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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Sat, Mar. 1. 2025

 

GDD Total: 33 (Base 32) through Sat, Mar. 1, 2025

  

Kalamazoo, MI

        

Forecast »

“Flashback” to 2024

2/23

2/24

2/25

2/26

2/27

2/28

3/1

3/2

3/3

3/4

3/5

3/6

3/7

Done

801

Late

500

Optimum

250

Early

171

Under

0

 

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 20° 32° 4 0 0 0 0
02-16 19° 28° 6 0 0 0 0
02-17 8° 18° 6 0 0 0 0
02-18 2° 15° 6 0 0 0 0
02-19 11° 19° 6 0 0 0 0
02-20 12° 26° 6 0 0 0 0
02-21 20° 29° 8 0 0 0 0
02-22 12° 30° 8 0 0 0 0
02-23 24° 36° 16 0 0 0 0
02-24 35° 48° 36 10 0 0 0
02-25 30° 50° 54 18 0 0 0
02-26 26° 40° 65 19 0 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 42° 81 24 0 0 0
02-28 26° 54° 99 33 0 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 19° 33° 103 33 0 0 0
03-02 17° 32° 105 33 0 0 0
03-03 20° 43° 115 33 0 0 0
03-04 34° 50° 135 43 0 0 0
03-05 44° 53° 161 59 6 0 0
03-06 27° 36° 171 59 6 0 0
03-07 27° 41° 183 61 6 0 0
03-08 26° 40° 194 62 6 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 31° 38° 12 2 0 0 0
02-16 23° 31° 18 2 0 0 0
02-17 17° 24° 18 2 0 0 0
02-18 17° 36° 22 2 0 0 0
02-19 15° 44° 30 2 0 0 0
02-20 22° 52° 45 8 0 0 0
02-21 38° 62° 73 26 8 0 0
02-22 37° 57° 98 41 13 0 0
02-23 29° 50° 116 48 13 0 0
02-24 16° 31° 118 48 13 0 0
02-25 26° 55° 136 56 13 0 0
02-26 33° 63° 162 73 19 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 54° 72° 203 103 40 13 8
02-28 18° 60° 220 110 40 13 8
02-29 17° 37° 225 110 40 13 8
03-01 27° 46° 239 114 40 13 8
03-02 39° 52° 263 128 44 13 8
03-03 40° 66° 294 149 55 16 8
03-04 51° 71° 333 178 74 27 14
03-05 43° 63° 364 199 85 30 14
03-06 36° 48° 384 210 85 30 14
03-07 32° 47° 402 217 85 30 14
03-08 37° 52° 425 230 88 30 14
03-09 32° 51° 445 240 88 30 14
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 36° 456 241 88 30 14
03-11 26° 61° 478 253 90 30 14
03-12 46° 69° 513 278 105 38 16
03-13 48° 70° 550 306 123 47 20
03-14 42° 61° 580 325 132 48 20
03-15 34° 52° 601 336 133 48 20
03-16 32° 58° 624 349 136 48 20
03-17 29° 41° 637 352 136 48 20
03-18 22° 32° 643 352 136 48 20
03-19 27° 46° 658 357 136 48 20
03-20 24° 36° 666 357 136 48 20
03-21 17° 36° 671 357 136 48 20
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 28° 35° 680 357 136 48 20
03-23 27° 36° 689 357 136 48 20
03-24 22° 43° 700 358 136 48 20
03-25 33° 66° 727 376 144 48 20
03-26 41° 61° 757 395 153 49 20
03-27 31° 39° 770 398 153 49 20
03-28 27° 46° 784 402 153 49 20
03-29 23° 53° 800 408 153 49 20
03-30 40° 56° 825 424 159 49 20
03-31 38° 51° 848 436 161 49 20
04-01 40° 56° 874 452 167 49 20
04-02 40° 50° 898 466 171 49 20
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 35° 40° 913 471 171 49 20
04-04 35° 43° 930 478 171 49 20
04-05 35° 48° 949 488 171 49 20
04-06 30° 57° 971 499 172 49 20
04-07 34° 58° 995 513 176 49 20
04-08 44° 73° 1031 539 192 58 24
04-09 49° 68° 1068 566 209 67 28
04-10 39° 65° 1098 586 219 68 28
04-11 47° 54° 1126 604 227 68 28
04-12 45° 55° 1154 622 235 68 28
04-13 39° 59° 1181 639 242 68 28
04-14 54° 74° 1223 671 264 82 36
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 50° 68° 1260 698 281 91 40
04-16 47° 71° 1297 725 298 100 45
04-17 56° 68° 1337 755 318 112 52
04-18 48° 58° 1368 776 329 115 52
04-19 44° 52° 1394 792 335 115 52
04-20 36° 44° 1412 800 335 115 52
04-21 35° 46° 1430 809 335 115 52
04-22 36° 64° 1458 826 343 115 52
