Red River Valley, North Dakota / Spring Wheat
Total GDD:
3700
(Aug 31)
Day 153 / 153 (100%)
Current Season
Total GDD:
3700
(Aug 31)
Method: 32°F
7-Day Daily Avg: 29.0
7-Day Projection: 3903 by Sep 07
Season: Apr 01, 25 - Aug 31, 2025
Key Freeze Dates (32°F)
Last Freeze:
10%: 05-04
50%: 05-15
90%: 05-23
10%: 05-04
50%: 05-15
90%: 05-23
First Freeze:
10%: 09-10
50%: 09-29
90%: 10-06
10%: 09-10
50%: 09-29
90%: 10-06
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.
Thresholds & Notes
Optimal Plant Window
250
°D
May 1, 2025
|
Apr 24, 2024
|
May 9, 2023
Growth Stage
Target seeding date. 1.5" depth, 1.4M seeds/acre.
Emergence
430
°D
May 10, 2025
|
May 7, 2024
|
May 16, 2023
Growth Stage
Stands visible. Scout for crusting and wireworms.
Tillering
650
°D
May 17, 2025
|
May 18, 2024
|
May 24, 2023
Growth Stage
2-3 tillers formed. Top-dress N if needed.
Jointing
900
°D
May 31, 2025
|
May 30, 2024
|
May 31, 2023
Growth Stage
First node detectable. Flag leaf fungicide timing.
Flag Leaf
1250
°D
Jun 13, 2025
|
Jun 12, 2024
|
Jun 8, 2023
Growth Stage
Flag fully emerged. Wheat midge scouting critical.
Heading
1550
°D
Jun 23, 2025
|
Jun 22, 2024
|
Jun 17, 2023
Growth Stage
50% heads emerged. FHB spray window opening.
Anthesis
1700
°D
Jun 29, 2025
|
Jun 27, 2024
|
Jun 21, 2023
Growth Stage
Flowering. FHB fungicide window 3-5 days.
Milk Stage
1950
°D
Jul 5, 2025
|
Jul 5, 2024
|
Jun 28, 2023
Growth Stage
Kernel watery ripe. Yield components set.
Dough Stage
2150
°D
Jul 11, 2025
|
Jul 11, 2024
|
Jul 4, 2023
Growth Stage
Soft dough, 30% moisture. Swath timing for even ripening.
Maturity
2350
°D
Jul 19, 2025
|
Jul 17, 2024
|
Jul 11, 2023
Growth Stage
Physiological maturity. Direct combine at 14% moisture.