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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Thu, Apr. 2. 2026

 

GDD Total: 552 (Base 32) through Thu, Apr. 2, 2026

  

Foraker, IN

        

Forecast »

“Flashback” to 2025

3/27

3/28

3/29

3/30

3/31

4/1

4/2

4/3

4/4

4/5

4/6

4/7

4/8

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 30° 53° 19 9 0 0 0
02-16 27° 57° 39 19 0 0 0
02-17 39° 55° 64 34 5 0 0
02-18 41° 66° 96 56 17 3 0
02-19 36° 53° 118 68 19 3 0
02-20 28° 47° 134 74 19 3 0
02-21 27° 30° 141 74 19 3 0
02-22 24° 28° 145 74 19 3 0
02-23 20° 26° 146 74 19 3 0
02-24 17° 33° 149 74 19 3 0
02-25 24° 34° 156 74 19 3 0
02-26 18° 37° 161 74 19 3 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 28° 56° 181 84 19 3 0
02-28 28° 50° 198 91 19 3 0
03-01 23° 34° 205 91 19 3 0
03-02 21° 42° 214 91 19 3 0
03-03 27° 40° 226 93 19 3 0
03-04 32° 45° 242 100 19 3 0
03-05 40° 54° 267 114 24 3 0
03-06 47° 73° 305 142 42 14 5
03-07 42° 64° 336 163 53 16 5
03-08 34° 59° 360 178 57 16 5
03-09 45° 71° 397 204 73 25 8
03-10 59° 70° 439 236 96 39 18
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 34° 66° 467 255 104 39 18
03-12 29° 43° 481 259 104 39 18
03-13 37° 48° 502 269 105 39 18
03-14 29° 36° 513 270 105 39 18
03-15 37° 70° 544 291 116 43 18
03-16 23° 56° 561 299 116 43 18
03-17 14° 22° 561 299 116 43 18
03-18 20° 38° 568 299 116 43 18
03-19 31° 61° 593 313 121 43 18
03-20 46° 69° 628 339 136 51 20
03-21 39° 63° 657 358 146 52 20
03-22 40° 64° 688 378 156 54 20
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 28° 39° 699 379 156 54 20
03-24 23° 49° 713 383 156 54 20
03-25 39° 67° 744 404 167 57 20
03-26 48° 77° 784 435 187 69 28
03-27 30° 46° 800 441 187 69 28
03-28 27° 45° 814 445 187 69 28
03-29 35° 60° 840 461 193 69 28
03-30 54° 74° 882 493 215 83 37
03-31 46° 71° 919 519 231 91 40
04-01 39° 46° 939 529 232 91 40
04-02 37° 71° 971 552 244 96 40
04-03 56° 70° 1012 583 265 109 48
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 60° 68° 1054 615 287 123 57
04-05 37° 45° 1073 624 287 123 57
04-06 34° 49° 1093 633 287 123 57
04-07 29° 46° 1108 639 287 123 57
04-08 30° 57° 1130 650 288 123 57
04-09 47° 66° 1164 675 303 129 58
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 23° 35° 7 0 0 0 0
02-16 20° 30° 10 0 0 0 0
02-17 3° 18° 10 0 0 0 0
02-18 1° 15° 10 0 0 0 0
02-19 10° 17° 10 0 0 0 0
02-20 7° 24° 10 0 0 0 0
02-21 14° 29° 10 0 0 0 0
02-22 14° 32° 11 0 0 0 0
02-23 22° 39° 20 0 0 0 0
02-24 34° 50° 40 10 0 0 0
02-25 31° 53° 60 20 0 0 0
02-26 27° 42° 72 23 0 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 48° 91 31 0 0 0
02-28 27° 57° 110 41 0 0 0
03-01 18° 38° 117 41 0 0 0
03-02 18° 34° 120 41 0 0 0
03-03 25° 39° 130 41 0 0 0
03-04 36° 48° 151 51 1 0 0
03-05 31° 51° 170 60 1 0 0
03-06 27° 35° 179 60 1 0 0
03-07 27° 38° 189 61 1 0 0
