Saltwater Intrusion Zone (SWIZ) Agriculture at
Cohansey Meadows Farms
At Cohansey Meadows Farms, we are proud to be pioneers of Saltwater Intrusion Zone (SWIZ) Agriculture. Rather than abandoning acreage impacted by localized sea level rise and tidal flooding, we developed a framework that transforms vulnerable, brackish transition zones into productive, ecologically vibrant ecosystems. SWIZ agriculture was first conceptualized and put into practice right here on our land, offering a sustainable blueprint for the future of coastal farming.
Our journey began in 2019 with initial on-site experimentation. Spurred by shifting soil salinity, we began our first trials with Spartina patens (salt hay) - a resilient crop that has been continuously produced on this very land since pre-colonial times. By focusing on this historically vital species, our early work laid the groundwork for a scalable, closed-loop agricultural model that balances modern commercial production with strict coastal conservation standards. Today, we utilize these advanced cultivation techniques to produce an expanded palette of critical high marsh species, including:
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Saltmeadow Cordgrass (Spartina patens)
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Seashore Saltgrass (Distichlis spicata)
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Black Grass (Juncus gerardii)
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Big Cordgrass (Spartina cynosuroides)
To understand our farming methods, it helps to understand the challenge we are solving.
Normally, coastal land relies on a steady supply of fresh water from rain and underground aquifers. However, as sea levels rise and coastal storms become more frequent, heavy tides push ocean saltwater further inland. This saltwater seeps directly into the groundwater and forces its way into agricultural soils.
When salt invades farmland, it creates a hostile environment for traditional crops like corn, soybeans, or vegetables, which cannot tolerate salt. The soil becomes toxic to these plants, dehydrating their roots and leaving behind bare, vulnerable mud flats. Saltwater intrusion essentially turns productive fields into "ghost lands" where traditional farming is no longer possible.
Our SWIZ agriculture flips the script: instead of fighting the salt or abandoning the land, we adapt by growing native, salt-loving plants that naturally thrive in these changing conditions.
What is Saltwater Intrusion?
The Spartina Patens Saltwater Intrusion Initiative
Our efforts reached a critical milestone when we were awarded a USDA NRCS Conservation Innovation Grant (CIG), formally titled the Spartina Patens Saltwater Intrusion Initiative. Through this initiative, we proved the viability of native grass propagation at a commercial scale under real-world increased salinity conditions.
The SWIZ Advantage:
Plant plugs produced via SWIZ agriculture are fundamentally different from those grown using traditional greenhouse or upland nursery methods. By cultivating our crops directly within the biological realities of the saltwater intrusion zone, we produce a superior product for restoration and conservation projects:
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Pre-Conditioned Halophytic Resiliency: Traditional nurseries grow plugs in controlled, freshwater environments using artificial fertilizers. When those plugs are installed into brackish or saline restoration sites, they can experience transplant shock. Our plugs are grown in natural saline conditions, meaning they are already physiologically adapted to high-salinity stress from day one.
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Superior Root Architecture: Cultivated in local coastal soils and exposed to natural tidal influences, our plants develop aggressive, dense root systems designed to anchor quickly. This results in drastically higher survival rates and accelerated site stabilization upon installation.
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Ecological Synchronicity: Because our plants are grown in outdoor, localized transition zones, their growth cycles are perfectly synced with the regional climate and seasonal shifts of the Mid-Atlantic coast, ensuring immediate biological integration.