GDD Böyümə Mərhələsi Kalkulyatoru

Q: "Do I need a weather API?"

"Xeyr. CSV or manual input is enough."

Q: "Can I use semicolon CSV from Excel?"

"Bəli. Delimiters are auto-detected and decimal commas are accepted."

Q: "Should I use budbreak or full bloom?"

"Choose the reference your cultivar model uses. You can rename it freely."

Q: "How is the harvest forecast calculated?"

"The remaining GDD to the harvest threshold is divided by the recent daily GDD average."

Q: "Are the thresholds fixed?"

"Xeyr. The template values are only examples and should be edited for your cultivar and region."

Enter a budbreak or bloom date, add daily temperature data, and get the current growth stage and harvest forecast in one place.

Xeyr weather API is required. You can paste CSV, upload a file, or type rows by hand, then edit the stage profile to match your cultivar.

Works with CSV, file upload, or manual rows

Dəstəks Celsius and Fahrenheit

Mərhələ tables stay fully editable

Shareable state stays in the browser

Calculation assumptions

GDD thresholds vary by cultivar, region, tree age, vigor, crop load, and pruning. Edit the template values instead of using them as-is.
Yığım forecasts are estimates based on recent daily GDD averages. They can drift when temperatures swing sharply.
If your CSV has gaps, fill them before making decisions from the result.

CSV input format

The parser accepts comma, semicolon, or tab-delimited files and also tolerates decimal commas.

`date` is required. Accept `tmean`, or `tmin/tmax`, or `gdd`.
The parser auto-detects `comma`, `semicolon`, or `tab` delimiters.
Decimal values can be written as `12.5` or `12,5`.
A `gdd` column overrides temperature columns for that row.
`YYYY-MM-DD` is the recommended date format.

How to use

Enter the reference event and date. Choose budbreak, full bloom, or a custom label.
Set the temperature unit, GDD method, base temperature, and upper threshold if needed.
Yapışdır CSV, upload a file, or add daily rows by hand.
Edit the stage profile, then icmal the current stage, next stage, and harvest forecast.
Copy the result or share the core settings with a URL.

Sample cases

From budbreak to the current stage

Giriş Reference date 2026-03-15, Celsius, base temperature 10°C, daily mean CSV, stage table: Budbreak 0 / Green tip 80 / Full bloom 160 / Petal fall 240 / Fruit set 320 / Yığım 500

Output Kümülatif GDD 400.0 °C·day, current stage Fruit set, harvest forecast 2026-04-08

From full bloom to a harvest forecast

Giriş Reference date 2026-04-08, Fahrenheit, base temperature 50°F, upper threshold 86°F, semicolon CSV, forecast from the last 7 gün

Output Kümülatif GDD 286.0 °F·day, current stage Petal fall, harvest forecast 2026-07-02

Formullar

Daily GDD = max(0, min(input temperature, upper threshold) - base temperature)
Daily GDD = max(0, ((clipped Tmin + clipped Tmax) / 2) - base temperature)
Kümülatif GDD = sum of daily GDD
Gün to the next stage = next threshold - current cumulative GDD
Yığım forecast date = ən son date + ceil(remaining GDD / recent average GDD)

Lüğət

GDD

Growing dərəcə günləri, or the accumulated effective heat used for growth models.

Base temperature

Heat below this threshold does not count toward GDD.

Upper threshold

A cap that prevents unusually hot gün from contributing too much.

Reference event

The starting point for accumulation, such as budbreak or full bloom.

Growth stage

A milestone tied to a GDD threshold.

Forecast window

The number of recent gün used to estimate future progress.

Tez-tez verilən suallar

Do I need a weather API?

Xeyr. CSV or manual input is enough.

Can I use semicolon CSV from Excel?

Bəli. Delimiters are auto-detected and decimal commas are accepted.

Should I use budbreak or full bloom?

Choose the reference your cultivar model uses. You can rename it freely.

How is the harvest forecast calculated?

The remaining GDD to the harvest threshold is divided by the recent daily GDD average.

Are the thresholds fixed?

Xeyr. The template values are only examples and should be edited for your cultivar and region.

Mərhələ template

Load the generic orchard template first, then edit it for your cultivar and region.
The stage names are editable. Keep the threshold values in ascending order.
Use `role=harvest` for the final row when you want the harvest forecast to stop there.