Growing Degree Days Calculator
Set your place for station context, then enter daily highs and lows. The calculator returns base-temperature GDD and CHU totals.
Set your place for station context, then enter daily temperatures.
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How this estimate works
Growing-degree-day and crop-heat-unit formulas follow Agriculture and Agri-Food Canada and provincial agronomy guidance. Station context comes from your nearest official weather station.
Planning estimate only. Local extension, soil lab, veterinary, apiary, and label guidance should override a calculator.