Zhoukou 周口 / 冬小麦 (Winter Wheat)

Total GDD: 6348 (Jun 15)

Day 258 / 258 (100%)

Total GDD: 6348 (Jun 15)

Method: 32°F

7-Day Daily Avg: 51.7

7-Day Projection: 6710 by Jun 22

Season: Oct 01, 24 - Jun 15, 2025

Last Freeze:
10%: 02-25
50%: 03-06
90%: 03-14

First Freeze:
10%: 11-11
50%: 11-28
90%: 12-06

Growing Degree Days (GDD) track heat accumulation to predict when plants reach growth stages, pests emerge, and diseases become active.

Thresholds mark specific GDD values when events typically occur, with crossing dates showing when your season reaches each milestone.

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Fall Emergence 150 °D

Oct 6, 2024 | Oct 5, 2023 | Oct 4, 2022 | Oct 4, 2021

Growth Stage

Coleoptile emergence. Assess plant density and tillering potential. Scout for early season pests.

Fall Tillering 500 °D

Oct 15, 2024 | Oct 16, 2023 | Oct 18, 2022 | Oct 17, 2021

Growth Stage

Active fall tillering. Assess tiller density. Apply fall nitrogen if needed.

Spring Greenup 2100 °D

Jan 21, 2025 | Feb 9, 2024 | Feb 26, 2023 | Feb 27, 2022

Growth Stage

Dormancy break. Growth resumes. Begin spring growth monitoring.

Jointing 2750 °D

Mar 19, 2025 | Mar 21, 2024 | Mar 27, 2023 | Mar 28, 2022

Growth Stage

First node visible. Rapid stem elongation. Critical nitrogen timing.

Heading 3400 °D

Apr 9, 2025 | Apr 14, 2024 | Apr 17, 2023 | Apr 18, 2022

Growth Stage

Critical pollination window begins. Ensure adequate soil moisture. Monitor for insect pests.

Maturity 4500 °D

May 7, 2025 | May 15, 2024 | May 19, 2023 | May 20, 2022

Growth Stage

Physiological maturity. Hard dough. Monitor harvest moisture and weather.