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Contact Us

Humboldt Ag Supply can help you grow. Get in touch to schedule your soil test, set up an account, or explore our products.

Toll-Free

855-707-Farm

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Custom
Solutions

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When off the shelf is off the mark, we provide scientifically formulated amendments and soil blends tailored to your growing style, microclimate, and varietals. Custom amendments and soils can help you streamline your nutrient management — reducing labor and the potential for human error. All the ingredients come pre-blended, so you won’t need to weigh, measure, or meter out individual materials.

We start by testing your soil with our partners at DBS Analytics. With that lab data as our guide, we'll create your blend with an emphasis on sustainable materials that promote water conservation.

When you order, you’ll have option of certified organic blends, available exclusively using OMRI (Organic Materials Review Institute) and OIM (Organic Input Materials) certified inputs.

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Order Yours

Stop by, send a note, or give us a call to get started. Our custom blends come by the yard, or in bulk by the transfer truck to reduce waste, packaging, and shipping costs.

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Humboldt day

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On the Ground

Prep your starts early to beat the spring rush. Once your greenhouse is at capacity, identify and implement a pest management strategy that will keep your garden happy and healthy.