Chill Hours Calculator
Sum chill hours or chill portions from hourly temperature records you provide for dormancy planning.
Tool status
Planned tool
This page describes a tool that is not built yet. It is listed so you can see what Orchard Lab is planning. No calculator or decision logic is available on this page.
How to use this result
Estimate chill accumulation from temperature records you enter for your site.
What this tool does
It totals chill using a standard chill-hour approach from your temperature inputs.
What this tool does not do
It does not predict bloom date or recommend varieties. Chill requirement varies by cultivar.
How to use this result
Compare estimated chill to published cultivar requirements as a planning check. Pair with scouting and local experience for dormancy decisions.
Assumptions
- Temperature data represents your orchard or garden site.
Limitations
- Chill models differ by cultivar and region; results are estimates only.
Related tools
Version 0.0.1 · Last updated: 2026-06-15
Disclaimer
This tool compares your inputs to static thresholds. Local site conditions, radiation, wind, and exposure duration can change actual outcomes.