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The following post is copied from Ancient Peaks co-owner and viticulturist Doug Filipponi's contribution to the Paso Robles Grower Blog. Click here to check out this regional blog and to keep up with the growing season across Paso Robles.
The 2014 vintage is officially underway in our estate Margarita Vineyard and across the Paso Robles region with the recent advent of “bud break,” the process whereby the buds on the vines open up and burst forth with fresh green growth.
Vines that looked dormant and skeletal just a few weeks ago now look very much alive, and the growing season is upon us. As we head into April, the new growth is taking shape as spindly shoots, small leaves and tiny flowers. Later this spring, the flowers will self-pollinate and set the crop for the 2014 vintage.
This year, bud break has arrived about a week earlier than average, due to a dry and relatively warm winter, as well as picture-perfect spring weather in mid-March with temperatures reaching the mid-80s for a few days. In other words, there was nothing holding the vines back from getting the show on the road.
As always, the priority right now is to protect the delicate new growth from frost damage. As you may know, Paso Robles is blessed with beneficial “diurnal” temperature swings. Temperature differences of 40 and even 50 degrees are not uncommon within a 24-hour period during the heart of the growing season. The warm days enable the fruit to develop rich, ripe flavors, while the cool nights help maintain balance and structure – all hallmarks of the wines of Paso Robles.
In the spring, however, those temperature swings can take us all the way below freezing by morning time – and once the mercury dips below 32-degrees, it can spell trouble in the vineyard. If left unchecked, frost can throttle the new growth and the vine will lose its new leaves and flowers.
Therefore, vineyard crews must be alert and vigilant whenever there’s a chance of frost – and they must act quickly to turn on the frost control systems when necessary. At Margarita Vineyard, we have five weather stations to warn us of low temperatures throughout the vineyard. We use targeted pulsator sprinklers during frost events. These pulsator sprinklers are trained on the cordons, coating the vine with a fine spray. The water freezes around the new growth and creates a protective barrier from outside temperatures that dip below 32 degrees. When ice is forming, it creates heat. It also creates heat when it’s melting. So yes, ironically, we use ice to protect the vines from frost damage!
Mother Nature has done her job once again, and the vines are fully awakened. It’s now our job to protect what we have been given. Looking forward, we are bullish on the 2014 vintage in Paso Robles. There’s still a ways to go, but we are off to a good start.