Please Note

The GDD models have only been “ground-truthed” in the Great Lakes region. Use of models outside of this region, including the North East, Great Plains and Transition Zones, should be used with caution. We do not recommend the GDD models we use for the mid/southern transition zone and southern states.

Welcome!

It appears to be your first time visiting GDDTracker
Please enter your zip code for a customized experience. Also, be sure and watch our video introduction video.

   
       

Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Mon, Jul. 6. 2020

 
  

Ankeny, IA

       

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2020 & 2019

2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 17° 43° 8 0 0 0 0
02-16 28° 45° 22 4 0 0 0
02-17 29° 39° 34 6 0 0 0
02-18 22° 34° 40 6 0 0 0
02-19 14° 22° 40 6 0 0 0
02-20 22° 40 6 0 0 0
02-21 17° 47° 50 6 0 0 0
02-22 28° 55° 69 16 0 0 0
02-23 30° 61° 93 29 4 0 0
02-24 31° 44° 109 35 4 0 0
02-25 31° 40° 122 38 4 0 0
02-26 24° 34° 129 38 4 0 0
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 23° 37° 137 38 4 0 0
02-28 23° 34° 144 38 4 0 0
02-29 18° 52° 157 42 4 0 0
03-01 36° 58° 182 57 9 0 0
03-02 32° 40° 196 61 9 0 0
03-03 32° 53° 217 72 10 0 0
03-04 31° 56° 238 83 11 0 0
03-05 35° 47° 258 92 11 0 0
03-06 26° 48° 273 98 11 0 0
03-07 33° 65° 300 115 18 0 0
03-08 45° 72° 337 141 35 8 3
03-09 32° 60° 361 155 39 8 3
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 25° 49° 376 160 39 8 3
03-11 39° 58° 402 177 45 8 3
03-12 41° 63° 432 197 55 11 3
03-13 30° 49° 450 204 55 11 3
03-14 30° 39° 462 207 55 11 3
03-15 29° 41° 475 210 55 11 3
03-16 33° 46° 493 217 55 11 3
03-17 27° 49° 509 223 55 11 3
03-18 41° 49° 532 236 58 11 3
03-19 41° 56° 558 253 65 11 3
03-20 25° 40° 568 253 65 11 3
03-21 30° 43° 583 257 65 11 3
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 31° 37° 595 260 65 11 3
03-23 33° 46° 612 267 65 11 3
03-24 39° 51° 635 280 68 11 3
03-25 40° 56° 661 296 74 11 3
03-26 43° 57° 689 314 82 11 3
03-27 43° 50° 714 328 86 11 3
03-28 47° 67° 749 354 102 18 6
03-29 38° 58° 775 370 108 18 6
03-30 31° 64° 801 385 113 18 6
03-31 36° 60° 827 401 119 18 6
04-01 37° 65° 856 420 128 19 6
04-02 47° 63° 889 443 141 24 6
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 29° 52° 907 452 141 24 6
04-04 26° 47° 922 457 141 24 6
04-05 32° 61° 946 471 146 24 6
04-06 45° 64° 979 493 158 29 6
04-07 57° 83° 1027 531 186 49 21
04-08 45° 69° 1062 556 201 56 23
04-09 33° 48° 1080 565 201 56 23
04-10 26° 53° 1097 572 201 56 23
04-11 39° 57° 1123 588 207 56 23
04-12 30° 47° 1140 595 207 56 23
04-13 25° 39° 1150 595 207 56 23
04-14 23° 41° 1160 595 207 56 23
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 22° 40° 1169 595 207 56 23
04-16 29° 41° 1182 598 207 56 23
04-17 31° 47° 1199 605 207 56 23
04-18 34° 66° 1227 623 215 56 23
04-19 43° 61° 1257 643 225 58 23
04-20 39° 66° 1288 664 236 61 23
04-21 34° 63° 1315 680 243 61 23
04-22 50° 78° 1357 712 265 75 32
04-23 49° 74° 1396 742 284 86 38
04-24 52° 58° 1429 765 297 91 38
04-25 44° 67° 1462 788 311 96 39
04-26 46° 69° 1498 814 326 104 41
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-27 51° 80° 1542 847 350 120 52
04-28 55° 73° 1584 880 372 134 61
04-29 47° 63° 1617 903 386 139 62
