TerraClear launches quarter-inch weed maps for existing corn and soybean sprayers

Why it matters

TerraClear is converting its rock-mapping infrastructure into a recurring field-data platform, using existing sprayers instead of requiring proprietary vision hardware.

Brent Frei founded TerraClear to automate rock picking on his family's Idaho farm. On August 25, 2026, TerraClear launched a commercial weed-mapping service that uses the same imaging pipeline to tell corn and soybean sprayers where to apply herbicide.

The launch announcement turns a specialized rock-management operation into a broader field-data business. TerraClear says its system photographs every acre at 1.5-millimeter resolution, identifies weeds as small as one-quarter inch and returns a georeferenced spray prescription, on average, the next day. Growers can upload that file to modern sprayers equipped with section or individual-nozzle control.

TerraClear introduced the weed and stand-count products in July and is taking acre commitments for the 2027 crop season. The timing gives growers, applicators and agricultural retailers a planning window before next spring while giving TerraClear a season to build collection capacity around a time-sensitive service.

From rocks to recurring field data

Frei's path into agriculture came after a software career that included co-founding Onyx Software and Smartsheet. TerraClear's origin was considerably less polished: Frei returned to his family's farm near Grangeville, Idaho, and spent days manually lifting rocks out of fields. In December 2017, he assembled engineers and farming specialists to build a machine-vision and robotics system around the job.

Rock mapping created the technical base for the weed product. TerraClear says it has delivered rock maps covering more than 1.5 million acres for over 1,000 farm operations. Those figures are reported by TerraClear, though they describe a commercial imaging operation rather than a prototype assembled for the weed launch.

"We spent years learning how to find a rock the size of a fist in a 160-acre field and put a machine on it within a few inches," CEO Devin Lammers said in the launch release. "The map is the product. It's what turns a sprayer from a broadcast tool into a targeting tool."

Lammers joined as CEO in August 2024 after working at Farmers Business Network. The launch gives TerraClear a way to sell imagery by the acre or combine collection hardware with a software subscription.

That model also gives TerraClear another product to run through an expensive field-imaging operation. Cameras, positioning systems, collection crews and machine-learning infrastructure become easier to support when the same stack can generate rock maps, weed prescriptions and crop stand counts at different points in the season.

The sprayer gets a file, not another set of eyes

TerraClear's weed-management workflow separates detection from application. Imagery is collected before the sprayer enters the field, processed into a prescription and uploaded to equipment the grower already owns. TerraClear's launch release says RTK positioning ties detections to real-world coordinates.

The operational challenge sits between the flight and the spray pass. Weed pressure changes quickly, so a detailed map loses value if collection, processing or application slips. TerraClear says processing begins in the field, maps arrive the next day on average and crews regularly image more than 1,000 acres per day in favorable weather. Each of those throughput claims comes from TerraClear and will matter more than raw image resolution during a compressed spraying window.

The two purchasing paths address different customers. TerraClear's per-acre Mapping-as-a-Service option handles collection and processing for the grower. Larger operators and service providers can buy hardware and subscribe to the platform, giving them control over when imagery is captured. Both routes produce the same sprayer-ready output, according to TerraClear.

Precision spraying already has several answers

TerraClear is entering an established precision-application market. Sentera's SMARTSCRIPT Weeds also uses drone imagery to generate herbicide prescriptions for existing section- or nozzle-controlled sprayers. Sentera advertises the same quarter-inch detection threshold and a prescription within 24 hours of deployment.

John Deere's See & Spray handles the decision on the machine. Boom-mounted cameras distinguish crops from weeds in real time and activate individual nozzles as the sprayer moves through the field. Greeneye Technology similarly uses onboard cameras and processing, with a retrofit system designed for existing commercial sprayers.

TerraClear's bet centers on preplanned maps and equipment independence. A grower can use the precision controls already installed on a compatible sprayer without adding cameras and processors to the boom. The map can also inform chemical selection, field priority and tank planning before application. That approach introduces a separate collection step, making turnaround and local service capacity central to the sale.

The savings claim has to survive the farm budget

TerraClear's weed-management product page advertises up to 80% less chemical, while its savings calculator labels estimates as directional. The economic result will vary with weed density, chemistry costs, application timing, sprayer configuration and TerraClear's per-acre charge. TerraClear's operational specifications show how the service is intended to work; they do not independently establish a typical herbicide reduction.

The underlying business has substantial venture backing. Madrona Venture Group led TerraClear's $25 million Series A in 2021. Existing investors added $15 million in April 2024 to expand sales, distribution and TerraClear's rock-management technology. GeekWire reported in 2024 that TerraClear had raised approximately $53 million to date. The specifically identified financings in the available record total about $46.1 million, including the $6.1 million financing reported in 2019, the $25 million Series A and the $15 million added in 2024.

Frei began with a machine for one of farming's most disliked manual jobs. TerraClear is now testing whether the data gathered around that machine can support a larger and steadier business. The 2027 season will measure that expansion in committed acres, turnaround times and chemical bills, rather than the size of the smallest weed visible on a phone screen.