when other recent wet years like 2010 and 2011 were two weeks or more later? It turns out that this winter, while it was wet, wasn't really that cold. Normally, in California, the two go together, as the clouds that bring the rain also limit the ability of daytime temperatures to rise out of the 50s. But most of our storms this winter were relatively warm, of the "pineapple express" or "atmospheric river" variety originating in the South Pacific waters near Hawaii. And most of the cold weather came early, with 32 of our 41 below-freezing nights coming November-January. The graphic to the right shows that most of San Luis Obispo County was on the warm side of average, historically. (It, and a great explanation behind the data, come from Daniel Swain's must-read blog Weather West.) Click on it for a larger view.
While budbreak always feels hopeful, it also comes with a certain degree of risk. Dormant vines can freeze without danger, but new growth is susceptible to freezing; April frosts cost us roughly 40% of our production in both 2009 and 2011. And we can receive frosts here in Paso Robles all the way into early May. So far, we've avoided anything damaging, and the medium-term forecast doesn't look too threatening. But we've still got more than a month to go before we can feel safe.
Still, it's hard to feel too apprehensive when there is so much life springing into visibility around you. Please join me in welcoming the 2017 vintage.