Grand Forks, North Dakota / Spring Wheat

Total GDD: 2456 (Jul 15)

Day 76 / 76 (100%)

Current Season

Total GDD: 2456 (Jul 15)

Method: 32°F

7-Day Daily Avg: 38.1

7-Day Projection: 2723 by Jul 22

Season: May 01, 25 - Jul 15, 2025

Key Freeze Dates (32°F)

Last Freeze:
10%: 04-25
50%: 05-11
90%: 05-21

First Freeze:
10%: -- (rarely occurs)
50%: -- (rarely occurs)
90%: -- (rarely occurs)

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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Thresholds & Notes

Emergence 180 °D

May 8, 2025 | May 9, 2024 | May 9, 2023 | May 10, 2022

Growth Stage

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Coleoptile breaks soil surface

2-Leaf Stage 395 °D

May 13, 2025 | May 17, 2024 | May 16, 2023 | May 18, 2022

Growth Stage

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Tillering begins

Jointing (GS30) 650 °D

May 25, 2025 | May 28, 2024 | May 24, 2023 | May 29, 2022

Growth Stage

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First node detectable, stem elongation

Flag Leaf (GS39) 1000 °D

Jun 5, 2025 | Jun 9, 2024 | Jun 2, 2023 | Jun 10, 2022

Growth Stage

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Flag leaf fully emerged

Heading (GS55) 1300 °D

Jun 15, 2025 | Jun 17, 2024 | Jun 8, 2023 | Jun 18, 2022

Growth Stage

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50% of head emerged from boot

Anthesis (GS65) 1450 °D

Jun 19, 2025 | Jun 22, 2024 | Jun 12, 2023 | Jun 22, 2022

Growth Stage

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Flowering, critical for yield

Milk Stage (GS73) 1700 °D

Jun 26, 2025 | Jun 30, 2024 | Jun 19, 2023 | Jun 28, 2022

Growth Stage

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Kernel watery ripe

Dough Stage (GS85) 1900 °D

Jul 1, 2025 | Jul 5, 2024 | Jun 24, 2023 | Jul 4, 2022

Growth Stage

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Kernel soft dough

Maturity (GS91) 2100 °D

Jul 6, 2025 | Jul 11, 2024 | Jun 29, 2023 | Jul 9, 2022

Growth Stage

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Kernel hard, ready for harvest