Chilling and Growing Degree Hour Information for Various Locations Around the State

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October 1, 2020 through February 15, 2021

Location Total Standard
chill hours		 TSC Last Year
(same date)		 Total Modified chill
hours (starts 11/25)		 TMC Last Year
(same date)		 Last Data
(Days)
Auburn University Turf Unit (Auburn) 724 617 724 440 02/15/21 (117)
Black Belt REC (Marion Junction) 945 786 890 527 02/15/21 (132)
Brewton Ag Research Unit (Brewton) 778 678 743 444 02/15/21 (132)
Chilton County REC (Thorsby) 1009 778 951 514 02/15/21 (135)
Durbin Farms (Clanton) 37 734 0 506 11/16/20 (40)
EV Smith Research Center HQ (Shorter) 831 645 764 389 02/15/21 (136)
Gulf Coast Station REC (Fairhope) 577 428 566 294 02/15/21 (131)
Sand Mountain REC (Crossville) 1261 786 1224 454 02/15/21 (89)
Tennessee Valley REC (Belle Mina) 1270 893 1236 544 02/15/21 (89)
Upper Coastal Plain Substation (Winfield) 1360 1084 1176 724 02/15/21 (138)
Winfred Thomas Ag Research Unit (Hazel Green) 692 1158 497 798 12/30/20 (91)
Wiregrass REC (Headland) 622 507 615 377 02/15/21 (116)

NOTES:

Chill totals for previous years do not include data past February 15.
Comparison data is for the same month and day last year.
The (Days) value after the date indicates the number of days used in calculations



GDH Values Descriptions

Range (GDH cumulations)Description
5000-6000Full Bud Swell/First Green
6000-8000Pre-Pink (Calyx green/red)
8000-9200Pink Bud
9200-1040050% Bloom


Auburn University Turf Unit (Auburn)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 01/12/21 8186.4 01/12/21 8186.4
550 01/18/21 7804.8 01/18/21 7804.8
650 02/02/21 3361.2 02/02/21 3361.2
750 Not met 0 Not met 0
850 Not met 0 Not met 0
950 Not met 0 Not met 0
1050 Not met 0 Not met 0


Black Belt REC (Marion Junction)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 01/06/21 6752.4 01/09/21 6516
550 01/11/21 6516 01/14/21 6511.2
650 01/17/21 6297.6 01/29/21 2685.6
750 02/01/21 1934.4 02/06/21 1542
850 02/08/21 1430.4 02/14/21 15.6
950 Not met 0 Not met 0
1050 Not met 0 Not met 0


Brewton Ag Research Unit (Brewton)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 01/10/21 8889.6 01/12/21 8838
550 01/16/21 8455.2 01/19/21 8263.2
650 02/01/21 3318 02/03/21 3147.6
750 02/14/21 135.6 Not met 0
850 Not met 0 Not met 0
950 Not met 0 Not met 0
1050 Not met 0 Not met 0


Chilton County REC (Thorsby)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 01/05/21 5790 01/08/21 5472
550 01/10/21 5472 01/12/21 5467.2
650 01/14/21 5467.2 01/18/21 5290.8
750 01/28/21 2475.6 02/01/21 1819.2
850 02/04/21 1804.8 02/07/21 1533.6
950 02/13/21 26.4 02/15/21 0
1050 Not met 0 Not met 0


Durbin Farms (Clanton)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 Not met 0 Not met 0
550 Not met 0 Not met 0
650 Not met 0 Not met 0
750 Not met 0 Not met 0
850 Not met 0 Not met 0
950 Not met 0 Not met 0
1050 Not met 0 Not met 0


EV Smith Research Center HQ (Shorter)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 01/07/21 8497.2 01/10/21 8419.2
550 01/12/21 8358 01/16/21 8025.6
650 01/18/21 8019.6 02/01/21 3462
750 02/02/21 3393.6 02/08/21 2665.2
850 Not met 0 Not met 0
950 Not met 0 Not met 0
1050 Not met 0 Not met 0


Gulf Coast Station REC (Fairhope)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 01/30/21 4729.2 02/01/21 3924
550 02/14/21 124.8 02/15/21 0
650 Not met 0 Not met 0
750 Not met 0 Not met 0
850 Not met 0 Not met 0
950 Not met 0 Not met 0
1050 Not met 0 Not met 0


Sand Mountain REC (Crossville)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 12/26/20 4304.4 12/28/20 4267.2
550 01/04/21 2666.4 01/07/21 2598
650 01/09/21 2598 01/11/21 2598
750 01/13/21 2598 01/16/21 2547.6
850 01/19/21 2500.8 01/22/21 2272.8
950 01/28/21 892.8 01/31/21 850.8
1050 02/03/21 626.4 02/05/21 626.4


Tennessee Valley REC (Belle Mina)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 12/25/20 5235.6 12/26/20 5235.6
550 01/04/21 3348 01/06/21 3229.2
650 01/09/21 3199.2 01/10/21 3199.2
750 01/13/21 3199.2 01/16/21 3052.8
850 01/20/21 2852.4 01/22/21 2728.8
950 01/28/21 1230 01/31/21 1150.8
1050 02/03/21 878.4 02/05/21 852


Upper Coastal Plain Substation (Winfield)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 12/15/20 6598.8 12/26/20 5791.2
550 12/22/20 6158.4 01/06/21 3736.8
650 12/28/20 5742 01/10/21 3676.8
750 01/07/21 3693.6 01/16/21 3630
850 01/11/21 3676.8 01/23/21 3117.6
950 01/16/21 3630 02/02/21 1123.2
1050 01/27/21 1738.8 02/08/21 1062


Winfred Thomas Ag Research Unit (Hazel Green)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 12/14/20 1162.8 12/25/20 606
550 12/19/20 1150.8 Not met 0
650 12/26/20 606 Not met 0
750 Not met 0 Not met 0
850 Not met 0 Not met 0
950 Not met 0 Not met 0
1050 Not met 0 Not met 0


Wiregrass REC (Headland)
Chill Requirement Date Chilling Met GDH Total Date Modified Chilling Met Chilling Hours Modified
450 01/17/21 9022.8 01/18/21 8961.6
550 02/03/21 3819.6 02/03/21 3819.6
650 Not met 0 Not met 0
750 Not met 0 Not met 0
850 Not met 0 Not met 0
950 Not met 0 Not met 0
1050 Not met 0 Not met 0