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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Thu, Apr. 9. 2026

 

GDD Total: 715 (Base 32) through Thu, Apr. 9, 2026

  

Fort Wayne, IN

        

Forecast »

“Flashback” to 2025

4/3

4/4

4/5

4/6

4/7

4/8

4/9

4/10

4/11

4/12

4/13

4/14

4/15

Done

801

Late

500

Optimum

250

Early

171

Under

0

 

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2025 & 2026

2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 33° 53° 21 11 1 0 0
02-16 27° 57° 41 21 1 0 0
02-17 37° 58° 67 37 7 0 0
02-18 41° 68° 99 59 19 5 0
02-19 38° 48° 120 70 20 5 0
02-20 30° 43° 135 75 20 5 0
02-21 28° 30° 142 75 20 5 0
02-22 23° 29° 146 75 20 5 0
02-23 20° 26° 147 75 20 5 0
02-24 15° 35° 150 75 20 5 0
02-25 25° 39° 160 75 20 5 0
02-26 21° 40° 169 75 20 5 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 32° 58° 192 88 23 5 0
02-28 32° 51° 211 98 23 5 0
03-01 26° 34° 219 98 23 5 0
03-02 21° 43° 230 98 23 5 0
03-03 27° 38° 240 98 23 5 0
03-04 33° 43° 256 104 23 5 0
03-05 37° 54° 280 118 27 5 0
03-06 42° 75° 316 144 43 13 3
03-07 43° 63° 347 165 54 16 3
03-08 36° 60° 373 181 60 16 3
03-09 44° 73° 409 207 77 24 7
03-10 61° 72° 454 242 101 41 18
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 35° 68° 484 262 111 43 18
03-12 29° 45° 499 267 111 43 18
03-13 38° 52° 521 280 114 43 18
03-14 29° 39° 534 282 114 43 18
03-15 36° 73° 567 305 127 48 18
03-16 26° 58° 587 315 127 48 18
03-17 16° 24° 587 315 127 48 18
03-18 20° 39° 594 315 127 48 18
03-19 33° 63° 620 331 133 48 18
03-20 46° 75° 658 359 151 58 24
03-21 40° 59° 685 376 158 58 24
03-22 42° 73° 721 402 174 65 26
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 29° 40° 733 404 174 65 26
03-24 23° 49° 747 408 174 65 26
03-25 38° 67° 777 428 184 68 26
03-26 50° 80° 820 461 207 82 36
03-27 31° 50° 838 469 207 82 36
03-28 27° 43° 852 472 207 82 36
03-29 35° 60° 877 488 213 82 36
03-30 53° 74° 919 519 234 96 44
03-31 59° 72° 962 553 258 111 55
04-01 37° 58° 987 568 263 111 55
04-02 36° 72° 1019 590 275 115 55
04-03 59° 69° 1062 622 297 130 64
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 44° 68° 1096 647 311 136 65
04-05 38° 48° 1117 658 312 136 65
04-06 37° 50° 1138 669 314 136 65
04-07 27° 40° 1150 671 314 136 65
04-08 29° 63° 1174 685 318 136 65
04-09 52° 73° 1214 715 338 149 73
04-10 53° 61° 1249 740 353 156 75
04-11 37° 61° 1276 757 360 156 75
04-12 48° 78° 1317 788 381 169 83
04-13 62° 77° 1365 826 409 188 97
04-14 65° 82° 1416 867 440 212 116
04-15 64° 78° 1465 906 469 233 132
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 54° 74° 1508 938 491 247 141
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 24° 37° 9 0 0 0 0
02-16 21° 33° 13 0 0 0 0
02-17 4° 19° 13 0 0 0 0
02-18 2° 16° 13 0 0 0 0
02-19 11° 19° 13 0 0 0 0
02-20 9° 22° 13 0 0 0 0
02-21 19° 30° 16 0 0 0 0
02-22 15° 31° 17 0 0 0 0
02-23 23° 40° 27 0 0 0 0
02-24 33° 51° 47 10 0 0 0
02-25 33° 55° 69 22 2 0 0
02-26 28° 40° 81 24 2 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 50° 100 33 2 0 0
