For custom ground rigs, ag retailers, aerial and drone applicators covering corn, soybean and cotton acres
Know which loads go out before the trucks roll.
Hour-by-hour spray windows for every field: 3–10 mph wind band, inversion watch, rain-free time, dicamba temperature caps. Each one has the share of up to 146 forecast runs that agree.
The costly call
One load in the wrong air puts drift on a neighbour
One load sprayed into an inversion or a 12 mph wind can put drift on a neighbour's beans, cotton or orchard. Then the complaint, the investigation and the claim land on the applicator.
How it works
From your place to an answer
Pin your fields
Drop a pin on each field you cover.
Pick the load
Herbicide, dicamba, fungicide, aerial, drone, burndown or defoliant.
See the window
See the next window, how sure it is and what is holding it back: wind, inversion, rain or heat.
In the app
See it on a real forecast
Real forecasts for Greenwood, MS, Mississippi Delta, captured October 5, 2026. Yours will be for your own place and limits.
What you get
Built for custom ground rigs, ag retailers, aerial and drone applicators covering corn, soybean and cotton acres
Inversion watch
Inversion odds around sunset and sunrise for the next three nights, with how many forecast runs agree.
Load planner
Sprayable hours per day for the next 7 days, by load type, and how many forecast runs have room for a full load.
Dicamba temperature cap
The 95 °F stop and the 85–95 °F half-acreage call for today and tomorrow, from the forecast high.
Aerial load check
Fixed-wing and helicopter loads add 80 m wind for the plane on top of the 2–10 mph drift band.
Drone loads
Spray-drone loads get their own, tighter wind and gust limits.
Label limits you can edit
Every limit shows its label source, and you can change it to match the label in your cab.
The loads it times
Herbicide load (post-emerge, Enlist-type)
Post-emerge herbicide on a boom; drift onto a neighbour's crop is the cost. Needs 4 rain-free hours afterwards to be rainfast.
3-hour window · daylight only
Dicamba load (Engenia / Stryax / Tavium, over the top)
Restricted-use dicamba on dicamba-tolerant soybean or cotton under the 2026–2027 labels. Sprays from 1 hour after sunrise to 2 hours before sunset (your time-of-day setting). The 95 °F / 85 °F temperature caps are shown in the Dicamba temperature cap card.
3-hour window · daylight only
Fungicide / insecticide load
Ground-rig fungicide or insecticide; needs coverage and a dry few hours afterwards.
3-hour window · daylight only
Aerial load (fixed-wing or helicopter)
Ag aircraft releasing up to 10 ft above the crop; wind aloft and inversions matter more than on a ground rig. The 80 m wind is a proxy for the wind the aircraft turns in, not the release height.
4-hour window · daylight only
Drone load
Part 137 spray drone; rotor wash and a light airframe make wind and gusts tighter than for a ground rig.
3-hour window · daylight only
Burndown / pre-plant
Burndown ahead of planting (paraquat, glyphosate tank mixes) on fields with no crop up. Burndown is slow in cold weather; the soil-moisture limit stands in for rig carrying capacity (one forecast, no odds).
4-hour window · daylight only
Cotton defoliation / harvest aid
Harvest-aid pass on cotton; works poorly in cool weather and must stay on the leaf. Needs 48 hours at 55 °F or warmer afterwards.
4-hour window · daylight only
What else it watches
- Inversion watch
- Load planner
- Dicamba temperature cap
- Wind aloft for the ag plane
- Rain on your fields, last and next 7 days
- Two dry days for a pre-plant run
Every answer counts the forecast runs that keep the whole load inside your limits, at your field.
Founding members
Join the beta — your first six months free
Only 10 founding places: the first 10 custom ground rigs, ag retailers, aerial and drone applicators covering corn, soybean and cotton acres to apply get the Spray Applicators edition free for six months when it launches. No card needed. When they're gone, it's the waitlist.
Only 10 founding places.
- Your first six months of the Spray Applicators edition free when it launches
- Early access to the app as it is today
- A say in which loads the Spray Applicators edition times next
Questions
Asked before you start
How is this different from a weather app?
A weather app gives one forecast. We check every hour against your load's label limits in up to 146 separate forecast runs. Then we tell you the share of runs where the whole load fits.
Can I keep a record of my spray calls?
Yes. Log a window and the decision log keeps the verdict, the share of forecast runs that passed and the conditions the forecast showed, with your note. Export it to CSV whenever you need it.
What data does it use?
Hourly forecasts plus up to 146 forecast runs from three independent forecast systems for your field's grid cell, pooled and judged run by run and refreshed through the day. Inversion odds use only the runs that publish 80 m temperature — 31 or fewer of up to 146. Soil moisture comes from one forecast, with no odds.
Does it know my product's label?
The defaults come from named labels and extension summaries. Products differ, so set each limit from the label in your cab. The dicamba time-of-day and rain-free rules differ between extension summaries, so they are settings you choose.
Does it cover aerial and drone?
Yes. Each has its own load type and limits, and aerial adds 80 m wind.