04-30 44° 73° 1654 929 402 148 65
05-01 47° 80° 1695 961 423 161 74
05-02 57° 73° 1738 994 446 176 84
05-03 50° 77° 1780 1025 468 190 92
05-04 47° 62° 1812 1048 481 194 92
05-05 45° 50° 1838 1063 486 194 92
05-06 42° 60° 1867 1083 495 196 92
05-07 41° 64° 1898 1103 506 198 92
05-08 38° 56° 1923 1119 511 198 92
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-09 32° 67° 1951 1136 519 198 92
05-10 41° 52° 1975 1151 523 198 92
05-11 41° 58° 2003 1168 531 198 92
05-12 40° 61° 2031 1187 539 199 92
05-13 42° 56° 2059 1204 547 199 92
05-14 53° 65° 2095 1231 563 208 96
05-15 53° 74° 2137 1263 585 221 104
05-16 50° 76° 2178 1294 606 234 112
05-17 54° 67° 2217 1322 625 245 118
05-18 52° 59° 2250 1346 638 250 118
05-19 52° 63° 2285 1371 653 258 121
05-20 57° 63° 2323 1398 671 267 125
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-21 56° 61° 2360 1425 688 276 129
05-22 56° 71° 2401 1457 709 289 138
05-23 61° 75° 2447 1492 735 307 150
05-24 61° 80° 2495 1531 763 327 165
05-25 64° 82° 2546 1571 794 350 183
05-26 64° 80° 2596 1611 824 372 200
05-27 65° 78° 2645 1651 853 393 216
05-28 64° 76° 2693 1689 882 414 232
05-29 53° 72° 2734 1720 902 426 240
05-30 52° 73° 2775 1750 923 439 247
05-31 58° 73° 2818 1784 946 454 258
06-01 64° 88° 2872 1828 980 480 278
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-02 69° 93° 2931 1877 1019 512 305
06-03 71° 89° 2989 1925 1057 541 329
06-04 70° 91° 3047 1973 1096 572 355
06-05 67° 89° 3104 2019 1132 600 378
06-06 68° 86° 3159 2064 1167 627 400
06-07 70° 91° 3218 2113 1206 658 426
06-08 73° 92° 3278 2164 1246 690 453
06-09 69° 78° 3329 2205 1277 713 471
06-10 60° 74° 3374 2240 1302 730 483
06-11 56° 84° 3422 2278 1330 750 498
06-12 56° 87° 3472 2317 1360 772 515
06-13 62° 79° 3520 2356 1388 793 531
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-14 58° 81° 3568 2393 1416 812 545
06-15 64° 87° 3621 2437 1449 837 566
06-16 65° 86° 3675 2480 1483 863 586
06-17 60° 86° 3726 2522 1514 886 604
06-18 67° 87° 3781 2567 1549 913 626
06-19 69° 77° 3832 2608 1581 937 645
06-20 68° 81° 3885 2651 1613 961 664
06-21 65° 88° 3939 2695 1648 988 686
06-22 63° 76° 3987 2733 1675 1007 700
06-23 60° 74° 4032 2768 1700 1024 713
06-24 56° 80° 4078 2804 1726 1043 726
06-25 59° 87° 4129 2845 1757 1065 743
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-26 73° 85° 4186 2891 1794 1094 767
06-27 69° 85° 4241 2936 1829 1121 789
06-28 69° 86° 4296 2982 1864 1149 812
06-29 74° 88° 4355 3031 1903 1179 837
06-30 74° 84° 4412 3077 1940 1208 861
07-01 70° 82° 4466 3121 1974 1234 882
07-02 68° 88° 4522 3168 2010 1263 906
07-03 70° 88° 4579 3215 2047 1292 930
07-04 67° 89° 4635 3261 2083 1319 953
07-05 67° 90° 4692 3307 2120 1348 976
07-06 68° 90° 4748 3354 2157 1377 1000
07-07 70° 91° 4807 3403 2195 1407 1026
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-08 72° 94° 4868 3454 2236 1441 1054
07-09 72° 88° 4926 3502 2275 1471 1079
07-10 69° 88° 4983 3549 2311 1499 1102
07-11 66° 87° 5038 3593 2346 1526 1124
07-12 68° 88° 5094 3639 2382 1554 1147
07-13 66° 87° 5148 3684 2416 1580 1169
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 13° 0 0 0 0 0
02-16 21° 0 0 0 0 0
02-17 21° 26° 2 0 0 0 0
02-18 -0° 21° 2 0 0 0 0
02-19 -5° 21° 2 0 0 0 0
02-20 19° 32° 5 0 0 0 0
02-21 28° 5 0 0 0 0