02-28 29° 57° 122 45 4 0 0
03-01 19° 38° 128 45 4 0 0
03-02 16° 32° 130 45 4 0 0
03-03 23° 38° 138 45 4 0 0
03-04 35° 53° 160 57 6 0 0
03-05 32° 52° 181 67 6 0 0
03-06 26° 36° 190 67 6 0 0
03-07 28° 38° 201 68 6 0 0
03-08 28° 41° 214 71 6 0 0
03-09 32° 55° 235 82 7 0 0
03-10 34° 65° 263 100 15 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 43° 65° 295 122 27 4 0
03-12 31° 56° 317 134 29 4 0
03-13 29° 64° 341 148 34 4 0
03-14 37° 76° 376 173 48 11 2
03-15 56° 70° 417 204 69 24 9
03-16 33° 57° 440 217 72 24 9
03-17 28° 47° 455 222 72 24 9
03-18 39° 69° 487 244 84 28 9
03-19 52° 68° 525 272 102 38 14
03-20 29° 51° 543 280 102 38 14
03-21 26° 54° 561 288 102 38 14
03-22 31° 45° 577 294 102 38 14
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 29° 45° 592 299 102 38 14
03-24 35° 47° 611 308 102 38 14
03-25 25° 49° 626 313 102 38 14
03-26 26° 49° 641 318 102 38 14
03-27 33° 58° 665 332 106 38 14
03-28 45° 77° 704 361 125 49 21
03-29 57° 70° 746 393 147 63 29
03-30 57° 70° 787 424 168 76 37
03-31 32° 57° 809 437 170 76 37
04-01 29° 47° 825 442 170 76 37
04-02 36° 68° 856 463 181 78 37
04-03 46° 64° 889 486 194 83 37
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 41° 52° 913 500 198 83 37
04-05 41° 53° 938 515 203 83 37
04-06 39° 44° 957 525 203 83 37
04-07 30° 48° 974 532 203 83 37
04-08 24° 39° 984 532 203 83 37
04-09 25° 44° 997 534 203 83 37
04-10 36° 44° 1015 542 203 83 37
04-11 32° 50° 1034 551 203 83 37
04-12 30° 56° 1055 563 204 83 37
04-13 42° 61° 1085 582 214 85 37
04-14 48° 69° 1121 609 230 93 41
04-15 40° 51° 1145 622 234 93 41
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 32° 53° 1165 632 234 93 41
04-17 34° 64° 1192 649 241 93 41
04-18 54° 81° 1238 685 267 111 53
04-19 49° 69° 1274 712 283 120 57
04-20 45° 62° 1306 734 295 123 57
04-21 50° 63° 1341 758 309 130 58
04-22 41° 68° 1373 781 322 135 58
04-23 50° 77° 1415 812 344 148 67
04-24 49° 82° 1459 846 367 164 77
04-25 54° 73° 1500 877 389 177 86
04-26 45° 60° 1531 898 400 180 86
04-27 39° 65° 1561 918 410 182 86
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 44° 79° 1600 947 429 193 93
04-29 55° 84° 1648 985 456 213 107
04-30 44° 64° 1679 1007 468 217 107
05-01 48° 74° 1718 1035 487 227 113
05-02 57° 73° 1761 1069 510 243 123
05-03 51° 58° 1794 1091 522 247 123
05-04 43° 52° 1819 1106 528 247 123
05-05 49° 63° 1853 1130 542 253 124
05-06 51° 67° 1890 1157 559 262 128
05-07 48° 73° 1929 1186 578 273 134
05-08 48° 60° 1961 1208 590 277 134
05-09 37° 66° 1990 1227 599 278 134
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 41° 79° 2028 1256 617 288 139
05-11 49° 73° 2067 1284 636 299 145
05-12 47° 76° 2107 1314 655 310 151
05-13 62° 67° 2149 1347 678 325 161
05-14 61° 73° 2194 1382 703 342 173
05-15 62° 83° 2245 1422 734 365 191
05-16 63° 84° 2297 1464 766 388 209
05-17 58° 65° 2336 1494 785 400 216
05-18 52° 65° 2373 1520 802 409 220
05-19 45° 68° 2408 1545 817 415 221
05-20 46° 54° 2436 1563 825 415 221
05-21 49° 60° 2469 1586 837 420 221
