Growing Degree Days Calculator
Calculate growing degree days (GDD) to predict crop development stages, plan planting schedules, and optimize harvest timing based on accumulated heat units.
Corn (Maize) Requirements
Base Temperature: 10°C
Upper Threshold: 30°C
Maturity GDD: 1400 GDD
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Track Crop Growth with Growing Degree Days
Growing Degree Days (GDD) measure accumulated heat that drives plant development. Unlike calendar days, GDD accounts for actual temperature conditions, providing a more accurate way to predict crop maturity and plan agricultural activities.
What Are Growing Degree Days?
Growing Degree Days (GDD), also called heat units, measure the amount of heat accumulated above a crop's base temperature. Plants require a certain amount of heat to progress through growth stages. By tracking GDD, farmers can predict when crops will reach key development milestones regardless of weather variations.
GDD Formula
GDD = [(T_max + T_min) / 2] - T_baseWhy Use Growing Degree Days?
Accurate Predictions
Predict crop development stages more accurately than calendar-based methods.
Optimal Timing
Time pesticide applications, irrigation, and harvest for maximum effectiveness.
Compare Seasons
Compare growing conditions across different years and locations.
How to Calculate GDD
Common Applications
Corn Production
Track corn development from planting to harvest using base 50°F.
Pest Management
Predict insect emergence and time treatments effectively.
Harvest Planning
Estimate harvest dates based on accumulated heat units.
Variety Selection
Choose crop varieties suited to your region's GDD accumulation.
Frequently Asked Questions
The base temperature is the minimum temperature below which a crop doesn't develop. For corn, it's typically 50°F (10°C). Temperatures below this don't contribute to GDD accumulation.