02-22 10° 31° 5 0 0 0 0
02-23 32° 34° 16 1 0 0 0
02-24 30° 16 1 0 0 0
02-25 -1° 10° 16 1 0 0 0
02-26 18° 16 1 0 0 0
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 16° 16 1 0 0 0
02-28 20° 16 1 0 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 10° 30° 16 1 0 0 0
03-02 19° 16 1 0 0 0
03-03 -4° 16 1 0 0 0
03-04 -6° 10° 16 1 0 0 0
03-05 18° 16 1 0 0 0
03-06 31° 16 1 0 0 0
03-07 15° 24° 16 1 0 0 0
03-08 23° 34° 23 1 0 0 0
03-09 33° 35° 35 3 0 0 0
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 24° 34° 42 3 0 0 0
03-11 22° 39° 50 3 0 0 0
03-12 25° 41° 61 4 0 0 0
03-13 38° 52° 84 17 3 0 0
03-14 34° 49° 104 27 3 0 0
03-15 30° 43° 118 31 3 0 0
03-16 28° 49° 135 38 3 0 0
03-17 28° 41° 148 41 3 0 0
03-18 28° 45° 162 45 3 0 0
03-19 28° 50° 179 52 3 0 0
03-20 33° 53° 200 63 4 0 0
03-21 31° 54° 221 74 5 0 0
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 32° 56° 243 86 7 0 0
03-23 31° 54° 263 96 8 0 0
03-24 43° 48° 287 110 11 0 0
03-25 36° 46° 306 119 11 0 0
03-26 28° 55° 326 129 11 0 0
03-27 39° 69° 358 151 23 4 0
03-28 42° 58° 386 169 31 4 0
03-29 37° 49° 407 180 32 4 0
03-30 31° 40° 420 184 32 4 0
03-31 22° 44° 432 185 32 4 0
04-01 33° 59° 455 199 36 4 0
04-02 35° 54° 478 211 38 4 0
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 33° 54° 499 222 40 4 0
04-04 43° 55° 526 239 47 4 0
04-05 45° 65° 559 262 60 9 0
04-06 47° 75° 598 291 78 20 6
04-07 54° 71° 638 321 99 32 14
04-08 43° 79° 677 350 118 43 19
04-09 43° 65° 709 372 130 47 19
04-10 39° 50° 732 385 133 47 19
04-11 39° 59° 759 402 140 47 19
04-12 33° 39° 773 406 140 47 19
04-13 28° 49° 790 413 140 47 19
04-14 31° 51° 809 422 140 47 19
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 33° 73° 840 443 151 51 19
04-16 47° 75° 880 473 170 62 26
04-17 51° 74° 920 503 191 75 33
04-18 44° 55° 947 521 198 75 33
04-19 38° 63° 976 539 207 75 33
04-20 37° 76° 1011 564 222 82 35
04-21 51° 84° 1056 599 247 99 47
04-22 49° 72° 1095 628 266 110 53
04-23 45° 67° 1129 652 280 116 54
04-24 42° 69° 1163 676 294 122 55
04-25 49° 63° 1197 700 308 128 56
04-26 43° 63° 1228 721 319 131 56
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-27 37° 52° 1250 733 321 131 56
04-28 30° 54° 1270 743 321 131 56
04-29 45° 65° 1303 766 334 136 56
04-30 45° 52° 1330 783 341 136 56
05-01 44° 54° 1357 801 348 136 56
05-02 45° 60° 1388 821 359 139 56
05-03 39° 60° 1416 839 367 139 56
05-04 40° 70° 1449 862 380 144 56
05-05 55° 78° 1493 896 404 160 68
05-06 51° 66° 1530 923 421 169 71
05-07 48° 62° 1563 946 434 174 71
05-08 45° 66° 1596 970 447 179 72
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-09 39° 50° 1619 982 450 179 72
05-10 39° 63° 1648 1001 459 180 72
05-11 48° 55° 1677 1020 468 182 72
05-12 44° 54° 1704 1037 475 182 72
05-13 35° 66° 1733 1056 484 183 72
05-14 51° 68° 1770 1083 501 192 76
05-15 47° 79° 1811 1114 522 205 84
05-16 60° 92° 1866 1159 557 231 105
05-17 63° 75° 1912 1195 583 250 119
05-18 62° 78° 1960 1233 611 270 134
05-19 49° 61° 1993 1256 624 275 134
05-20 41° 56° 2020 1273 631 275 134
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-21 47° 53° 2048 1291 639 275 134
05-22 54° 72° 2089 1322 660 288 142
05-23 49° 71° 2127 1350 678 298 147
05-24 54° 79° 2171 1384 702 314 159
05-25 67° 80° 2223 1426 734 338 177
05-26 59° 77° 2269 1462 760 356 191
