Delivering Trust Through Transparency

MySupply Live

Our Exclusive App

MySupply LIVE™, a proprietary app built by Gro Alliance, was launched for the 2013 crop year as the industry’s first tool for communicating contract seed corn production data to clients in real-time.

Data is collected by field scouts using iPhones and instantaneously shared with the internal field production staff at Gro Alliance, as well as production clients via an iPad. This commitment to full transparency creates an open and trustworthy relationship between Gro Alliance and its seed production clients that is unmatched.

Every activity from planting through harvest is recorded and reported in real-time, without a filter. Scouting locations and data are geo-located and time stamped to ensure data verification and confirm full-field coverage.


Seed Production

Seed Production • Organic Seed • Locations

Field Operations

Gro Alliance combines the most modern seed corn production practices with real-time data analysis, field alerts and practical seedsmanship to deliver on its clients’ needs. We have an outstanding network of growers and custom operators that operate under our regimented system for ensuring purity and industry-leading seed quality. Our unique expertise includes: Male row offsets, 4:2 planting pattern, defoliation experience, wide planting splits, and more.

Drying through Packaging

Since 2002, Gro Alliance has made dryer system improvements at every location with major dryer system upgrades and expansions in 2012, 2013 and 2014. These improvements give Gro Alliance one of the most modern suites of dryers in the nation. This technology allows for precise temperature and air flow control to maximize seed quality, no matter how sensitive the hybrid. During the conditioning, treating and packaging processes, Gro Alliance uses the most modern cleaning, sorting, sizing and handling equipment available. Further, seed must pass exacting standards at every stage that are process-controlled using an ISO 9001:2008 certified system. It is this attention to detail, and commitment to quality, that produces precision sized seed with uniform treatment coating for the best appearance in the bag.

Gro Alliance partners with high-quality organic growers to deliver superior yield and quality organic corn seed.  By combining our growers’ experience in organic production and our expertise in seed corn production, Gro Alliance is well positioned to support your organic corn seed needs.

Gro Alliance’s seed production locations represent three distinct environments to maximize the productivity and yield predictability for all hybrid combinations in your lineup.

The Cuba City, WI location accesses highly fertile ground around Cuba City as well as Dewitt, IA for high yield opportunity and the ability to produce very early hybrids (up to 75 day) with much less frost risk than more Northern locations.

The Howe, IN location accesses 100 percent irrigated ground in the Constantine, MI and Northern Indiana area that delivers consistent yield and maximizes production and quality of hybrids with poorer male inbreds or difficult-to-grow female inbreds.

The Mount Pulaski, IL location accesses some of the best farmland in the world and is ideal for maximizing production of late-season hybrids up to 120 day maturity.

  • Cuba City, WI
    613 N Randolph St Cuba City, WI 53807
  • Howe, IN
    7075 N 475 E, Howe, IN 46746
  • Mount Pulaski, IL
    247 1500th Ave, Mount Pulaski, IL 62548

Foundation seed

At the Mount Pulaski, IL facility, Gro Alliance offers a complete suite of foundation and nursery services. From inbred increases, to crossing blocks and pilot production isolations, Gro Alliance can help you expand your breeding or testing program with a variety of foundation seed solutions. Our foundation team, led by Jim McCormick, has a wide range of experience in different endosperms from red, white, blue, purple, yellow and popcorn seed work, they have seen it all!

We can offer isolation distances up to 1320 feet from neighboring corn and have significant hand harvest experience.

Since the 2015 crop year, we have offered drip irrigation for crossing blocks, inbred increases, hand pollinations and other nursery related services.

About Gro Alliance

History • Leadership

Gro Alliance’s leadership teams combines individuals with diverse experiences from parent seed to popcorn seed production gained from time at multinationals and family-owned companies. This diverse set of expertise and knowledge merges together to form a broad and cohesive skill set that helps Gro Alliance produce some of the highest quality seed in the industry, for some of the world’s most demanding organizations.