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 46° 57° 2498 1605 847 422 221
05-23 41° 61° 2527 1624 856 423 221
05-24 39° 65° 2557 1645 866 425 221
05-25 50° 65° 2593 1670 881 432 224
05-26 43° 70° 2627 1694 896 439 225
05-27 54° 69° 2667 1724 916 451 232
05-28 55° 60° 2703 1750 931 458 235
05-29 50° 66° 2739 1776 948 467 238
05-30 52° 73° 2780 1807 968 479 246
05-31 49° 67° 2816 1833 985 487 249
06-01 41° 70° 2849 1856 998 493 249
06-02 40° 80° 2887 1884 1016 503 254
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 59° 86° 2938 1925 1047 525 272
06-04 69° 80° 2991 1968 1079 550 292
06-05 63° 71° 3036 2003 1104 567 304
06-06 62° 71° 3080 2037 1129 584 315
06-07 60° 76° 3126 2073 1155 602 328
06-08 59° 76° 3171 2108 1180 619 340
06-09 60° 75° 3217 2144 1205 636 353
06-10 53° 74° 3258 2176 1227 650 361
06-11 59° 83° 3307 2215 1256 671 377
06-12 64° 84° 3360 2257 1288 695 397
06-13 61° 70° 3403 2290 1312 711 407
06-14 59° 66° 3444 2321 1333 724 415
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 60° 78° 3491 2358 1360 743 429
06-16 61° 80° 3540 2397 1389 763 445
06-17 67° 85° 3594 2441 1422 789 466
06-18 66° 85° 3647 2484 1456 815 486
06-19 66° 77° 3697 2524 1485 836 503
06-20 63° 82° 3747 2564 1516 859 520
06-21 68° 91° 3805 2612 1553 888 545
06-22 76° 92° 3866 2663 1595 922 573
06-23 75° 93° 3928 2715 1637 956 602
06-24 75° 92° 3989 2767 1678 989 630
06-25 72° 92° 4049 2816 1718 1021 657
06-26 72° 90° 4108 2865 1757 1052 683
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 72° 90° 4167 2914 1796 1083 709
06-28 72° 87° 4224 2961 1833 1112 733
06-29 64° 90° 4279 3007 1868 1139 755
06-30 74° 85° 4337 3054 1906 1169 780
07-01 70° 84° 4392 3099 1940 1195 802
07-02 61° 85° 4443 3140 1971 1218 820
07-03 66° 89° 4498 3186 2007 1246 842
07-04 66° 89° 4554 3231 2043 1274 865
07-05 69° 91° 4612 3279 2081 1304 890
07-06 72° 89° 4671 3328 2119 1334 916
07-07 70° 78° 4722 3370 2151 1358 934
07-08 61° 86° 4774 3411 2182 1381 953
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 70° 83° 4828 3455 2217 1408 974
07-10 66° 86° 4882 3499 2251 1434 995
07-11 69° 89° 4939 3547 2288 1463 1019
07-12 73° 88° 4998 3595 2327 1494 1045
07-13 70° 86° 5054 3641 2363 1522 1068
07-14 66° 86° 5108 3685 2397 1548 1089
07-15 62° 90° 5162 3729 2431 1573 1110
07-16 73° 84° 5219 3776 2467 1602 1134
07-17 69° 82° 5272 3819 2501 1628 1154
07-18 65° 76° 5321 3858 2529 1648 1170
07-19 63° 83° 5371 3898 2560 1671 1187
07-20 69° 77° 5423 3940 2591 1694 1206
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 63° 81° 5472 3980 2621 1716 1222
07-22 60° 82° 5521 4019 2650 1737 1238
07-23 61° 88° 5574 4061 2683 1762 1258
07-24 73° 94° 5636 4113 2724 1795 1287
07-25 73° 84° 5692 4159 2761 1824 1310
07-26 70° 85° 5748 4205 2797 1852 1333
07-27 73° 86° 5805 4253 2834 1881 1357
07-28 73° 87° 5864 4301 2872 1911 1383
07-29 71° 90° 5922 4349 2911 1942 1408
07-30 71° 88° 5979 4397 2948 1971 1432
07-31 60° 72° 6024 4431 2972 1987 1444
08-01 57° 75° 6068 4465 2997 2003 1455
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 55° 76° 6111 4499 3020 2019 1465
