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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Thu, Jul. 10. 2025

 
  

Greencastle, IN

        

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2024 & 2023

2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 33° 41° 15 5 0 0 0
02-16 18° 35° 19 5 0 0 0
02-17 5° 18° 19 5 0 0 0
02-18 7° 16° 19 5 0 0 0
02-19 12° 19° 19 5 0 0 0
02-20 2° 19° 19 5 0 0 0
02-21 5° 26° 19 5 0 0 0
02-22 12° 33° 20 5 0 0 0
02-23 20° 45° 31 6 0 0 0
02-24 33° 53° 52 17 1 0 0
02-25 35° 60° 77 32 7 0 0
02-26 34° 61° 103 48 12 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 37° 55° 127 62 16 0 0
02-28 32° 66° 154 79 23 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 21° 44° 165 80 23 0 0
03-02 14° 36° 168 80 23 0 0
03-03 26° 52° 185 87 23 0 0
03-04 45° 65° 218 110 36 5 0
03-05 32° 55° 239 121 38 5 0
03-06 30° 41° 253 125 38 5 0
03-07 32° 48° 271 133 38 5 0
03-08 32° 50° 290 142 38 5 0
03-09 32° 59° 313 155 41 5 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 34° 68° 342 174 50 6 0
03-11 46° 72° 380 201 67 15 4
03-12 41° 73° 415 226 82 22 6
03-13 43° 76° 452 254 100 32 10
03-14 52° 79° 495 287 123 47 21
03-15 57° 70° 537 319 145 61 30
03-16 33° 57° 560 332 148 61 30
03-17 27° 52° 578 339 148 61 30
03-18 44° 75° 615 367 165 70 34
03-19 49° 67° 651 393 181 78 37
03-20 33° 47° 669 401 181 78 37
03-21 27° 56° 689 410 181 78 37
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 38° 52° 712 423 184 78 37
03-23 36° 46° 731 433 184 78 37
03-24 36° 53° 754 445 187 78 37
03-25 36° 47° 773 455 187 78 37
03-26 32° 55° 795 466 188 78 37
03-27 41° 55° 821 482 194 78 37
03-28 50° 80° 864 516 217 93 47
03-29 61° 71° 908 550 242 110 58
03-30 57° 73° 951 583 264 124 68
03-31 36° 58° 976 598 269 124 68
04-01 30° 54° 996 608 270 124 68
04-02 47° 80° 1038 640 292 138 77
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 51° 65° 1074 666 308 146 80
04-04 46° 55° 1103 684 316 147 80
04-05 44° 59° 1132 704 326 148 80
04-06 39° 45° 1152 714 326 148 80
04-07 32° 56° 1174 726 327 148 80
04-08 28° 43° 1187 729 327 148 80
04-09 32° 49° 1206 738 327 148 80
04-10 40° 63° 1236 757 337 150 80
04-11 40° 51° 1259 771 340 150 80
04-12 31° 58° 1282 784 343 150 80
04-13 45° 68° 1316 808 358 156 82
04-14 53° 73° 1357 839 379 169 90
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 43° 55° 1385 856 386 169 90
04-16 36° 61° 1411 873 393 169 90
04-17 45° 65° 1444 896 405 174 90
04-18 56° 77° 1489 931 430 191 102
04-19 54° 73° 1530 962 452 204 110
04-20 51° 75° 1572 993 473 218 118
04-21 51° 70° 1610 1022 492 228 124
04-22 41° 71° 1645 1046 506 235 125
04-23 50° 77° 1686 1078 527 248 134
04-24 52° 82° 1731 1113 553 265 146
04-25 55° 71° 1772 1144 574 278 154
04-26 45° 59° 1802 1164 584 280 154
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 43° 67° 1835 1187 596 285 154
04-28 53° 82° 1881 1223 622 303 167
04-29 58° 78° 1927 1259 648 321 180
04-30 49° 70° 1965 1286 666 331 184
05-01 63° 72° 2010 1322 692 348 197
05-02 58° 70° 2052 1354 714 362 206
05-03 54° 63° 2089 1381 730 371 210
05-04 46° 51° 2115 1397 737 371 210
05-05 49° 60° 2148 1420 749 375 210
05-06 46° 70° 2184 1446 765 383 213
05-07 52° 76° 2226 1477 787 397 221
05-08 57° 72° 2268 1510 809 411 231
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 45° 67° 2302 1534 823 417 231
