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Early Season Fungicide App for Dollar Spot Suppression (GDD 50)
through Wed, Apr. 16. 2025

 

GDD Total: 81 (Base 50) through Wed, Apr. 16, 2025

  

Porter, IN

        

Forecast »

“Flashback” to 2024

4/10

4/11

4/12

4/13

4/14

4/15

4/16

4/17

4/18

4/19

4/20

4/21

4/22

Done

201

Late

177

Target

140

Early

101

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 25° 35° 8 0 0 0 0
02-16 18° 30° 10 0 0 0 0
02-17 1° 16° 10 0 0 0 0
02-18 1° 14° 10 0 0 0 0
02-19 8° 19° 10 0 0 0 0
02-20 4° 24° 10 0 0 0 0
02-21 9° 30° 10 0 0 0 0
02-22 12° 34° 11 0 0 0 0
02-23 22° 42° 21 0 0 0 0
02-24 35° 51° 42 12 1 0 0
02-25 33° 51° 62 22 1 0 0
02-26 32° 47° 80 29 1 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 48° 99 38 1 0 0
02-28 31° 57° 120 49 3 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 18° 37° 126 49 3 0 0
03-02 15° 34° 129 49 3 0 0
03-03 26° 42° 141 51 3 0 0
03-04 40° 48° 163 63 5 0 0
03-05 29° 50° 181 71 5 0 0
03-06 28° 38° 192 72 5 0 0
03-07 31° 39° 205 75 5 0 0
03-08 30° 46° 221 82 5 0 0
03-09 31° 56° 243 93 7 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 37° 65° 272 113 16 1 0
03-11 36° 55° 296 126 19 1 0
03-12 34° 52° 316 137 20 1 0
03-13 31° 63° 342 152 25 1 0
03-14 46° 76° 381 181 44 12 6
03-15 48° 68° 417 207 61 21 9
03-16 30° 43° 432 212 61 21 9
03-17 25° 50° 447 218 61 21 9
03-18 44° 72° 484 244 77 29 13
03-19 36° 65° 512 262 85 29 13
03-20 31° 39° 524 265 85 29 13
03-21 29° 56° 545 275 86 29 13
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 32° 49° 563 284 86 29 13
03-23 32° 46° 580 291 86 29 13
03-24 34° 47° 599 300 86 29 13
03-25 29° 45° 614 304 86 29 13
03-26 27° 49° 630 310 86 29 13
03-27 39° 55° 655 326 91 29 13
03-28 46° 77° 695 355 110 41 19
03-29 57° 66° 734 385 130 52 26
03-30 49° 74° 774 415 150 64 33
03-31 33° 47° 792 422 150 64 33
04-01 29° 46° 808 428 150 64 33
04-02 38° 65° 837 448 159 66 33
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 43° 63° 868 469 171 69 33
04-04 38° 52° 891 482 173 69 33
04-05 40° 46° 912 492 174 69 33
04-06 35° 45° 930 500 174 69 33
04-07 31° 43° 945 506 174 69 33
04-08 26° 39° 956 506 174 69 33
04-09 31° 41° 970 510 174 69 33
04-10 37° 45° 989 519 174 69 33
04-11 33° 46° 1006 527 174 69 33
04-12 29° 56° 1027 537 175 69 33
04-13 50° 61° 1060 561 188 74 33
04-14 52° 62° 1096 586 203 81 35
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 39° 53° 1120 600 207 81 35
04-16 33° 44° 1136 607 207 81 35
04-17 37° 63° 1164 625 215 81 35
04-18 56° 78° 1209 660 240 98 47
04-19 46° 52° 1236 677 248 98 47
04-20 42° 58° 1264 695 256 98 47
04-21 44° 59° 1294 714 265 100 47
04-22 42° 66° 1326 736 277 104 47
04-23 48° 69° 1363 763 294 113 51
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 33° 42° 16 6 0 0 0
02-16 26° 32° 23 6 0 0 0
02-17 13° 26° 23 6 0 0 0
02-18 18° 43° 31 6 0 0 0
02-19 22° 47° 43 8 0 0 0
02-20 28° 54° 62 17 0 0 0
02-21 42° 63° 93 38 11 3 0
02-22 39° 51° 116 51 14 3 0