Founded by Gerald and Amelia Schweigert


Expanded drying with a coal-fired dryer


Increased drying and warehouse capacity


Constructed new single-pass reversing, propane-fired dryer and tripled capacity


Renovated and expanded conditioning, packaging and warehouse capacity


Lou and Sherri Schweigert purchase the company


Second conditioning, packaging and warehouse renovation and expansion


Expanded drying capacity


Purchased the Cuba City, WI facility from Mycogen and relocated company headquarters there


Expanded dryer capacity

2003 - Cuba City Dryer Expansion


Expanded dryer capacity and renovated conditioning, packaging and treating capabilities

2007 - Howe Facility Purchase


Purchased double-pass drying facility in Howe, IN

Gro Alliance Jobs


Constructed single-pass reversing dryer in Howe, IN

RIB Packaging


Added refuge-in-bag (RIB) packaging capabilities in Cuba City and expanded packaging capacity

CC Dryer


Expanded drying and warehousing capacity in Cuba City, WI

Mt Pulaski site


Purchased Mount Pulaski, IL facility from Bo-Jac Seed Company



Expanded single-pass reversing drying capacity in Howe, IN and added warehousing

Leadership Team

One of Gro Alliance’s strengths is the diverse set of experiences and perspectives among its leadership team. From backgrounds outside of the seed industry to production experience with both multinational and family-owned companies, Gro Alliance brings together a unique set of philosophies to guide strategic and operational decisions.

Account Managers

Gro Alliance’s account managers link the field production and facility operations teams with its clients. From details on packaging specs, communication of the crop status and anything else required for a smooth relationship, the account managers have it covered!

Meet Our Team

Jim Schweigert


Jim, a third-generation seedsman, is the president of Gro Alliance. Having worked for corporate public relations firms in Minneapolis, Chicago and Atlanta after growing up in the family seed business, Jim’s unique background and experience make him one of the seed industry’s leaders in innovation.

Jim was honored as the 2009 recipient of Seed World magazine’s “Future Giant” and served as the regional vice president to Canada for the executive board of the American Seed Trade Association from 2009-2015.
Jim has a BA in public relations from the University of Minnesota and an MS in seed technology and business from Iowa State.

Lou Schweigert


Since 1977, Lou has guided Gro Alliance’s strategic direction from the relocation to Cuba City in 1994 to the exiting of retail seed sales to focus 100 percent on contract production in 2003.
With a focus on quality and yield, Gro Alliance thrived during a period of intense industry consolidation to become the largest, family-owned contract seed corn production company in the U.S.

Darrell Honn

Director, Operations

Coming from a facility operations background with both Growmark and Golden Seed Company, Darrell has brought a focus on efficiency and throughput to Gro Alliance as he serves as the direct report for Gro Alliance’s three production locations.
Darrell has a BA in Agronomy from the University of Illinois and an MBA from Iowa State University.

Doug Lowery

Site Lead, Mount Pulaski, IL

Doug has nearly 30 years of seed corn production experience in the Mount Pulaski, IL area as he served as the field manager for Bo-Jac Seed Company prior to Gro Alliance’s acquisition in 2013.
Having spent his career working for a family business, Doug understands the value of hard work and dedication to the crop.

Jay Brant

Finance Manager

Jay joined Gro Alliance after 13 years in the telecommunications industry. Having grown up on a dairy farm near Cuba City, Jay’s passion for agriculture drew him to Gro Alliance where he brings financial management strategies and budgeting expertise to help improve the company short and long-term financial management.
Jay has a BA in accounting from the University of Wisconsin at Platteville.

Joe Carpenter

Site Lead, Howe, IN

Joe’s experience started on his family’s farm as a grower for Pioneer in the Constantine, MI area. From there, he served as a field manager for Pioneer at Constantine, MI and its parent seed facility in Hermiston, OR.
Since joining Gro Alliance, Joe has brought a focus on problem-solving to the Howe facility and his diverse experience has been expanded to popcorn seed production, defoliation and unique planting patterns to maximize pollination of poor male inbreds.

Jim McCormick

Foundation Seed Manager, Mount Pulaski, IL

Jim has more than 30 years of foundation seed experience and has worked with multiple corn endosperm types, including popcorn, white, blue and purple. His knowledge and experience helps Gro Alliance develop unique win-win solutions for companies looking for nursery and breeding services.

  • Cuba City, WI
    613 N Randolph St Cuba City, WI 53807
  • Howe, IN
    7075 N 475 E, Howe, IN 46746
  • Mount Pulaski, IL
    247 1500th Ave, Mount Pulaski, IL 62548