Clemens Weed Knife
Pros: Lower soil disturbance, no soil inversion. High ground speed. The frame can also support a ‘twister’ type mower for a pre-knife pass, or a french plow for deeper disturbance. Single- or double-sided.
Cons: Low level of disturbance means weeds can re-sprout depending on timing and soil moisture. Not great with heavy weed cover. Can either be one sided (lower efficency) or, on flat ground, can have a second side, but might require multiple passes.
Pros: Ability to manage the entire vineyard floor, even steep, terraced, and tight rows, without fossil fuels. Increased nutrient cycling, as well as soil and vine health.
Cons: Require knowledgeable shepherds to be managed/rotated effectively. Small parcels are inefficient. Damage to vines and infrastructure is possible.
Organic (OMRI) Herbicides
Pros: Helpful as a foliar spray when the soil is too wet to cultivate. Reduces weed competition in unfavorable conditions
Cons: Organic herbicides do not match the effectiveness of synthetic herbicides, but are another tool in the weed management kit. They are ineffective once weeds have fully established root systems and can be expensive.
Note that feedback is assembled from members who have used these tools.
Thursday, December 7 · 4:30 - 6:30pm
St. Supéry Estate Vineyards & Winery Over snacks and wine, hear from Anna Brittain, Napa Green Executive Director, and the Napa Green team about recent program updates. There will be a panel with Ivo Jeramaz, Vice President of Vineyards & Production at Grgich Hills Estates and Steve Matthiasson, of Matthiasson Winery and Premiere Vit, talking about herbicide-free farming, approaches, costs/benefit and ROI.
Thursday, January 18
2:00 pm - 4:00 pm
Producers have been subjected to a rollercoaster recently- from an extremely early harvest in 2022 due to heat, to one of the latest memorable harvests in 2023 due to a cool growing season. Join us, along with industry-leading winegrowers and vintners, to discuss the 2023 season and the techniques in the vineyard and cellar that can aid in adapting to the new norm of climatic extremes.
Registration Coming Soon
Thursday, February 15, 2024 · 9am - 1:30pm
Inglenook Learn from Inglenook and others about equipment and tools being used for herbicide-free and organic weed management. See tools in action and ask questions. Then hear from Perennial Grazing about the the benefits of sheep in the vineyard, and the essential importance of proper management. In addition, hear from Sarah Keiser with Wild Oat Hollow about the use of goats for adjacent land management and fire fuel thinning. We'll look at a forested area and talk about potential prescriptions.
Location & Time TBD
One of the main resistances to phasing out Roundup is increased labor and equipment costs. With rising supply chain costs, the costs of herbicides and fertilizers have risen dramatically, so phaseout can offset increased labor costs. In addition, leaders like Grgich Hills Estate, a Napa Green member, have shown that regenerative organic farming can be cost-effective.
Not yet a Napa Green member? Learn more about our leading certification, including our boots-on-the-ground consulting services for regenerative farming, soil health, and irrigation efficiency.