05-27 61° 78° 2317 1500 788 376 205
05-28 54° 60° 2352 1525 803 383 208
05-29 58° 75° 2396 1559 827 399 219
05-30 56° 74° 2439 1592 850 414 228
05-31 56° 87° 2489 1632 880 436 245
06-01 61° 82° 2538 1671 909 457 262
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-02 52° 78° 2581 1704 932 472 271
06-03 56° 74° 2624 1737 955 487 281
06-04 61° 85° 2675 1778 986 510 299
06-05 67° 88° 2730 1823 1021 537 322
06-06 69° 85° 2785 1868 1056 564 343
06-07 66° 86° 2839 1912 1090 590 364
06-08 63° 85° 2891 1954 1122 614 383
06-09 64° 79° 2940 1993 1151 635 400
06-10 53° 80° 2985 2028 1176 652 411
06-11 55° 80° 3031 2064 1202 670 424
06-12 58° 73° 3074 2097 1225 685 435
06-13 49° 75° 3114 2127 1245 697 442
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-14 61° 75° 3160 2164 1271 716 455
06-15 65° 87° 3214 2207 1305 741 476
06-16 61° 78° 3262 2245 1333 761 490
06-17 62° 79° 3311 2284 1362 782 506
06-18 64° 75° 3358 2321 1389 801 521
06-19 63° 72° 3404 2357 1415 819 533
06-20 59° 78° 3450 2393 1441 837 547
06-21 64° 70° 3495 2428 1466 854 559
06-22 61° 78° 3543 2466 1494 874 573
06-23 66° 73° 3591 2504 1522 894 588
06-24 62° 77° 3638 2541 1549 913 603
06-25 63° 83° 3689 2583 1580 937 621
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-26 64° 85° 3742 2625 1613 961 640
06-27 69° 89° 3798 2672 1649 990 664
06-28 73° 86° 3856 2719 1687 1019 688
06-29 70° 95° 3916 2770 1727 1052 716
06-30 76° 93° 3979 2822 1770 1086 745
07-01 74° 90° 4039 2872 1810 1118 773
07-02 74° 93° 4100 2923 1851 1151 801
07-03 70° 88° 4157 2970 1888 1180 825
07-04 69° 88° 4213 3017 1924 1209 848
07-05 67° 87° 4269 3062 1960 1236 870
07-06 70° 83° 4323 3106 1994 1262 891
07-07 66° 83° 4375 3149 2026 1287 911
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-08 64° 85° 4428 3191 2059 1311 930
07-09 66° 90° 4484 3237 2095 1339 953
07-10 70° 84° 4539 3282 2130 1366 975
07-11 66° 83° 4591 3324 2162 1390 995
07-12 61° 90° 4645 3368 2196 1416 1015
07-13 69° 87° 4701 3414 2232 1444 1038
07-14 71° 92° 4760 3464 2271 1476 1065
07-15 75° 89° 4820 3514 2311 1508 1092
07-16 68° 88° 4876 3559 2347 1535 1115
07-17 68° 83° 4930 3603 2381 1561 1135
07-18 79° 95° 4995 3658 2426 1598 1167
07-19 79° 97° 5061 3714 2472 1636 1200
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-20 71° 89° 5119 3762 2510 1666 1225
07-21 67° 77° 5169 3802 2540 1688 1242
07-22 64° 77° 5217 3840 2568 1708 1257
07-23 57° 80° 5263 3876 2594 1726 1271
07-24 59° 82° 5311 3915 2622 1747 1286
07-25 61° 80° 5360 3953 2651 1767 1301
07-26 70° 88° 5417 4000 2688 1796 1325
07-27 70° 90° 5475 4048 2726 1826 1350
07-28 69° 86° 5530 4093 2761 1853 1372
07-29 67° 83° 5583 4136 2794 1878 1392
07-30 58° 77° 5629 4172 2820 1896 1405
07-31 59° 75° 5674 4207 2845 1913 1417
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-01 58° 81° 5721 4244 2872 1932 1432
08-02 60° 82° 5770 4284 2901 1954 1448
08-03 66° 84° 5823 4327 2934 1979 1468
08-04 62° 86° 5876 4369 2967 2003 1487
08-05 67° 88° 5931 4414 3002 2030 1510
08-06 65° 84° 5984 4457 3035 2055 1529
08-07 62° 87° 6037 4500 3068 2080 1549
08-08 67° 83° 6090 4543 3101 2105 1569
08-09 57° 83° 6138 4581 3129 2125 1584
08-10 66° 86° 6192 4625 3163 2151 1605
08-11 74° 81° 6247 4671 3198 2179 1628
08-12 71° 80° 6301 4714 3232 2204 1648