03-08 25° 42° 201 62 1 0 0
03-09 31° 54° 221 73 1 0 0
03-10 35° 65° 249 91 9 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 45° 61° 280 112 20 3 0
03-12 33° 56° 303 124 23 3 0
03-13 30° 65° 328 140 28 3 0
03-14 42° 77° 365 167 45 12 4
03-15 56° 71° 407 199 67 26 13
03-16 32° 54° 429 210 69 26 13
03-17 24° 48° 443 215 69 26 13
03-18 41° 71° 477 239 83 32 14
03-19 48° 69° 514 265 99 41 18
03-20 29° 47° 530 271 99 41 18
03-21 27° 54° 548 280 99 41 18
03-22 31° 49° 566 287 99 41 18
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 29° 45° 581 292 99 41 18
03-24 33° 45° 597 299 99 41 18
03-25 22° 47° 610 302 99 41 18
03-26 25° 50° 626 308 99 41 18
03-27 33° 58° 649 321 103 41 18
03-28 46° 72° 687 348 120 50 22
03-29 56° 66° 726 377 139 61 28
03-30 55° 74° 768 410 162 76 38
03-31 31° 53° 788 420 162 76 38
04-01 25° 46° 802 424 162 76 38
04-02 36° 63° 830 442 170 76 38
04-03 43° 64° 862 463 181 80 38
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 36° 52° 883 475 183 80 38
04-05 42° 47° 906 488 186 80 38
04-06 34° 45° 924 495 186 80 38
04-07 29° 44° 938 500 186 80 38
04-08 25° 40° 949 500 186 80 38
04-09 28° 44° 963 504 186 80 38
04-10 36° 44° 981 512 186 80 38
04-11 30° 51° 999 521 186 80 38
04-12 29° 57° 1020 532 187 80 38
04-13 44° 61° 1051 553 197 82 38
04-14 48° 66° 1087 578 213 90 40
04-15 39° 51° 1110 591 216 90 40
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 32° 50° 1129 600 216 90 40
04-17 33° 64° 1155 617 222 90 40
04-18 57° 81° 1202 654 249 109 54
04-19 47° 69° 1238 680 265 117 57
04-20 44° 61° 1268 700 276 119 57
04-21 51° 61° 1302 724 289 125 58
04-22 39° 68° 1334 745 301 128 58
04-23 51° 75° 1375 776 322 141 66
04-24 48° 82° 1418 809 345 156 76
04-25 44° 74° 1455 837 362 166 80
04-26 41° 56° 1482 853 369 166 80
04-27 35° 66° 1510 872 377 166 80
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 46° 80° 1551 903 399 180 88
04-29 51° 80° 1595 937 422 195 99
04-30 41° 66° 1627 958 434 199 99
05-01 49° 73° 1665 987 453 210 105
05-02 50° 66° 1702 1013 469 218 108
05-03 44° 64° 1734 1035 481 222 108
05-04 43° 50° 1759 1050 486 222 108
05-05 49° 65° 1794 1075 501 229 110
05-06 48° 68° 1830 1101 517 237 113
05-07 47° 74° 1868 1130 535 248 119
05-08 49° 63° 1902 1154 550 254 120
05-09 37° 66° 1932 1173 559 255 120
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 41° 76° 1968 1200 575 263 123
05-11 45° 74° 2006 1227 593 273 128
05-12 48° 80° 2048 1259 615 287 137
05-13 62° 70° 2092 1293 639 303 148
05-14 61° 75° 2137 1329 665 321 161
05-15 62° 86° 2189 1371 697 345 180
05-16 61° 84° 2240 1412 727 367 197
05-17 57° 65° 2279 1441 746 378 203
05-18 50° 64° 2314 1466 762 386 206
05-19 43° 68° 2348 1490 775 392 207
05-20 47° 58° 2379 1510 786 394 207
05-21 48° 60° 2411 1532 798 398 207
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 46° 56° 2440 1552 807 399 207