05-10 44° 77° 2341 1562 842 428 237
05-11 47° 80° 2382 1594 864 442 246
05-12 60° 77° 2429 1630 890 460 259
05-13 60° 78° 2476 1668 917 479 274
05-14 62° 80° 2525 1707 947 501 290
05-15 65° 87° 2579 1751 981 527 311
05-16 64° 85° 2631 1793 1013 551 330
05-17 59° 69° 2673 1825 1035 565 339
05-18 51° 73° 2713 1855 1055 577 346
05-19 53° 76° 2756 1887 1077 591 355
05-20 56° 74° 2799 1920 1100 606 365
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 55° 63° 2836 1948 1117 615 370
05-22 50° 56° 2867 1968 1128 618 370
05-23 41° 67° 2899 1991 1140 622 370
05-24 50° 69° 2937 2018 1158 632 374
05-25 53° 64° 2973 2045 1175 641 378
05-26 50° 70° 3011 2073 1193 651 383
05-27 57° 70° 3053 2105 1214 664 391
05-28 59° 70° 3095 2137 1237 679 401
05-29 52° 70° 3134 2166 1256 690 407
05-30 58° 74° 3179 2200 1280 706 418
05-31 60° 72° 3222 2234 1304 722 429
06-01 46° 75° 3261 2263 1322 732 435
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 50° 81° 3304 2296 1346 748 445
06-03 62° 86° 3356 2338 1378 772 464
06-04 70° 85° 3412 2384 1414 800 487
06-05 67° 74° 3461 2422 1442 820 502
06-06 66° 76° 3510 2461 1471 841 518
06-07 62° 75° 3556 2498 1498 860 532
06-08 63° 79° 3605 2537 1526 880 548
06-09 60° 76° 3651 2573 1553 899 561
06-10 55° 75° 3695 2606 1576 914 571
06-11 57° 83° 3742 2644 1604 934 586
06-12 63° 81° 3792 2684 1634 956 603
06-13 68° 79° 3844 2726 1666 980 622
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 69° 77° 3895 2767 1696 1002 639
06-15 66° 78° 3945 2807 1726 1024 656
06-16 67° 80° 3997 2849 1758 1048 675
06-17 70° 83° 4051 2893 1793 1075 697
06-18 70° 86° 4107 2939 1829 1103 720
06-19 68° 82° 4160 2982 1862 1128 740
06-20 65° 83° 4212 3024 1894 1152 759
06-21 71° 91° 4271 3073 1932 1182 785
06-22 75° 91° 4332 3124 1974 1216 813
06-23 74° 92° 4393 3175 2015 1249 841
06-24 75° 90° 4454 3226 2056 1282 869
06-25 74° 90° 4514 3276 2095 1313 896
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 74° 92° 4575 3327 2136 1346 923
06-27 75° 89° 4635 3377 2176 1378 950
06-28 74° 88° 4694 3425 2215 1409 976
06-29 71° 83° 4749 3471 2250 1436 998
06-30 72° 87° 4807 3518 2288 1466 1023
07-01 71° 85° 4863 3564 2324 1494 1046
07-02 65° 85° 4916 3608 2357 1519 1066
07-03 68° 88° 4972 3654 2393 1547 1090
07-04 67° 89° 5028 3700 2430 1576 1113
07-05 68° 90° 5086 3747 2467 1605 1137
07-06 72° 90° 5145 3797 2506 1636 1163
07-07 69° 80° 5198 3839 2539 1661 1183
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 61° 86° 5249 3881 2571 1685 1202
07-09 71° 85° 5305 3927 2607 1713 1225
07-10 68° 87° 5361 3973 2642 1740 1247
07-11 70° 91° 5419 4021 2681 1771 1273
07-12 73° 89° 5478 4070 2720 1802 1299
07-13 70° 86° 5534 4116 2756 1830 1322
07-14 66° 87° 5589 4160 2790 1856 1343
07-15 69° 90° 5646 4208 2827 1885 1367
07-16 71° 90° 5704 4256 2866 1916 1393
07-17 69° 83° 5758 4300 2900 1942 1414
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 33° 49° 19 9 0 0 0
02-16 24° 33° 26 9 0 0 0
02-17 11° 23° 26 9 0 0 0
02-18 14° 36° 29 9 0 0 0
02-19 19° 48° 40 10 0 0 0
02-20 28° 56° 60 20 0 0 0
02-21 36° 65° 89 39 9 1 0
02-22 43° 56° 116 56 16 1 0
02-23 36° 52° 138 68 18 1 0
02-24 28° 44° 152 72 18 1 0
02-25 28° 58° 173 83 19 1 0
02-26 35° 73° 205 105 31 5 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 58° 71° 247 137 53 19 9