02-23 30° 44° 131 56 14 3 0
02-24 21° 31° 136 56 14 3 0
02-25 29° 56° 156 67 14 3 0
02-26 36° 67° 186 86 24 5 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 55° 68° 225 116 43 16 6
02-28 23° 61° 245 126 43 16 6
02-29 21° 41° 254 126 43 16 6
03-01 30° 43° 269 130 43 16 6
03-02 37° 56° 294 145 48 16 6
03-03 41° 69° 327 168 61 21 6
03-04 53° 70° 366 197 80 32 13
03-05 38° 63° 395 216 89 33 13
03-06 37° 47° 415 226 89 33 13
03-07 34° 49° 434 236 89 33 13
03-08 40° 50° 458 249 92 33 13
03-09 33° 42° 473 255 92 33 13
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 39° 486 257 92 33 13
03-11 28° 62° 508 270 95 33 13
03-12 42° 67° 541 292 108 38 13
03-13 46° 66° 575 316 121 43 13
03-14 41° 66° 606 337 133 47 13
03-15 36° 43° 623 345 133 47 13
03-16 35° 57° 647 359 137 47 13
03-17 31° 40° 661 362 137 47 13
03-18 28° 33° 669 362 137 47 13
03-19 27° 54° 688 371 137 47 13
03-20 28° 41° 700 374 137 47 13
03-21 23° 38° 709 374 137 47 13
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 32° 44° 725 379 137 47 13
03-23 29° 36° 735 380 137 47 13
03-24 28° 47° 751 386 137 47 13
03-25 40° 67° 782 407 148 50 13
03-26 37° 56° 807 422 153 50 13
03-27 30° 42° 821 426 153 50 13
03-28 27° 49° 837 432 153 50 13
03-29 32° 53° 857 442 153 50 13
03-30 40° 60° 885 460 161 50 13
03-31 37° 49° 906 471 162 50 13
04-01 43° 50° 931 485 166 50 13
04-02 36° 59° 956 501 172 50 13
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 34° 37° 970 505 172 50 13
04-04 36° 40° 986 511 172 50 13
04-05 36° 44° 1005 519 172 50 13
04-06 32° 49° 1023 527 172 50 13
04-07 36° 54° 1046 541 175 50 13
04-08 46° 73° 1084 568 193 60 18
04-09 52° 65° 1120 595 209 68 21
04-10 43° 63° 1151 616 220 71 21
04-11 47° 54° 1179 634 228 71 21
04-12 45° 57° 1208 653 237 73 21
04-13 39° 68° 1240 674 249 76 21
04-14 58° 75° 1284 709 273 92 33
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 47° 68° 1320 734 289 100 35
04-16 51° 75° 1360 765 310 113 43
04-17 61° 66° 1402 797 331 126 52
04-18 47° 60° 1434 818 343 130 52
04-19 43° 55° 1460 835 349 130 52
04-20 36° 46° 1479 844 349 130 52
04-21 36° 45° 1498 852 349 130 52
04-22 38° 64° 1527 872 359 131 52
04-23 51° 56° 1558 893 370 134 52
04-24 36° 51° 1580 905 372 134 52
04-25 30° 54° 1600 915 372 134 52
04-26 39° 60° 1628 933 380 134 52
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 58° 75° 1673 967 404 151 64
04-28 61° 75° 1719 1003 430 169 76
04-29 60° 68° 1761 1036 453 183 86
04-30 48° 72° 1799 1064 471 193 91
05-01 58° 75° 1843 1098 495 210 102
05-02 51° 82° 1888 1132 519 226 114
05-03 51° 64° 1923 1158 535 234 116
05-04 48° 80° 1965 1190 557 248 125
05-05 48° 64° 1999 1214 571 254 126
05-06 46° 72° 2036 1240 587 262 130
05-07 56° 76° 2080 1274 611 278 141
05-08 53° 75° 2122 1307 634 292 150
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 51° 67° 2159 1333 650 301 154
05-10 47° 65° 2193 1357 664 307 155
05-11 48° 61° 2226 1380 677 312 155
05-12 46° 80° 2267 1412 699 325 163
