By Lori Budd of Exploring the Wine Glass
When you walk through Downtown Paso Robles on a warm July afternoon, it’s easy to focus on the lively tasting rooms, outdoor patio dining, and cold glasses of Rosé or your favorite white. But just a few miles outside downtown, across the rolling hills of the Paso Robles AVA, a high-stakes transformation is underway.
July in the vineyard is often called the “calm before the storm”. Harvest isn’t here yet, but the work done under the midsummer sun over these four weeks will directly define the structure, balance, and aroma of the wine in your glass two years from now.
Here is what is happening behind the scenes in Paso Robles vineyards during the month of July.
(Veraison shown in image above.)
Veraison: The Great Color Shift
If you take a stroll through the vine rows in mid-to-late July, you’ll witness one of nature’s most striking visual shifts: veraison (pronounced vuh-RAY-zhun).
Up until July, grape berries are hard, small, dark green, and packed with mouth-puckering acid. During veraison, the vine shifts its energy from growing shoots and leaves to ripening its fruit.
- The Transformation: Red grape varieties soften and shift from emerald green to shades of ruby, violet, and deep purple. White grapes turn from opaque green to translucent, golden hues.
- The Chemistry: The berries expand, accumulation of sugars skyrockets, and harsh malic acids begin to break down. Anthocyanins, the compounds responsible for color and antioxidants in red wine, begin to synthesize in the skins.
Canopy Management & “Sunlight Sculpting”
Paso Robles is famous for its dramatic summer heat spikes, often followed by cool evening breezes coming off the Pacific Ocean through the Templeton Gap. Managing that scorching July afternoon sun requires meticulous canopy work.
Vineyard crews spend July hand-adjusting the vine’s leafy canopy:
- Leaf Removal (Leafing): Workers selectively pull leaves around the fruit zone. Crucially, they usually strip leaves on of the vine canopy to allow gentler morning sunlight and air circulation (which wards off mildew).
- Shade Strategy: Choosing which leaves remain in order to shield the fragile young berries from intense 95°F+ afternoon heat waves that can sunburn or raisin the grapes.
- Lifting Wires: Using Vertical Shoot Positioning (VSP) systems, crews manually raise catch-wires to keep shoots growing upright rather than flopping over and creating dark, humid shade pockets.
The “Green Harvest”: Sacrificing Quantity for Quality
This is so important even though it sounds counterintuitive to intentionally clip perfectly good grapes off a vine and let them fall to the dirt, but July is prime time for a green harvest (or cluster thinning).
If a grape vine carries too many clusters, its resources (water, nutrients, and photosynthetic sugars) get diluted across all the fruit. In July, viticulturists inspect each block:
- They count the clusters per vine and gauge cluster size.
- If a vine is overburdened, workers clip off slow-ripening or overcrowded cluster.
- The remaining clusters receive 100% of the vine’s focus, resulting in richer colors, more concentrated flavors, and better structural complexity in the finished wine.
Precision Irrigation & Pest Protection
July is typically bone-dry in Central Coast California. While grapevines are resilient deep-rooted plants, young grapes need precise moisture management during peak summer heat.
- Drip Irrigation Tuning: Vineyard managers monitor soil moisture probes and leaf moisture stress to apply tiny, targeted drips of water—just enough to keep the leaves green and photosynthesizing without spurring wild, runaway shoot growth.
- Netting Against Wildlife: As grapes sweeten during veraison, local wildlife takes notice. You’ll see crews rolling out fine protective mesh netting over the fruiting zones to keep hungry birds from devouring the crop before harvest.
From Vineyard Soil to Downtown Glasses
While winemakers in the cellar are busy pressure-washing crush pads, topping off barrels, and prepping equipment for the harvest rush just weeks away, the real magic of July belongs to the vineyard crews.
Visiting Downtown Paso Robles this month? Toss out some questions about these July happenings in the vineyard. Your winery host will be ecstatic to share!
About Lori Budd
With a passion for wine that bubbles like the finest Champagne, Lori Budd is a wine educator who loves bringing the joys of vino to others. A certified Spanish Wine Scholar and WSET Level 2 Award holder, Lori has mastered the nuances of wines from Albariño through Zinfandel. As a champagne specialist, she can sabrage a bottle open with flair while explaining what makes the region unique. Lori founded Cabernet Franc Day to spotlight this oft-overlooked Bordeaux variety. Based in Paso Robles wine country, she is dedicated to promoting the extraordinary region. When Lori pours, good times are sure to flow; she promises to never tell you what to drink, but she’ll always share what’s in her glass. Follow along her journey through her award winning blog and nationally ranked podcast; Exploring the Wine Glass.
