herbicide-free case studies

- CASE STUDY V -

ESTATE VALLEY FLOOR

Vineyard area:

44 acres

Site Characteristics:

Rolling hills. A few rocky areas. Some side-slope where it’s too narrow for a tractor.

Tools/Equipment used:

Handheld gas-powered weed wackers used just after weeds germinate
Gramegna tractor-mounted in-row tiller. Challenges: Slow & one-sided
Shovel
Piloting a few weed-trimmer attachments

Passes:

1 - 2 passes depending on growing season conditions

Organic Herbicides?

Tried but were expensive, ineffective, and felt their use was moving away from why we’re organic in the first place.

GRAZING?

Hire sheep before bud break (Kaos)

Tillage?

Currently, some blocks are no-till and some alternate till. Goal to be entirely no-till. Even in a dry year we didn’t see a drop in yield in no-till blocks.

Weeds of concern?

Some of the very aromatic we don’t want in the fruiting zone (e.g., hit Mare’s Tail with a targeted shovel pass). Johnson grass - tall, vigorous and deep-rooted - do worry about competition.

Aesthetics?

Fair tolerance for weeds in the vineyard. Mostly dead or dormant for core vineyard management. Some dead/dormant weeds are also shading out further weed growth.

Certification(s):

Organic
Regenerative Organic

COSTs:

Annual farming costs/acre ~$12,000

Weed Management Costs:
Suppress (organic herbicide): $138.57/pass
Gramegna: $141.06/pass
Weedwacker: $119.70/pass ​​
Yearly Weed Management Cost/Acre =$400/acre

Soil, Straw & Salmon! As harvest winds down in Napa Valley, vineyard stewards are hard at work implementing critical fall erosion control measures. 

From planting cover crops to spreading straw on steep slopes, these efforts protect vital topsoil and help restore the health of the Napa River watershed. Read our latest blog post to learn more about how vineyard management can support our local ecosystems.

#sustainablefarming #erosioncontrol #napagreen #regenerativevineyard
25 1
One of our favorite field trips is a behind the scenes tour at the impressive facilities of @napagreen partner, Napa Recycling & Waste Services. 

Visiting a recycling center helps teach how waste is sorted, gain insight into the equipment and procedures, and helps support community sustainability. 

Join us on Oct 10, 2026 for a tour of @naparecycling to discover how waste from local homes and businesses is sorted, composted, and recycled.

Come see the process in action - register today on Eventbrite!

#recycle #recycling #ReduceReuseRecycle #Sustainability
21 5
Join us for our most requested workshop! 

This is a great opportunity to bring your team and discuss the benefits and limitations of various undervine weed management implements and more.

With demonstrations from:
🍇 @napafarmingcompany - new hydroweeder + other tools
🍇 @clemens.info - no-till seed drill plus other equipment
🍇 @pellencamerica - Under Vine Cultivator (UVC)
🍇 @sagarobotics - Thorvald Autonomous UV Robot for mildew & botrytis 
🍇 TWE - team approach to weed management

Join us Thursday, October 29, 2026 at BV 10. Bring your tractor operators! There will be Spanish support.

This event is kept free by generous sponsorship from Napa Farming Company and Saga Robotics.

#regenerativeag #regenerativeviticulture #napagreen #vineyardmanagement
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The Napa Green team and board support Measure B, the Napa County Wildfire Preparedness, Watershed Protection and Open Space Preservation Act of 2026. 

This measure aligns with our mission to protect Napa County’s environment, strengthen vineyard ecosystems, and build community resilience. 

Join us in voting YES, on Measure B!

#climateaction #community
73 7
Visiting @domainecarneros, a @napagreen certified winery, is an unforgettable experience. Renowned for their méthode traditionnelle sparkling wines and estate-grown Pinot Noir, they stand as a beacon of sustainable winemaking set within a fairytale landscape.

Book your visit today to share this experience. 

#sustainablewine #winetasting #regenerativevineyard #napagreen #visitnapa
64 6
It takes a lot of tacos to fuel sustainability in Napa (shout out to @ilovelacheve)!

While our members have been busy with harvest, the @napagreen team has been working hard behind the scenes, planning workshops, working on grants, coordinating @risewinesymposium 2027, and documenting the hard work our growers and vintners are putting into a superb 2026 vintage.

#greenteam #napagreen #greenbusiness #wineindustry
60 3
A visit to @napagreen certified @younginglewood is an opportunity to slow down, and enjoy art, nature and terroir driven wines. 

Book your Young Inglewood tasting today to discover an unforgettable experience right in St. Helena.

#winetasting #sustainablewine #visitnapa #visitnapavalley
32 4
We love HopeTape because it is a 100% soil-compostable, microplastic-free tie tape designed to replace traditional plastic tape in the vineyard and eliminate the  microplastics that traditional tape leaves behind in your soil. 

Head over to @ajvineyardsupplyinc to grab a sample (or a case) to test it in your vineyard. 

#regenerativevineyard #greenbusiness #sustainablewinery
58 5
Today we celebrated community cover crop seed pickups! 🌱 

The #OneBlockChallenge brought together growers in Napa County to place a collective bulk cover crop seed order from @greencoverseed based on the differing needs of vineyard sites. Thanks to this community initiative supported by @napagreen and @regenerativeviticulture growers were able to greatly reduce shipping costs and get high quality inoculated cover crop seed. 

Thanks to Treasury Wine Estates for hosting! 

#regenerativeviticulture #covercrop #regenerativeag #grassroots
77 1
Check out this great article by Tonya Hennessy in @fwtmagazine. A great way to explore the diversity of offerings in Napa County! 

#visitnapa #sustainablewine #winetasting #explorecalifornia #visitnapavalley
15 1
🥂 Wine Tasting itinerary!!

Check out our final amazing wine tasting itinerary for August at @cakebreadcellars, @bellaunionwine and @raymondvineyard! 

Get the @napagreen Passport to enjoy these perks:

2-for-1 Classic Cakebread Tasting, M-Th @cakebreadcellars 
$50 off your visit @bellaunionwine 
2 for 1 Tasting @raymondvineyard 

Discover 15 Sustainable Napa Valley Wineries This August with your Napa Green Tasting Passport available for purchase at the link in our bio. 

#winetasting #winepassport #visitnapavalley #napavalleywine #sustainablewine
21 4
Heat pumps are highly efficient, energy-saving alternatives to traditional gas-powered water heaters, offering wineries a way to significantly reduce emissions and operational costs. By utilizing renewable electricity and potentially qualifying for @mcecleanenergy rebates, these systems provide a sustainable and cost-effective solution for essential water heating needs. 

Learn more in the latest blog from @napagreen. 

#climateaction #energyefficiency #sustainablewinery
18 0
🥂 New Wine Tasting itinerary!!

Check out this stunning day of wine tasting @vsattui, @bvwines and @rutherfordhillwinery. 

Get the @napagreen Wine Tasting Passport to enjoy these perks:

🍇 2 for 1 seated Mercato or Outdoor Tastings @vsattui 
🍇 50% Discount on The 1885 Tasting @bvwines 
🍇 2 for 1 View of the Valley tasting @rutherfordhillwinery 

Discover 15 Sustainable Napa Valley Wineries This August with your Napa Green Tasting Passport available for purchase at the link in our bio. 

Don’t forget to follow along for more certified sustainable, Napa Valley wine tasting itineraries. 

#winetasting #winepassport #visitnapavalley #napavalleywine #sustainablewine
25 3
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