GDD-Powered Plant Health Care Timing
GDDIntel tracks Growing Degree Days by ZIP code and delivers precise two-stage pest and disease action alerts for your plant list. Know exactly when to scout and treat — not just approximately.
How It Works
- Add ZIP Codes — real weather-based GDD data for every location you manage.
- Select Plants — choose from 80+ species across trees, shrubs, turf, and annuals.
- Get Action Alerts — Scout Now and Treat Now alerts calibrated to live GDD accumulation, not calendar guesses.
Features
- Real GDD from Open-Meteo weather API (base 50°F, cap 86°F, Cornell Simple Average Method)
- Two-stage alert model: Monitor and Treat Now with confidence ratings
- Bloom Intelligence: GDD-based bloom timing for 17+ flowering plants
- 80+ plants across 12 categories with peer-reviewed pest and disease timing windows
- Per-ZIP GDD dashboard with tabbed location management
- Service log for tracking treatments and scouting history
Pricing Plans
- Homeowner — $9/month or $79/year — 1 ZIP code, up to 5 plants
- Plus — $39/month or $349/year — 5 ZIP codes, up to 20 plants, product recommendations
- Pro — $79/month or $699/year — 20 ZIP codes, up to 100 plants, product recommendations
A 14-day account trial starts at registration. Preview local results before linked-account checkout; paid plan limits unlock after subscription verification.
Frequently Asked Questions
- What are Growing Degree Days?
- GDD measure accumulated heat since January 1 using daily temperature data. GDDIntel uses the Cornell Simple Average: max temp (capped at 86°F) plus min temp, divided by 2, minus the 50°F base. Values below zero count as zero. These daily values accumulate from January 1 each season.
- Which plants and pests are covered?
- GDDIntel covers 80+ plants including oaks, maples, roses, crabapples, Japanese beetle, emerald ash borer, azalea lace bug, apple scab, and many more common ornamental and landscape species across 12 plant categories.
- How accurate is the timing data?
- GDDIntel pulls real historical and forecast temperature data from Open-Meteo for your specific ZIP code, calibrated against peer-reviewed GDD timing research from Cornell University and university cooperative extension services.
- Who is GDDIntel for?
- GDDIntel is built for plant health care professionals — arborists, landscapers, horticulturalists — and serious home gardeners who want science-based timing for pest and disease management rather than calendar-based approximations.
- Is there a free trial?
- Yes. Every plan includes a 14-day free trial. Your card is required at signup but you will not be charged until the trial ends. Cancel any time before the trial ends and pay nothing.