04-23 50° 56° 1489 848 354 118 52
04-24 35° 48° 1509 857 354 118 52
04-25 29° 56° 1530 868 355 118 52
04-26 36° 62° 1557 885 362 118 52
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 53° 80° 1601 919 386 135 63
04-28 62° 77° 1649 957 414 154 77
04-29 61° 70° 1692 990 437 170 88
04-30 47° 66° 1727 1015 452 176 89
05-01 55° 77° 1770 1048 476 192 100
05-02 49° 76° 1811 1079 496 205 108
05-03 59° 69° 1853 1111 518 219 117
05-04 54° 77° 1896 1145 542 234 127
05-05 51° 64° 1932 1170 557 242 130
05-06 48° 71° 1970 1198 575 251 134
05-07 55° 69° 2009 1228 595 263 141
05-08 49° 75° 2049 1257 615 275 148
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 51° 60° 2083 1281 628 281 149
05-10 47° 64° 2117 1305 642 286 150
05-11 48° 58° 2148 1326 653 289 150
05-12 40° 76° 2183 1351 668 297 152
05-13 63° 80° 2233 1391 698 318 169
05-14 59° 70° 2275 1423 720 332 178
05-15 53° 74° 2316 1454 741 346 186
05-16 50° 75° 2356 1484 761 358 193
05-17 57° 79° 2402 1520 787 376 206
05-18 53° 83° 2448 1556 813 393 219
05-19 62° 84° 2499 1597 844 417 237
05-20 55° 85° 2547 1635 872 437 252
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 59° 86° 2598 1676 903 459 270
05-22 62° 79° 2646 1714 931 480 285
05-23 54° 77° 2690 1748 955 495 296
05-24 53° 80° 2734 1783 980 512 307
05-25 56° 72° 2777 1815 1002 526 317
05-26 52° 77° 2819 1847 1024 540 326
05-27 56° 65° 2857 1875 1042 550 331
05-28 53° 68° 2895 1903 1061 561 336
05-29 55° 68° 2935 1933 1080 573 343
05-30 47° 71° 2972 1960 1097 582 347
05-31 47° 76° 3012 1990 1117 593 354
06-01 54° 75° 3054 2022 1139 607 363
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 59° 72° 3097 2055 1162 623 373
06-03 53° 82° 3143 2091 1188 640 386
06-04 64° 85° 3195 2133 1221 665 405
06-05 62° 78° 3243 2171 1249 685 420
06-06 60° 76° 3289 2207 1274 703 433
06-07 56° 72° 3331 2239 1297 717 442
06-08 51° 77° 3373 2271 1318 731 451
06-09 53° 75° 3415 2303 1340 744 460
06-10 51° 68° 3452 2330 1357 754 464
06-11 44° 73° 3489 2357 1374 762 468
06-12 60° 85° 3539 2398 1405 785 485
06-13 69° 88° 3596 2444 1441 813 509
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 62° 82° 3646 2484 1471 835 526
06-15 59° 81° 3693 2521 1498 855 540
06-16 63° 89° 3747 2565 1532 881 561
06-17 70° 91° 3806 2614 1571 911 587
06-18 76° 88° 3865 2663 1611 943 613
06-19 75° 90° 3926 2714 1651 976 641
06-20 71° 89° 3984 2762 1689 1006 666
06-21 72° 89° 4042 2810 1728 1036 691
06-22 74° 89° 4101 2860 1767 1067 717
06-23 64° 82° 4152 2900 1797 1090 735
06-24 59° 80° 4200 2938 1825 1109 750
06-25 66° 82° 4252 2980 1857 1133 769
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 66° 80° 4303 3021 1888 1157 787
06-27 56° 73° 4346 3054 1911 1171 797
06-28 60° 73° 4390 3088 1936 1188 808
06-29 68° 83° 4444 3132 1969 1214 829
06-30 58° 74° 4488 3166 1993 1230 840
07-01 48° 74° 4527 3195 2012 1241 846
07-02 57° 78° 4572 3230 2037 1258 858
07-03 69° 84° 4627 3275 2072 1284 880
07-04 63° 80° 4676 3314 2101 1306 896
07-05 61° 82° 4726 3354 2131 1327 913
07-06 62° 75° 4773 3391 2158 1346 927
07-07 57° 84° 4821 3429 2186 1367 942
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 68° 85° 4875 3473 2221 1393 963
07-09 67° 81° 4928 3516 2253 1417 983
07-10 65° 75° 4976 3554 2281 1437 998
07-11 61° 81° 5025 3593 2310 1459 1014
07-12 65° 83° 5077 3635 2342 1483 1033
07-13 65° 86° 5130 3678 2375 1508 1053
07-14 68° 82° 5183 3721 2408 1533 1073
07-15 69° 85° 5238 3766 2443 1560 1095
