At our estate vineyard in Calistoga, there’s a moment each spring that signals everything is beginning again.
After months of dormancy and careful winter work, tiny buds along the vine begin to swell. Then, almost overnight, they burst open—revealing delicate green leaves and the very first shoots of the new vintage.
This is bud break, and it marks the official start of the growing season in Napa Valley.
What Is Bud Break?
Bud break occurs when the grapevine awakens from dormancy and begins active growth. As soil and air temperatures warm, the vine draws on the energy it stored over winter, pushing new life outward from each bud.
For our Cabernet Sauvignon vines, this is the first visible step toward the vintage ahead. Each of these tiny shoots has the potential to become a cluster of grapes—making bud break one of the most meaningful milestones of the year.
Why It Matters
Bud break sets the tone for the entire growing season.
The timing of bud break influences:
The length of the growing season
The pace of vine development
The eventual timing of harvest
An earlier bud break can lead to an earlier harvest, while a later start can extend the season. Both have implications for how the fruit ripens and the style of the wine.
An Earlier Start This Year
This year, we’ve seen bud break arrive a bit earlier than usual in our Calistoga vineyard.
A combination of early spring conditions and a stretch of warmer temperatures over the past few weeks has gently pushed the season forward. It’s a reminder of how closely the vines respond to their environment—and how each vintage is shaped by the unique rhythm of the year.
Our recent shift toward earlier pruning has also supported this timing, helping guide the vines into the growing season slightly ahead of where we’ve been in past years.
Timing in Calistoga
In the northern Napa Valley, bud break typically occurs between late March and early April, depending on the weather conditions of the year.
In Calistoga, where we often experience warm days and cooler nights, the vineyard can move quickly once bud break begins. These temperature swings help promote balanced, steady growth—something especially important for Cabernet Sauvignon.
The Risks of Early Growth
As exciting as bud break is, it also introduces one of the most delicate periods in the vineyard.
Those fresh green shoots are incredibly fragile—and highly susceptible to spring frost. A cold snap at the wrong moment can damage young growth and impact the crop for the year.
That’s why this time of year requires close attention and, at times, protective measures in the vineyard. Every decision is about safeguarding the potential of the vintage while allowing the vines to grow naturally.
A Moment of Renewal
There’s something quietly powerful about bud break. After the stillness of winter, the vineyard feels alive again—full of energy, movement, and possibility.
Walking the rows in early spring, you can see the future vintage beginning to take shape in the smallest details. It’s a reminder that great wine is not just made at harvest—it starts here, with the first leaves of the season and the promise they carry.
Bud break may be just the beginning, but it is, without question, one of the most exciting moments of the year.