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Bud Break 2020 – It’s Happening!

by Johnathan James | Published April 23, 2020

What is Bud Break

There is no mistaking it—bud break is that glorious moment that happens in the vineyard each spring as the vines wake up from their winter dormancy. All winter long, grapevines stood lifeless and bare, but as the temperature rises and the days lengthen, they are suddenly bursting with vitality. They draw on the energy they’ve stored deep within their trunks and roots through the winter to push out the first green leaves of a new growth cycle. But what is bud break (also known as bud burst)?

Having been tightly packed and protected all winter, these tiny and sparse leaves have but one goal—to restart photosynthesis and generate new energy. Now the vine is no longer dependent on the minimal energy reserves it tucked away to get through the winter months.


When Does Bud Break Occur?

Bud break appears first in the chardonnay vineyards in mid-March, but during warmer winters (like 2012, 2013 and 2014), chardonnay bud break can happen as early as mid-February. The last varietal to break buds is cabernet sauvignon, which typically happens up to three weeks later than chardonnay. Like magic, you’ll see entire vineyards turn from drab brown to vibrant green as those first leaves begin photosynthesis, pushing out more and more leaves in what is termed “rapid shoot development.”