08-03 53° 78° 6155 4533 3044 2035 1476
08-04 58° 79° 6202 4569 3071 2054 1490
08-05 61° 83° 6252 4609 3101 2076 1507
08-06 66° 83° 6305 4652 3133 2100 1527
08-07 65° 86° 6358 4695 3167 2126 1547
08-08 66° 88° 6413 4740 3201 2152 1569
08-09 68° 90° 6470 4787 3238 2181 1593
08-10 69° 90° 6527 4834 3276 2210 1617
08-11 70° 88° 6584 4881 3313 2240 1641
08-12 71° 90° 6642 4929 3351 2270 1666
08-13 69° 86° 6697 4974 3386 2297 1688
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 62° 85° 6749 5016 3418 2321 1707
08-15 63° 88° 6802 5060 3451 2346 1727
08-16 69° 89° 6860 5107 3488 2375 1752
08-17 71° 86° 6916 5153 3525 2404 1775
08-18 64° 85° 6969 5196 3557 2428 1795
08-19 68° 84° 7023 5240 3592 2455 1816
08-20 68° 73° 7072 5279 3620 2475 1832
08-21 63° 72° 7117 5315 3646 2493 1844
08-22 59° 80° 7164 5352 3673 2512 1858
08-23 61° 78° 7212 5389 3701 2531 1873
08-24 56° 74° 7255 5422 3723 2546 1883
08-25 54° 71° 7295 5453 3744 2559 1890
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 50° 69° 7333 5480 3762 2569 1895
08-27 45° 74° 7370 5507 3779 2578 1899
08-28 55° 74° 7413 5540 3801 2592 1909
08-29 50° 70° 7451 5568 3820 2603 1914
08-30 48° 73° 7490 5597 3838 2613 1920
08-31 47° 76° 7529 5626 3858 2625 1926
09-01 48° 79° 7571 5658 3880 2638 1935
09-02 53° 80° 7615 5692 3904 2655 1946
09-03 52° 80° 7659 5727 3928 2671 1957
09-04 50° 67° 7696 5754 3945 2680 1961
09-05 49° 71° 7735 5782 3963 2690 1967
09-06 49° 66° 7770 5808 3979 2698 1969
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 44° 68° 7805 5832 3993 2704 1971
09-08 40° 70° 7838 5855 4006 2709 1971
09-09 43° 75° 7875 5882 4024 2718 1975
09-10 51° 80° 7918 5916 4047 2734 1985
09-11 51° 81° 7963 5950 4071 2750 1997
09-12 51° 82° 8007 5984 4096 2767 2008
09-13 54° 72° 8048 6015 4117 2780 2016
09-14 61° 84° 8099 6056 4148 2802 2034
09-15 57° 86° 8148 6095 4177 2824 2050
09-16 55° 84° 8196 6133 4204 2843 2065
09-17 57° 85° 8244 6172 4233 2864 2080
09-18 55° 87° 8294 6211 4262 2885 2097
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 57° 88° 8344 6251 4293 2908 2114
09-20 62° 87° 8396 6293 4325 2932 2133
09-21 65° 81° 8447 6334 4356 2955 2151
09-22 61° 72° 8491 6369 4380 2971 2162
09-23 61° 77° 8539 6406 4407 2990 2177
09-24 63° 77° 8587 6444 4435 3010 2192
09-25 61° 74° 8632 6479 4461 3028 2204
09-26 52° 79° 8675 6513 4484 3043 2214
09-27 53° 85° 8722 6550 4511 3062 2228
09-28 57° 87° 8772 6590 4541 3084 2245
09-29 57° 85° 8821 6628 4570 3105 2261
09-30 52° 83° 8867 6664 4596 3122 2274
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55

 

Latest Updates

February 16th, 2026Welcome to the 2026 GDD Tracking Season

Although Punxsutawney Phil saw his shadow predicting six more weeks of winter, GDDTracker will start 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. As spring turns to summer, 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 2026!


 

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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