05-23 40° 59° 2467 1569 815 399 207
05-24 38° 65° 2497 1588 824 401 207
05-25 53° 67° 2535 1616 842 411 211
05-26 43° 70° 2569 1641 856 417 213
05-27 54° 71° 2610 1671 877 430 220
05-28 54° 63° 2646 1698 893 438 224
05-29 52° 67° 2684 1725 911 448 228
05-30 50° 74° 2723 1755 931 459 235
05-31 46° 63° 2756 1777 943 464 235
06-01 38° 68° 2787 1799 954 467 235
06-02 38° 81° 2824 1826 972 476 239
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 60° 86° 2876 1867 1003 500 258
06-04 64° 77° 2924 1906 1031 520 273
06-05 61° 66° 2965 1937 1053 533 281
06-06 63° 72° 3011 1972 1078 551 294
06-07 58° 77° 3056 2008 1103 568 306
06-08 59° 78° 3103 2044 1130 587 320
06-09 56° 75° 3146 2078 1153 602 330
06-10 52° 75° 3187 2109 1174 615 338
06-11 58° 84° 3237 2148 1204 637 355
06-12 66° 86° 3291 2192 1238 663 376
06-13 63° 71° 3336 2227 1263 680 388
06-14 60° 73° 3380 2262 1287 696 399
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 60° 81° 3429 2300 1316 717 415
06-16 62° 83° 3479 2341 1346 739 432
06-17 67° 86° 3534 2385 1381 766 454
06-18 67° 83° 3587 2428 1414 791 474
06-19 64° 79° 3636 2468 1444 812 490
06-20 62° 82° 3687 2508 1474 835 508
06-21 70° 91° 3745 2557 1512 865 533
06-22 76° 91° 3807 2609 1554 899 562
06-23 75° 92° 3869 2660 1596 933 591
06-24 72° 90° 3928 2709 1635 964 617
06-25 70° 89° 3986 2757 1673 994 641
06-26 72° 89° 4044 2805 1711 1024 667
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 71° 89° 4101 2853 1749 1053 691
06-28 66° 85° 4155 2896 1782 1079 712
06-29 65° 89° 4209 2941 1817 1105 733
06-30 73° 83° 4266 2987 1853 1134 757
07-01 67° 81° 4318 3029 1885 1158 776
07-02 60° 85° 4368 3070 1915 1180 793
07-03 64° 87° 4422 3113 1949 1206 813
07-04 66° 86° 4475 3157 1983 1231 834
07-05 69° 89° 4533 3204 2020 1261 859
07-06 73° 89° 4592 3253 2059 1292 885
07-07 66° 82° 4644 3295 2091 1316 903
07-08 58° 85° 4693 3335 2120 1337 920
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 70° 82° 4747 3379 2154 1363 941
07-10 62° 85° 4799 3420 2186 1387 960
07-11 70° 88° 4856 3467 2223 1416 984
07-12 74° 85° 4914 3515 2261 1446 1008
07-13 67° 84° 4967 3559 2294 1471 1029
07-14 59° 85° 5017 3598 2324 1493 1046
07-15 60° 90° 5069 3641 2357 1517 1065
07-16 70° 87° 5126 3688 2393 1546 1089
07-17 64° 75° 5174 3725 2421 1566 1104
07-18 60° 78° 5221 3763 2448 1585 1118
07-19 64° 80° 5271 3803 2478 1607 1135
07-20 67° 77° 5322 3843 2509 1630 1152
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 60° 81° 5370 3882 2537 1650 1168
07-22 62° 82° 5420 3921 2567 1672 1185
07-23 62° 89° 5473 3965 2601 1697 1205
07-24 73° 93° 5535 4016 2642 1731 1233
07-25 70° 82° 5588 4060 2676 1756 1254
07-26 72° 77° 5641 4103 2708 1781 1274
07-27 72° 87° 5699 4150 2746 1811 1299
07-28 73° 87° 5757 4199 2784 1841 1324
07-29 68° 90° 5814 4246 2821 1870 1348