02-28 26° 71° 273 153 60 19 9
02-29 23° 42° 284 154 60 19 9
03-01 30° 43° 298 159 60 19 9
03-02 40° 55° 324 174 65 19 9
03-03 40° 71° 357 197 78 25 10
03-04 54° 74° 399 229 101 39 19
03-05 49° 65° 435 255 116 46 21
03-06 43° 50° 459 269 120 46 21
03-07 44° 54° 486 286 127 46 21
03-08 47° 58° 517 307 138 48 21
03-09 38° 54° 541 321 142 48 21
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 46° 557 327 142 48 21
03-11 27° 61° 579 339 144 48 21
03-12 43° 69° 613 363 158 54 22
03-13 45° 75° 651 391 176 64 27
03-14 56° 72° 693 423 198 78 36
03-15 45° 58° 722 442 207 80 36
03-16 37° 61° 749 459 214 80 36
03-17 34° 45° 766 467 214 80 36
03-18 30° 34° 777 467 214 80 36
03-19 26° 56° 796 476 214 80 36
03-20 34° 50° 816 486 214 80 36
03-21 30° 43° 830 490 214 80 36
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 32° 49° 849 499 214 80 36
03-23 32° 46° 866 506 214 80 36
03-24 32° 56° 887 517 216 80 36
03-25 47° 68° 923 543 231 87 39
03-26 42° 61° 952 562 241 89 39
03-27 35° 45° 970 570 241 89 39
03-28 29° 58° 992 582 243 89 39
03-29 40° 70° 1025 605 256 93 39
03-30 54° 76° 1068 638 278 108 48
03-31 45° 68° 1102 662 293 114 50
04-01 51° 71° 1141 691 312 126 56
04-02 41° 68° 1174 714 324 130 56
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 35° 41° 1190 720 324 130 56
04-04 35° 40° 1205 725 324 130 56
04-05 37° 45° 1224 734 324 130 56
04-06 30° 56° 1245 745 326 130 56
04-07 41° 64° 1276 766 336 133 56
04-08 46° 75° 1314 794 354 143 61
04-09 55° 73° 1356 826 376 157 70
04-10 53° 60° 1391 851 391 163 72
04-11 49° 60° 1423 873 403 168 72
04-12 46° 60° 1454 894 414 171 72
04-13 42° 69° 1488 918 428 177 72
04-14 58° 80° 1535 955 455 195 86
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 60° 79° 1582 992 482 215 101
04-16 62° 77° 1630 1030 510 234 115
04-17 66° 71° 1676 1066 536 253 128
04-18 49° 77° 1717 1097 557 266 136
04-19 49° 61° 1750 1120 570 271 136
04-20 40° 51° 1773 1133 574 271 136
04-21 35° 45° 1791 1142 574 271 136
04-22 34° 63° 1818 1158 580 271 136
04-23 49° 64° 1853 1183 595 277 138
04-24 41° 53° 1878 1198 600 277 138
04-25 35° 59° 1903 1214 606 277 138
04-26 45° 68° 1938 1238 620 284 140
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 62° 77° 1985 1276 648 303 154
04-28 67° 79° 2037 1317 679 327 172
04-29 61° 68° 2079 1349 701 341 182
04-30 56° 75° 2122 1382 724 356 192
05-01 59° 79° 2169 1419 751 375 206
05-02 59° 85° 2219 1459 781 397 223
05-03 63° 76° 2266 1496 808 416 237
05-04 58° 81° 2314 1534 836 436 252
05-05 60° 70° 2357 1567 859 451 262
05-06 58° 78° 2403 1603 885 469 275
05-07 63° 78° 2452 1642 914 490 291
05-08 55° 78° 2496 1676 938 506 302
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 56° 68° 2536 1707 959 518 309
05-10 50° 66° 2572 1732 974 526 312
05-11 55° 72° 2614 1764 996 540 321
05-12 48° 80° 2656 1796 1018 554 330
05-13 56° 80° 2702 1832 1044 572 343
05-14 60° 64° 2742 1862 1064 584 350
05-15 62° 71° 2787 1897 1089 601 361
05-16 55° 73° 2829 1929 1111 615 370
05-17 63° 75° 2876 1966 1138 634 385
05-18 58° 81° 2923 2003 1165 653 399
05-19 61° 86° 2974 2045 1197 676 417
05-20 64° 85° 3027 2087 1229 701 437
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 64° 87° 3080 2130 1262 726 457
05-22 65° 80° 3131 2171 1293 749 475
05-23 57° 78° 3177 2207 1319 767 487
