Crops and Soils


Sterling's milk derived fertilizers, amendments and biologics

Why milk?

 Bill & Becca Selkirk, founders of Sterling Agriculture, Inc. are also organic farmers. The backbone of Sterling's client base is organic dairies. Bill Selkirk stated " We can no longer just stand idle and watch the dairy farmer, our friends and clients, struggle through the latest downturn in the dairy industry. It is now a crisis affecting not just an industry, but families and communities. We Must Do Something ! "  - A mission objective was born that drove the creation of a line of fertilizer's, amendments and biologics that use organic milk as it's base ingredient. The entire product line " Starts at the dairy and ends at the dairy". That creates a true circle of sustainability and more importantly, a way to keep milk flowing in the markets.

More about milk (pdf)


Black Nitrogen 6-2-2 Plus Ca 2.0

Sterling's fertilizer with amendments and beneficial microbes

  • Milk derived Nitrogen for easy uptake

  • Soil microbes to maximize available nutrients 

  • Humic/Fulvic acids to maximize efficacy of fertilizer

  • Kelp for minerals, vitamins and growth enhancers

  • Milk and plant derived amino acids to increase Brix

Please contact Sterling for complete information

Sea Milk

Sterling's kelp and milk derived amino acids

  • Provides key minerals, vitamins and enzymes

  • Enhances protein synthesis

  • Optimizes flowering, fruit setting and growth

  • Prevents blossom abortions

  • Maximizes overall quality of crops

Please contact Sterling for complete information

Black Inoc

Sterling's milk based microbial inoculant

  • Beneficial microbes for soils and plants

  • Enhances release and mobilization of nutrients

  • Stimulates enzymes to enhance plant growth

  • Fixes Nitrogen in plant available forms

  • Enhances uptake of Phosphorus

Please contact Sterling for complete information

More about Black Nitrogen (pdf)


More about Sea Milk (pdf)


More about Black Inoc (pdf)


Black Nitrogen Label (pdf)


Sea Milk Label (pdf)


Black Inoc Label (pdf)


OT Sucker Control

Sucker control for organic tobacco

  • QCS approved for organic tobacco farms

  • C8 - C10 activity from palm oil

  • Effective and easy to use

  • Enhanced with natural surfactants

  • Effective by direct contact with suckers

  • Safe on crops when properly applied

       Please contact Sterling for complete information

More about OT Sucker Control (pdf)