Norcal Ag - We Grow It Greener

Soil Amendments, Topsoils, Bioretention soils and more - delivered in bulk throughout Northern & Central California

Best Practices

Communities We Serve

Norcal Ag Service provides bulk organic soils, soil amendments and farm supplies like compost, chicken and cow manure, gypsum, limestone, organic fertilizers, biotreatment soil, road dust control, and other soil stabilization services and products to all of central and northern California communities, including Napa, Sonoma, Healdsburg, St. Helena, Stockton, Modesto, Merced, Sacramento, Woodland, Yuba City, Lodi, Livermore, and more.

Learn More About California Soil

Norcal Ag Service takes our soil science and knowledge seriously. We've put together a resource that will teach you everything you need to know about northern California soil.

Helping our ag Community

We Support!.

Check out our Facebook page for the latest ag news and Norcal Ag Service updates!

Organic Soils & Composts For Spring, Summer and Fall

Take care of the soil that takes care of you....

Norcal 'Filter Green' Certified BioTreatment Soil

Top rated Premium Certified bioretention soil  (biosoil) constructed with specialized glacial sub angular sand providing maximum stability and longevity with optimum filtration rate.

Agriculture Education

Our information center for all things related to agriculture, farming, soil, and more. Each resource contains practical insights to help you stay knowledgeable and up to date on all things ag. 

What does Sulfur do for Crops?

By Norcal Ag Service

Properly balanced PH levels can mean the difference between large yields, and crop failure. Overly acidic soil produces smaller crops that simply don’t satisfy the…

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gypsum and plant growth - norcal ag service

What is Gypsum and How Does It Impact Crop Growth?

By Norcal Ag Service

Gypsum and lime have been used for ages to improve soil and balance PH levels (in the case of lime) to get the land in…

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Compost, manure, or fertilizer - norcal ag service serving all of northern and central california

Manure, Fertilizer, Or Compost—Which is Best? It Depends.

By Norcal Ag Service

Successful farmers know the value of their soil. They know that good soil means good crops, a good end of the season yield. They know…

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Thank you to our customers!

Norcal Ag Service is a northern California small business that offers organic farming supplies and organic soil amendments an road dust control and soil stabilization services to our Ag community, not a multi-billion dollar chemical company so we would like to thank some of our customers because our jobs TRULY do depend on Ag.

Clos du Val winery - Atlas Vineyard Management - Pacific Gas & Electric - Ducks Unlimited - Paul Hobbs Winery - Stagecoach Vineyards - Silver Oak Winery - Nutty Tree Farm - Kruppa Farms - Caymus Vineyards - ZD Wines - Chalk Hill Winery - Georgia Pacific - Sequoia Grove Winery - Sunseri Vineyards - Big Ranch Farms - Annapolis Winery - Maggiora & Ghilotti - Napa County - Putah Creek Hopps - Rare Earth Landscape Supply - Reynolds Family winery - Ohara Farm Company - Hydeout Farms - Hansen Brothers - McMannis Vineyards - Pine ridge Vineyards - Van Duyn Farms - Ballatore Farms - Antinori Vineyards - Kendall Jackson Family Vineyards - Renteria Vineyard Management - Golden Bear Ranches - Hill Wine Company - Nunez Vineyard Management - Rawah Vineyards - Peterson Ranch - Pippitt Ranch​ - Gordon Valley Ranch