Barossa Valley, SA, Australia / Riesling Grape
Total Chill:
77
(Sep 30)
Day 152 / 153 (99%)
Current Season
Total Chill:
77
(Sep 30)
Method: Dynamic/Portions Model
Season: May 01, 25 - Sep 30, 2025
Key Freeze Dates (32°F)
Last Freeze:
10%: 08-02
50%: 08-28
90%: 09-29
10%: 08-02
50%: 08-28
90%: 09-29
First Freeze:
10%: 05-01
50%: 05-30
90%: 07-16
10%: 05-01
50%: 05-30
90%: 07-16
Chill accumulation tracks the cold exposure needed for dormant fruit trees and plants to break dormancy and bloom properly in spring.
Thresholds mark specific chill values when dormancy requirements are typically met, with crossing dates showing when your season reaches each milestone.
Thresholds & Notes
Accumulation Begins
10
Chill Hours
Jun 5, 2025
|
Jun 4, 2024
|
May 22, 2023
|
May 30, 2022
Dormancy established. Scout for eutypa dieback during leaf fall.
Mid-Accumulation
20
Chill Hours
Jun 19, 2025
|
Jun 22, 2024
|
Jun 15, 2023
|
Jun 13, 2022
Deep dormancy. Complete structural pruning before late winter warm spells.
Minimum Requirement Met
30
Chill Hours
Jul 5, 2025
|
Jul 7, 2024
|
Jun 30, 2023
|
Jun 29, 2022
Riesling base satisfied. Cool-climate variety needs higher chill than red varieties.
Full Requirement Met
45
Chill Hours
Jul 26, 2025
|
Jul 28, 2024
|
Jul 22, 2023
|
Jul 19, 2022
Optimal chill achieved. Monitor bud swell as spring approaches.