Saskatchewan, Canada / Canola (Regina)

Total GDD: 2451 (Aug 24)

Day 116 / 153 (76%)

Current Season

Total GDD: 2451 (Aug 24)

Method: 41°F

7-Day Daily Avg: 24.8

7-Day Projection: 2625 by Aug 31

Season: May 01, 25 - Sep 30, 2025

Key Freeze Dates (28°F)

Last Freeze:
10%: 04-21
50%: 05-11
90%: 05-16

First Freeze:
10%: 09-17
50%: 09-26
90%: 10-09

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 150 °D

May 10, 2025 | May 13, 2024 | May 12, 2023

Growth Stage

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Cotyledons visible. Flea beetle scouting critical - threshold 25% leaf area loss.

2-Leaf (Rosette) 300 °D

May 24, 2025 | May 27, 2024 | May 21, 2023

Growth Stage

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First true leaves. Flea beetle pressure continues. Frost tolerant to 28°F at this stage.

4-Leaf 450 °D

Jun 1, 2025 | Jun 4, 2024 | May 27, 2023

Growth Stage

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Rosette expanding. Herbicide timing window for broadleaf weeds.

6-Leaf (Late Rosette) 600 °D

Jun 9, 2025 | Jun 13, 2024 | Jun 2, 2023

Growth Stage

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Bolting imminent. Final fungicide timing for blackleg if needed.

Bolting 750 °D

Jun 16, 2025 | Jun 22, 2024 | Jun 6, 2023

Growth Stage

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Stem elongation begins. Plant commits to reproductive growth.

Bud Formation 900 °D

Jun 23, 2025 | Jun 28, 2024 | Jun 11, 2023

Growth Stage

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Green buds visible, still enclosed. Sclerotinia scouting begins.

First Flower 1050 °D

Jun 29, 2025 | Jul 6, 2024 | Jun 17, 2023

Growth Stage

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10% bloom. Sclerotinia fungicide window opens (20-50% bloom). Most frost-sensitive stage.

Full Flower 1300 °D

Jul 9, 2025 | Jul 15, 2024 | Jun 27, 2023

Growth Stage

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50%+ bloom. Peak pollinator activity. Heat stress above 86°F reduces pod set.

End of Flower 1600 °D

Jul 21, 2025 | Jul 25, 2024 | Jul 10, 2023

Growth Stage

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Petals dropping. Pod fill begins. Lygus bug threshold 10-20/10 sweeps.

Pod Development 2000 °D

Aug 6, 2025 | Aug 7, 2024 | Jul 26, 2023

Growth Stage

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Seeds visible in pods. Maintain moisture for seed fill. Green seed risk if frost hits now.

Seed Color Change (60%) 2600 °D

Aug 31, 2024 | Aug 18, 2023

Growth Stage

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Swath timing. Seeds firm, roll but don't crush. Target before Sept 17 hard freeze.

Harvest Ready 2900 °D

Sep 13, 2024 | Aug 30, 2023

Growth Stage

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<10% seed moisture for straight-cut. Regina Plains delivers ~3,100 GDD by Sept 17 (10% freeze date)