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

Thanks to @grgichhillsestate for hosting our Cover Crop Workshop last month in collaboration with @regenerativeviticulture. 

We had an incredible time in the vineyard exploring cover crop with @greencoverseed. 

Cover crops are essential for managing soil health, erosion control, increasing biodiversity, and a bunch of other benefits including greens for lunch! 

#regenerativevineyard #oneblockchallenge #napagreencertified #covercrop
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Explore @tressaboreswinery with Julie Johnson and learn about their commitment to sustainability, biodiversity, and creating a gorgeous habitat that is teeming with life. 

#regenerativeviticulture #regenerativeag #climateaction #womeninwine
232 9
In 2023 @napagreen certified member @dominusestatewinery did an LED retrofit with @mcecleanenergy saving an estimated $14,500 per year with an additional $5,800 incentive. 

Read more at the link in our bio. 

#energyefficiency #climateaction #wineindustry
11 1
We’re thrilled to announce the new @napagreen Board Chair, Molly Sheppard, who is the VP of Winery Strategy @spottswoodewinery, a leader in sustainability. 

@mkshepp’s dedication to sustainable practices and ongoing support of the Napa Green community make her the perfect fit for this leadership role.

We’re grateful for an amazing board of industry leaders and advisors who bring diverse perspectives, expertise, and passion for climate action to support the success of Napa Green and our members!

#womeninwine #wineindustry #nonprofit
166 22
We all know that sheep are the cutest but why are they in so many vineyards? 

Cori Carlson, owner of @napapastureprotein shared the ecological goals of grazing a vineyard, along with this one key takeaway at our recent @napagreen workshop. 

🐑 🐑 🐑 

#woolyweeders #regenerativevineyard #soilhealth
93 8
Join us on April 9, 2026 @charleskrugwinery to explore climate smart opportunities, sustainable glass, closures and more ways to green your supply chain.

We will share case studies, hear about climate-smart and alternative packaging, clarify what materials are truly recyclable, and identify new ways to divert more waste from the landfill. 

With speakers from Verallia, @naturalcorkcouncil, @cork_supply, Treasury Wine Estates, @freeflowwines, @revinobottles, @keystonecapsules, Wine Industry Zero Waste Collective, @naparecycling and more! 

➡️ ticket link in bio!

#winebusiness #wineindustry #supplychainmanagement
17 1
Discover four exceptional wineries united by a commitment to sustainability, community, and thoughtful hospitality.

These wineries are not only @napagreen certified but also @bcorporation certified, and through their “B Collaborative” partnership this month, they are offering a special tasting experience: wine club members receive two complimentary tastings, and non-members can enjoy a two-for-one tasting. 

Learn More by visiting these wineries. 

@artesawinery 
@cliffamily 
@spottswoodewinery 
@troisnoixwine 

#winetasting #visitnapavalley
66 6
Learn why Natalie Bath, Winemaker at @ruddestate considers @napagreen an important part of their commitment of land stewardship.

#SoilHealth #WomenInWine #RegenerativeViticulture
102 15
@napagreen has had a number of growers looking for organic solutions to dealing with nematodes where vines are planted. Our partners at @lallemandplantcareusa have an OMRI approved biological solution. 

Learn more in this short video!

#soilhealth #vineyardmanagement #wineindustry
19 1
Join us March 17th @grgichhillsestate to connect with cover crop expert Keith Berns, with @greencoverseed, and experienced viticulturists, to leans how you can incorporate soil health practices in your vineyard!

➡️ Registration link in bio. 

#soilhealth #regenerativevineyard #covercrop
48 2
What is biochar and why is it so cool? 

Hear from @napa.char to learn more.

#climateaction #soilhealth #biochar
101 2
🐝 “If you build it, they will hum” - Erin Arnsteen, Western Program Coordinator @monarchjointventure 

We are grateful for everyone who attended our Biodiversity in the Vineyard workshop last week! It was an amazing day @grgichhillsestate filled with bees, birds, butterflies, a community passionate about biodiversity, and experts providing resources for building biodiversity in YOUR vineyard. 

#regenerativeag #biodiversity #worldwildlife #regenerativeviticulture
68 4
Join us in congratulating Megan Scott (@love.dream.breathe), our Operations Director, on 6 years at @napagreen. Megan’s positive attitude and “can do” approach to problem solving has greatly contributed to the success of Napa Green and our members. 

Thanks for your work and dedication to sustainability! 

📸 @brianamarieweddings 
📍 @trefethenfamily 

#womeninwine #womeninstem #climateaction
101 34
Thanks to the @naparegister for publishing this Climate Connection contribution from @napagreen’s Vineyard Program Director, Ben Mackie (@soilrainandhope) highlighting the biodiversity @grgichhillsestate. 

If you loved this article, you’ll love our Birds, Bees & Butterflies: Biodiversity in the Vineyard workshop happening today! 

#climateaction #regenerativeag #regenerativeviticulture
58 2
Friday night dinner dilemma?

Order takeout from @southsidenapa using promo code DONATE and 20% of your order will be donated to @napagreen. 

It’s a win: win! You get dinner and @napagreen gets funding to contribute our impactful climate action work in Napa Valley.

Order online or preorder your Fried Chicken Friday pickup for February 27, 2026. Don’t forget to pair it with Napa Green certified wine! 🍽️ 🍷 

#dineanddonate #nonprofit #napavalley
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