top of page
Sponheim Sales&Services17.jpg


* Cover Crop Seed Sales

* Custom Seed Cleaning

* Line Up Aerial Application

* Line Up Custom Drilling

* Custom Interseeding

* Contract Local Oats/Cereal Rye Seed Growers

Our Mission:

Sponheim Sales and Services strives to promote the adaptation of conservation practices: cover crop and strip/no tillage, by providing individualized customer service, knowledge, and products for farmers, growers, and retailers.


 Dean Sponheim is a fourth generation Mitchell County Farmer, located southwest of Osage, IA. He owns and operates the family’s Century Farm with wife, Cindy, and his son, Josh.  He started farming in 1979 with his father and brother. Dean became a Pioneer Sales Rep in 1995 and is currently still running the Pioneer business with Sales Associate, Rachel Amundson. Dean started many different farming practices for reasons other than conservation. He began strip tilling in 1999 and in 2004 started a custom strip till business. He began strip cropping in 2011. Dean started aerial applying cover crops in the fall of 2012 and in 2014 along with son, Josh, and co-worker, Rachel, started a cover crop seed business, Sponheim Sales & Services. He is a member of the Rock Creek Watershed Advisory Board. In 2014 the board, with the assistance from the Iowa Soybean Association, developed the first watershed project plan in the state of Iowa based on the Iowa Nutrient Reduction Strategy Goals. Since 2014, Dean has shared his story to many groups. Dean has hosted and presented at many field days across Iowa and Minnesota. His real passion is helping producers work through the psychological challenges when implementing “Change”.  

Rachel Amundson grew up on a family farm near Osage, IA where she now farms with her husband and brother.  The family farm has a long history of using conservation tillage and cover crops. 

Rachel is a graduate of Iowa State University with degrees in Agricultural Studies and Agronomy.  Prior to moving back to the Osage area, Rachel worked as a Precision Ag. Specialist in North Central Iowa.

Rachel and her husband Alec have 2 young daughters, Nora and Julia.  In their spare time they enjoy kayaking and spending time outdoors with family.

Josh Sponheim grew up on his family farm near Osage, IA.  Josh graduated from Iowa State University in 2004 with degrees in Agricultural Studies and Agronomy.  Josh spent 7 years working in Agronomy retail in both the Cooperative and privately owned Ag business's.  In 2012, Josh began working in the Precision Ag department for a Cooperative in East Central Iowa.  Wanting to be back on the family farm, Josh made the jump to Premier Crop Systems in 2014, continuing to do Precision Ag.  Josh and his dad farm together on their land.  Josh recently became a father to son, Kole.   

Tracy Church grew up in Missouri - so don't bother asking if she is a Iowa or Iowa State Fan!- and is the proud mother of daughter Kenzie and son Kyler.  She attended University of Central Missouri before moving to Iowa.  After moving to Northern Iowa she worked for the USDA - Farm Service Agency.  Tracy transitioned to working for the Mitchell County Soil & Water Conservation District as the Project Coordinator for the Rock Creek Watershed in the Natural Resources Conservation Service office.  In the coordinator role, Tracy was involved with assisting producers and landowners with adapting conservation practices on their land.  Practices implemented included cover crops, strip/no tillage, streambank stabilizations, wetlands, and edge-of-fields (bioreactors/saturated buffers).

bottom of page