07-16 67° 82° 5291 3809 2476 1584 1115
07-17 63° 79° 5340 3848 2505 1605 1131
07-18 56° 72° 5382 3880 2527 1619 1140
07-19 52° 77° 5424 3912 2549 1634 1149
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 55° 79° 5469 3947 2574 1650 1161
07-21 58° 80° 5516 3984 2601 1669 1175
07-22 63° 79° 5565 4023 2630 1690 1191
07-23 59° 81° 5613 4061 2658 1710 1206
07-24 63° 75° 5660 4098 2685 1730 1220
07-25 57° 77° 5705 4133 2710 1747 1232
07-26 55° 78° 5750 4168 2735 1763 1244
07-27 56° 81° 5796 4204 2761 1782 1257
07-28 60° 84° 5846 4244 2791 1804 1274
07-29 71° 84° 5901 4289 2827 1831 1296
07-30 69° 84° 5956 4334 2861 1857 1318
07-31 66° 85° 6009 4378 2895 1883 1338
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 69° 84° 6064 4422 2929 1910 1360
08-02 69° 82° 6117 4465 2962 1935 1380
08-03 65° 87° 6171 4509 2996 1961 1401
08-04 63° 86° 6224 4552 3029 1985 1421
08-05 71° 81° 6278 4596 3063 2011 1442
08-06 64° 75° 6325 4634 3091 2031 1456
08-07 58° 78° 6371 4669 3116 2049 1469
08-08 56° 80° 6417 4705 3142 2067 1482
08-09 62° 71° 6462 4740 3167 2084 1494
08-10 56° 71° 6504 4772 3189 2097 1503
08-11 55° 74° 6546 4804 3212 2112 1512
08-12 56° 79° 6592 4840 3237 2129 1525
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 55° 81° 6638 4876 3263 2148 1538
08-14 58° 83° 6686 4915 3292 2168 1553
08-15 64° 71° 6732 4950 3318 2186 1566
08-16 66° 84° 6785 4993 3351 2211 1586
08-17 68° 76° 6835 5033 3381 2233 1603
08-18 67° 76° 6885 5073 3410 2254 1620
08-19 59° 73° 6929 5107 3434 2270 1631
08-20 50° 70° 6967 5135 3452 2280 1636
08-21 48° 73° 7005 5163 3470 2291 1641
08-22 50° 76° 7046 5194 3491 2303 1649
08-23 51° 79° 7089 5227 3514 2319 1659
08-24 56° 86° 7138 5266 3543 2340 1675
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 69° 90° 7195 5313 3580 2369 1699
08-26 73° 92° 7255 5363 3621 2401 1726
08-27 75° 94° 7318 5416 3663 2435 1756
08-28 71° 83° 7373 5461 3698 2463 1778
08-29 67° 84° 7427 5505 3732 2488 1799
08-30 69° 85° 7482 5550 3767 2516 1821
08-31 63° 81° 7532 5590 3797 2538 1838
09-01 61° 78° 7580 5628 3825 2557 1853
09-02 48° 72° 7618 5656 3843 2567 1858
09-03 47° 75° 7657 5685 3862 2579 1864
09-04 49° 81° 7700 5718 3885 2594 1874
09-05 57° 85° 7749 5757 3914 2614 1890
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 55° 71° 7790 5788 3935 2627 1898
09-07 45° 63° 7822 5810 3947 2631 1898
09-08 40° 69° 7854 5832 3960 2636 1898
09-09 53° 77° 7897 5865 3982 2651 1907
09-10 53° 81° 7942 5900 4007 2668 1919
09-11 50° 85° 7988 5936 4033 2685 1932
09-12 53° 87° 8036 5974 4061 2705 1947
09-13 59° 85° 8086 6014 4091 2728 1964
09-14 59° 87° 8137 6055 4122 2751 1982
09-15 59° 88° 8188 6097 4154 2774 2001
09-16 55° 87° 8238 6136 4183 2795 2017
09-17 54° 83° 8284 6172 4209 2814 2030
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 54° 85° 8331 6209 4237 2833 2045
09-19 57° 85° 8381 6249 4266 2854 2061
09-20 63° 84° 8432 6290 4297 2877 2079
09-21 57° 86° 8481 6329 4327 2899 2096
09-22 63° 74° 8528 6366 4353 2917 2109
09-23 57° 67° 8568 6396 4373 2929 2116
09-24 61° 69° 8611 6429 4396 2944 2126
09-25 57° 71° 8653 6461 4418 2959 2135
09-26 51° 73° 8693 6491 4438 2971 2143
09-27 59° 73° 8737 6525 4462 2987 2154
09-28 61° 71° 8781 6560 4487 3003 2165
09-29 63° 74° 8828 6596 4513 3022 2178
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 58° 76° 8873 6631 4538 3038 2190

 

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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