About Us

Family owned and operated, WRT is a California-based company focused on providing customized, effective, and sustainable agriculture solutions. With more than 40 years of farming experience behind all our decisions, you can trust that every product we offer has been selected to address the realities you face every day. Choosing WRT means choosing only high quality, thoroughly-tested products that improve plant health. Contact us today and we'll help you develop the perfect program to make your hard work count for even more.

John Witzke

Founder of WRT, John has been farming for over 30 years, successfully growing almonds, walnuts, peaches, and grapes. John’s family also owned a well-known and trusted agricultural laboratory for 20 years, creating familiarity with the issues facing farmers and guiding his research. John has developed customized strategies and sound, sustainable solutions to enhance crop management programs that help to increase quality and yields by promoting soil and plant health as well as decreasing costs for fertilizers.

Joseph Witzke

As a Certified Crop Advisor, Joseph advises growers and farmers about current agronomic practices and standards and helps to implement the customized strategies developed by his father, John. Joseph received his degree in Biological Sciences from CSU Stanislaus, and specializes in Nutrient Management, Water & Soil Management, and Integrated Pest Management.

Sara Witzke

A graduate of CSU Stanislaus with a degree in Agriculture, Sara is the WRT Office & Inventory Manager, ensuring a prompt and efficient response to all client needs, including order fulfillment and delivery.

WRT has deep roots

About Us

John Witzke

Joseph Witzke

Sara Witzke

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FAMILY.