05-24 61° 82° 3226 2246 1348 788 504
05-25 60° 79° 3274 2284 1376 808 519
05-26 62° 77° 3321 2321 1403 827 533
05-27 61° 74° 3367 2357 1429 845 546
05-28 56° 75° 3410 2390 1452 860 556
05-29 54° 71° 3451 2421 1473 873 564
05-30 51° 76° 3492 2452 1494 886 572
05-31 55° 77° 3536 2486 1518 902 583
06-01 61° 70° 3579 2520 1542 917 593
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 64° 75° 3627 2557 1569 937 608
06-03 61° 82° 3677 2597 1599 959 625
06-04 65° 83° 3729 2639 1631 983 644
06-05 69° 79° 3781 2681 1663 1007 663
06-06 62° 81° 3831 2721 1693 1029 680
06-07 57° 83° 3879 2759 1721 1049 695
06-08 56° 78° 3924 2794 1746 1066 707
06-09 55° 81° 3970 2830 1772 1084 720
06-10 56° 69° 4011 2861 1793 1097 728
06-11 42° 78° 4049 2889 1811 1107 733
06-12 54° 86° 4097 2927 1839 1127 748
06-13 63° 88° 4151 2971 1873 1153 769
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 67° 88° 4206 3016 1908 1180 791
06-15 60° 85° 4257 3057 1939 1203 809
06-16 64° 92° 4313 3103 1975 1231 832
06-17 74° 93° 4375 3155 2017 1265 861
06-18 72° 83° 4430 3200 2052 1292 883
06-19 72° 91° 4490 3250 2092 1324 910
06-20 69° 92° 4548 3298 2130 1354 935
06-21 68° 92° 4606 3346 2168 1384 960
06-22 71° 92° 4666 3396 2208 1416 987
06-23 73° 85° 4723 3443 2245 1445 1011
06-24 62° 87° 4775 3486 2278 1469 1030
06-25 68° 87° 4831 3531 2313 1497 1053
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 68° 78° 4882 3572 2344 1520 1071
06-27 64° 82° 4933 3613 2375 1543 1089
06-28 67° 87° 4987 3658 2410 1569 1110
06-29 76° 85° 5046 3706 2448 1600 1136
06-30 61° 77° 5093 3743 2475 1619 1150
07-01 52° 75° 5135 3775 2497 1633 1159
07-02 57° 86° 5184 3815 2527 1654 1175
07-03 72° 84° 5241 3861 2563 1683 1199
07-04 68° 80° 5293 3903 2595 1707 1218
07-05 63° 84° 5345 3945 2627 1731 1237
07-06 63° 82° 5395 3985 2657 1753 1254
07-07 63° 86° 5448 4028 2690 1778 1273
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 66° 88° 5503 4073 2725 1805 1296
07-09 69° 76° 5553 4113 2755 1827 1313
07-10 64° 83° 5604 4154 2786 1850 1331
07-11 65° 84° 5657 4197 2819 1875 1350
07-12 65° 86° 5710 4240 2852 1900 1371
07-13 68° 89° 5766 4286 2888 1928 1394
07-14 73° 90° 5826 4336 2928 1960 1420
07-15 70° 91° 5884 4385 2967 1990 1446
07-16 68° 81° 5937 4427 2999 2015 1466
07-17 69° 83° 5992 4472 3034 2042 1487
07-18 59° 75° 6037 4507 3059 2059 1499
07-19 56° 77° 6081 4541 3083 2075 1511
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 59° 80° 6129 4579 3111 2095 1526
07-21 63° 80° 6178 4618 3140 2116 1542
07-22 65° 82° 6230 4660 3172 2140 1561
07-23 62° 83° 6281 4701 3203 2163 1579
07-24 66° 83° 6333 4743 3235 2187 1598
07-25 64° 83° 6384 4785 3267 2210 1616
07-26 60° 82° 6433 4823 3295 2231 1632
07-27 60° 84° 6483 4863 3325 2253 1649
07-28 70° 83° 6538 4908 3360 2280 1671
07-29 69° 83° 6592 4952 3394 2306 1692
07-30 70° 88° 6649 4999 3431 2335 1716
07-31 69° 83° 6703 5043 3465 2361 1737
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 71° 86° 6759 5089 3501 2389 1760
08-02 72° 82° 6814 5134 3536 2416 1782
08-03 68° 87° 6870 5180 3572 2444 1805
08-04 67° 88° 6926 5226 3608 2472 1828
08-05 70° 90° 6984 5274 3646 2502 1853
08-06 72° 91° 7043 5323 3685 2533 1879
08-07 67° 79° 7094 5364 3716 2556 1897
08-08 61° 79° 7142 5402 3744 2576 1912
08-09 64° 77° 7191 5441 3773 2597 1928
08-10 54° 76° 7233 5473 3795 2611 1937