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-13 69° 86° 6356 4759 3267 2231 1671
08-14 61° 75° 6402 4795 3293 2249 1684
08-15 59° 77° 6448 4831 3319 2267 1696
08-16 63° 81° 6498 4871 3349 2289 1714
08-17 64° 84° 6550 4913 3381 2313 1733
08-18 63° 82° 6600 4954 3411 2336 1750
08-19 64° 82° 6651 4994 3442 2358 1768
08-20 69° 86° 6707 5040 3478 2386 1790
08-21 67° 79° 6758 5081 3509 2409 1808
08-22 58° 78° 6804 5117 3535 2427 1821
08-23 58° 77° 6849 5152 3560 2444 1834
08-24 58° 74° 6893 5186 3584 2460 1845
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-25 61° 70° 6937 5220 3608 2476 1855
08-26 63° 73° 6982 5255 3633 2493 1868
08-27 59° 77° 7028 5291 3659 2511 1881
08-28 54° 78° 7072 5325 3683 2527 1892
08-29 60° 86° 7123 5366 3714 2550 1909
08-30 58° 75° 7168 5401 3739 2567 1921
08-31 57° 67° 7208 5431 3759 2579 1928
09-01 56° 79° 7253 5467 3784 2597 1941
09-02 63° 83° 7305 5508 3816 2620 1959
09-03 67° 82° 7357 5550 3848 2644 1979
09-04 53° 74° 7399 5582 3870 2658 1987
09-05 55° 86° 7447 5620 3898 2678 2003
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-06 62° 80° 7496 5659 3927 2699 2019
09-07 57° 77° 7541 5695 3952 2717 2031
09-08 63° 70° 7586 5729 3977 2733 2042
09-09 65° 83° 7638 5771 4009 2757 2061
09-10 66° 84° 7691 5814 4042 2782 2081
09-11 72° 87° 7749 5862 4080 2812 2106
09-12 68° 85° 7803 5906 4114 2838 2128
09-13 58° 72° 7846 5939 4137 2853 2137
09-14 55° 75° 7889 5972 4160 2868 2147
09-15 70° 86° 7945 6018 4196 2896 2170
09-16 67° 87° 8000 6064 4231 2924 2193
09-17 69° 89° 8058 6111 4269 2953 2217
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-18 71° 87° 8115 6158 4306 2982 2241
09-19 70° 79° 8167 6200 4338 3006 2261
09-20 67° 88° 8223 6246 4374 3034 2284
09-21 71° 76° 8275 6288 4406 3058 2302
09-22 56° 68° 8315 6318 4426 3070 2310
09-23 52° 78° 8358 6351 4449 3085 2320
09-24 60° 84° 8408 6391 4479 3107 2336
09-25 60° 72° 8452 6425 4503 3123 2347
09-26 48° 71° 8490 6453 4521 3133 2352
09-27 61° 72° 8534 6487 4545 3149 2364
09-28 51° 71° 8573 6516 4564 3160 2369
09-29 56° 71° 8615 6548 4586 3174 2378
2019Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-30 66° 87° 8669 6593 4620 3201 2400

 

Latest Updates

May 19th, 2020Weather Data Interruption

We are currently experiencing problems with tracking growing degree days at GDDTracker.net. The weather feed we rely on from NOAA has been discontinued and is being migrated to a new server. We hope to be able to resume counting growing degree days in the next week or so. Thanks for your patience and understanding.
 

February 17th, 2020Welcome to the 2020 GDD Tracking Season

February 15th marked the start of our 3rd decade counting growing degree days here at GDDtracker.net. What started out as a couple models to schedule plant growth regulator applications to suppress annual bluegrass seedheads has expanded to include models for crabgrass germination, early season DMI fungicide applications, and most recently the Smith-Kerns dollar spot prediction model. We've been making some changes behind the scenes with the servers that continually process the immense amount of data collected daily to ensure system stability in the future. Thanks for your support as we look forward to the 2020 growing season.