07-30 69° 86° 5869 4291 2857 1897 1370
07-31 60° 76° 5916 4327 2883 1916 1384
08-01 57° 75° 5960 4361 2907 1932 1395
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 54° 77° 6003 4395 2930 1947 1405
08-03 53° 78° 6047 4428 2954 1963 1416
08-04 55° 80° 6092 4464 2980 1980 1428
08-05 59° 83° 6141 4503 3009 2001 1444
08-06 62° 85° 6193 4544 3040 2025 1463
08-07 65° 87° 6247 4588 3074 2051 1484
08-08 67° 88° 6302 4634 3110 2078 1506
08-09 68° 90° 6360 4681 3147 2108 1530
08-10 70° 89° 6417 4729 3184 2137 1555
08-11 72° 86° 6474 4776 3221 2166 1579
08-12 70° 91° 6533 4824 3260 2197 1605
08-13 67° 84° 6586 4868 3293 2222 1625
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 59° 84° 6636 4907 3323 2244 1641
08-15 61° 87° 6688 4949 3355 2268 1661
08-16 70° 91° 6746 4998 3394 2298 1686
08-17 72° 86° 6803 5045 3430 2327 1710
08-18 66° 83° 6856 5088 3463 2352 1730
08-19 70° 79° 6908 5130 3496 2376 1749
08-20 66° 70° 6954 5166 3522 2394 1762
08-21 59° 73° 6998 5200 3546 2410 1773
08-22 56° 78° 7043 5235 3570 2427 1785
08-23 62° 79° 7092 5273 3599 2448 1801
08-24 57° 72° 7134 5306 3621 2462 1810
08-25 53° 68° 7173 5334 3640 2473 1816
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 51° 68° 7210 5362 3657 2482 1820
08-27 44° 74° 7247 5389 3674 2491 1824
08-28 57° 73° 7290 5422 3697 2506 1834
08-29 48° 69° 7327 5448 3714 2515 1838
08-30 49° 72° 7365 5477 3732 2525 1843
08-31 46° 74° 7404 5505 3751 2536 1848
09-01 47° 77° 7443 5535 3771 2547 1855
09-02 52° 78° 7486 5568 3794 2562 1865
09-03 52° 77° 7529 5600 3816 2577 1875
09-04 51° 65° 7564 5626 3832 2584 1877
09-05 50° 67° 7601 5653 3848 2593 1881
09-06 47° 64° 7635 5677 3862 2599 1882
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 47° 66° 7670 5701 3877 2606 1884
09-08 40° 69° 7702 5723 3889 2610 1884
09-09 42° 74° 7738 5749 3905 2618 1886
09-10 52° 78° 7781 5782 3928 2633 1896
09-11 47° 80° 7822 5814 3949 2646 1905
09-12 49° 81° 7865 5847 3972 2661 1915
09-13 56° 71° 7907 5878 3994 2675 1924
09-14 61° 84° 7957 5919 4024 2697 1941
09-15 56° 84° 8005 5957 4052 2717 1956
09-16 54° 82° 8051 5993 4078 2735 1969
09-17 54° 83° 8098 6029 4105 2754 1982
09-18 54° 85° 8145 6067 4132 2773 1997
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 57° 87° 8195 6107 4163 2795 2014
09-20 62° 86° 8247 6149 4194 2819 2033
09-21 63° 81° 8297 6188 4224 2841 2049
09-22 64° 75° 8344 6226 4252 2860 2064
09-23 61° 77° 8391 6263 4279 2879 2078
09-24 62° 72° 8436 6298 4303 2896 2090
09-25 58° 73° 8480 6331 4327 2912 2100
09-26 51° 77° 8522 6363 4349 2926 2109
09-27 55° 83° 8569 6400 4376 2945 2123
09-28 55° 83° 8615 6437 4403 2963 2137
09-29 56° 84° 8663 6475 4431 2983 2152
09-30 53° 82° 8709 6511 4456 3001 2165
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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