08-11 53° 77° 7276 5506 3818 2626 1947
08-12 54° 78° 7320 5541 3843 2642 1958
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 60° 82° 7370 5580 3872 2664 1975
08-14 59° 85° 7420 5620 3902 2686 1992
08-15 68° 80° 7472 5662 3934 2710 2011
08-16 69° 85° 7527 5707 3969 2737 2033
08-17 69° 83° 7581 5751 4003 2763 2054
08-18 66° 79° 7632 5792 4034 2786 2071
08-19 63° 77° 7680 5830 4062 2806 2087
08-20 56° 72° 7722 5862 4084 2820 2096
08-21 51° 73° 7762 5892 4104 2832 2103
08-22 51° 77° 7804 5924 4126 2846 2112
08-23 53° 83° 7850 5960 4152 2864 2125
08-24 64° 89° 7905 6005 4187 2891 2147
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 64° 91° 7960 6050 4222 2918 2169
08-26 67° 91° 8017 6097 4259 2947 2193
08-27 71° 94° 8078 6148 4300 2980 2221
08-28 68° 87° 8134 6194 4336 3008 2244
08-29 68° 92° 8192 6242 4374 3038 2269
08-30 69° 94° 8251 6292 4414 3069 2295
08-31 68° 81° 8304 6334 4446 3094 2315
09-01 57° 84° 8352 6372 4474 3114 2330
09-02 57° 76° 8397 6407 4499 3131 2341
09-03 53° 76° 8439 6439 4521 3145 2351
09-04 52° 86° 8486 6476 4548 3164 2365
09-05 64° 87° 8540 6520 4582 3190 2385
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 60° 76° 8585 6556 4608 3207 2398
09-07 49° 67° 8621 6582 4624 3215 2401
09-08 42° 68° 8654 6605 4637 3220 2401
09-09 43° 77° 8693 6633 4655 3231 2407
09-10 49° 83° 8737 6667 4679 3247 2417
09-11 53° 86° 8784 6704 4706 3266 2432
09-12 56° 88° 8834 6744 4736 3288 2449
09-13 63° 80° 8884 6784 4766 3310 2466
09-14 67° 88° 8940 6830 4802 3338 2489
09-15 63° 87° 8993 6873 4835 3363 2509
09-16 59° 88° 9044 6915 4867 3386 2527
09-17 57° 86° 9094 6954 4896 3408 2543
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 53° 88° 9142 6992 4924 3428 2559
09-19 58° 89° 9193 7033 4955 3451 2577
09-20 60° 90° 9247 7077 4989 3477 2597
09-21 63° 91° 9302 7122 5024 3504 2619
09-22 64° 75° 9349 7159 5051 3523 2634
09-23 66° 71° 9396 7196 5078 3542 2648
09-24 64° 76° 9444 7234 5106 3562 2663
09-25 59° 74° 9488 7268 5130 3578 2674
09-26 58° 78° 9534 7304 5156 3596 2687
09-27 65° 68° 9579 7339 5181 3613 2699
09-28 65° 72° 9625 7375 5207 3631 2712
09-29 66° 72° 9672 7413 5235 3650 2726
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 65° 76° 9721 7451 5263 3671 2742

 

Latest Updates

February 15th, 2025Welcome to the 2025 GDD Tracking Season

Although winter seems very much entrenched in the Great Lakes region with snow and frigid temperatures in the forecast, GDDTracker starts counting on February 15. Spring is when GDDTracker receives the most attention for alerting turfgrass managers of optimal application timing windows for suppressing annual bluegrass seedheads and crabgrass preemergence applications. Beyond the spring models, there are several models that may be helpful throughout the season including the early season dollar spot DMI timer and the Smith-Kerns dollar spot prediction model. To learn about all the available models, click on the "About" tab at the top of the screen. Thanks for your continued support and use of GDDTracker and best wishes for a successful 2025!
 

March 18th, 2024Timing crabgrass preemergence applications in spring

Don't miss this update from from Kevin Frank regarding timing of crabgrass preemergence herbicides.


 

 

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