For golf course superintendents and sports-field managers
Plan sprays, frost delays and PGRs a week ahead.
Smith-Kerns dollar spot, frost odds for your first tee time and spray windows for your course, from up to 146 forecast runs.
The costly call
A wasted spray or a frost delay costs real money
Fungicide is a real line in the maintenance budget, and a frost delay pushes the whole tee sheet back. One forecast line can't tell you whether Thursday's spray window will hold or whether the greens will be white at your first tee time.
4.3%
share of the average 18-hole maintenance budget ($999,585 in 2023) spent on fungicides
How it works
From your place to an answer
Add your course
Search for your course, town or ZIP code.
Set your limits
Set your first tee time, spray limits and last PGR date.
Plan the week
See this week's spray windows, dollar spot risk, frost odds and when the next PGR is due.
In the app
See it on a real forecast
Real forecasts for Pinehurst, NC, Sandhills, transition zone, captured October 5, 2026. Yours will be for your own place and limits.
What you get
Built for golf course superintendents and sports-field managers
Dollar spot risk
The published Smith-Kerns model run on every forecast run that publishes humidity, against your threshold.
Frost delay odds
Chance of frost at your first tee time and when it likely clears.
PGR GDD tracker
360 °F-GDD intervals since your last trinexapac-ethyl application, with a due-date range.
Spray window
Wind 3–8 mph, no inversion, dry long enough after.
Irrigation skip
The chance rain covers tonight's cycle.
Cart call
Rain in the last 72 h and dry hours ahead for cart-path-only decisions.
The tasks it times
Fungicide / PGR spray window
Boom spray on greens, tees or fairways that must stay on target and dry on the leaf.
3-hour window · daylight only
Greens aerification & topdressing
Core or solid-tine aerification with sand topdressing; sand has to stay dry long enough to brush in.
8-hour window · daylight only
No-frost-delay morning
A morning where the first tee time goes off on schedule.
7-hour window
Irrigation skip
Tonight's cycle can be skipped because rain will replace it.
1-hour window
Mowing & rolling
Morning greens mowing and rolling on dry, firm surfaces.
3-hour window
Full cart traffic (no cart-path-only)
A day dry enough after rain to let carts off the paths.
8-hour window · daylight only
What else it watches
- Dollar spot risk (Smith-Kerns)
- Frost delay odds
- PGR reapplication (growing degree days)
- ET replacement: what irrigation has to put back
- Rain last 72 h / next 72 h (cart and closure call)
- Crew heat
Every answer counts the forecast runs that keep the whole task inside your limits, at your course.
Founding members
Join the beta — your first six months free
Only 10 founding places: the first 10 golf course superintendents and sports-field managers to apply get the Golf & Sports Turf 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 Golf & Sports Turf edition free when it launches
- Early access to the app as it is today
- A say in which tasks the Golf & Sports Turf edition times next
Questions
Asked before you start
How is this different from a weather app or my disease-model app?
It runs dollar spot on every forecast run that publishes humidity, and frost and spray limits on every forecast run, and gives you the share that pass, days ahead, not just one model line.
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.
Is the dollar spot model the real Smith-Kerns?
Yes: the published equation and coefficients from the University of Wisconsin Turfgrass Diagnostic Lab, with its 10–35 °C active range.
What data does it use?
It pools up to 146 forecast runs for your course from three independent forecast systems, judged run by run and refreshed through the day, plus season-to-date temperature for GDD.
Does it detect lightning?
No. Use your lightning detection system for play suspension.