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Dekalb GDU Calculator

Dekalb GDU Calculator | Corn Growing Degree Unit Tracker

Track Growing Degree Units for corn development and predict crop growth stages

GDU Calculator

Planting Information

RM

Temperature Data

°F
°F
50°F

Standard base temperature for corn is 50°F

GDU Calculation

Daily GDU

0

Accumulated GDU

0

Days Since Planting

0

Growth Stage Prediction

Current Stage

Enter Data

GDU to Maturity

0

Planting 0% Maturity

GDU Analysis

GDU Accumulation

Growth Stage Timeline

Key Metrics

Avg. Daily GDU 0
Projected Maturity Date
GDU Required for Hybrid 0

Understanding GDU for Corn

What are Growing Degree Units?

Growing Degree Units (GDUs) measure heat accumulation used to predict plant development rates. For corn, GDUs are calculated using the formula: (Max Temp + Min Temp) / 2 – Base Temperature.

Corn Growth Stages

  • VE – Emergence: ~125 GDUs after planting
  • V6 – Six Leaf Stage: ~475 GDUs
  • V12 – Twelve Leaf Stage: ~870 GDUs
  • VT – Tasseling: ~1135 GDUs
  • R1 – Silking: ~1175 GDUs
  • R6 – Physiological Maturity: Varies by hybrid (typically 2400-2800 GDUs)

Using GDU for Management

GDUs help predict critical growth stages for timing management practices like fertilization, irrigation, and pest control. They’re more reliable than calendar days because they account for temperature variations.

Hybrid Maturity & GDU Requirements

  • Early Season (80-90 RM): ~2000-2200 GDUs to maturity
  • Mid Season (95-105 RM): ~2300-2500 GDUs to maturity
  • Full Season (110-120 RM): ~2600-2800 GDUs to maturity

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