05-13 61° 80° 2315 1450 727 346 178
05-14 53° 61° 2350 1475 742 353 180
05-15 53° 62° 2385 1500 757 360 182
05-16 50° 73° 2425 1529 776 371 189
05-17 59° 77° 2471 1565 802 389 202
05-18 59° 82° 2519 1604 831 410 217
05-19 61° 71° 2563 1638 855 426 228
05-20 59° 88° 2615 1679 886 449 247
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 61° 87° 2666 1721 918 473 265
05-22 64° 79° 2716 1761 948 494 282
05-23 56° 76° 2760 1795 972 510 293
05-24 62° 79° 2808 1833 1000 531 309
05-25 57° 67° 2848 1863 1020 543 315
05-26 53° 73° 2889 1894 1041 556 323
05-27 58° 69° 2931 1925 1062 569 332
05-28 54° 71° 2971 1956 1083 582 339
05-29 52° 63° 3007 1981 1098 589 342
05-30 47° 65° 3041 2006 1113 595 343
05-31 49° 77° 3082 2037 1134 609 351
06-01 59° 68° 3124 2069 1156 623 360
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 56° 68° 3164 2099 1176 635 367
06-03 54° 85° 3212 2137 1204 655 382
06-04 68° 86° 3267 2181 1238 681 404
06-05 66° 78° 3317 2222 1269 704 421
06-06 65° 77° 3366 2261 1298 725 437
06-07 59° 76° 3411 2296 1323 742 450
06-08 56° 79° 3457 2331 1348 759 462
06-09 53° 78° 3501 2365 1372 775 473
06-10 54° 62° 3537 2391 1388 783 476
06-11 45° 75° 3575 2420 1407 794 481
06-12 63° 89° 3629 2464 1441 820 502
06-13 72° 90° 3688 2513 1480 851 528
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 64° 82° 3740 2554 1511 874 547
06-15 61° 84° 3790 2594 1541 896 564
06-16 64° 92° 3846 2640 1577 924 587
06-17 77° 92° 3908 2693 1620 959 616
06-18 76° 88° 3968 2742 1659 990 643
06-19 76° 93° 4030 2795 1702 1025 672
06-20 67° 84° 4084 2839 1736 1051 693
06-21 67° 92° 4141 2886 1773 1080 718
06-22 75° 91° 4202 2937 1814 1113 745
06-23 66° 84° 4256 2980 1847 1138 766
06-24 62° 81° 4305 3020 1877 1160 783
06-25 70° 84° 4360 3065 1912 1187 804
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 69° 83° 4414 3109 1946 1213 825
06-27 62° 70° 4458 3143 1970 1229 836
06-28 62° 76° 4505 3180 1997 1247 850
06-29 72° 88° 4563 3228 2035 1278 875
06-30 61° 77° 4610 3265 2062 1297 889
07-01 50° 75° 4651 3295 2082 1309 897
07-02 61° 83° 4701 3336 2113 1332 914
07-03 74° 86° 4759 3384 2151 1362 939
07-04 68° 79° 4811 3425 2182 1385 958
07-05 64° 83° 4862 3467 2214 1409 976
07-06 63° 78° 4911 3505 2242 1429 992
07-07 62° 88° 4963 3548 2275 1454 1012
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 69° 85° 5018 3593 2310 1481 1033
07-09 69° 76° 5069 3634 2341 1503 1051
07-10 66° 78° 5119 3674 2371 1526 1068
07-11 63° 77° 5167 3711 2398 1545 1083
07-12 64° 81° 5217 3752 2429 1568 1101
07-13 65° 88° 5272 3797 2464 1594 1122
07-14 68° 83° 5325 3840 2497 1620 1142
07-15 68° 87° 5381 3885 2532 1647 1165
07-16 67° 82° 5433 3928 2565 1672 1184
07-17 65° 78° 5483 3967 2594 1693 1201
07-18 61° 70° 5526 4001 2618 1709 1211
07-19 54° 76° 5569 4034 2641 1724 1221
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 58° 78° 5615 4070 2667 1742 1234
07-21 60° 80° 5663 4108 2695 1762 1249
07-22 62° 79° 5712 4147 2724 1783 1265
07-23 63° 83° 5763 4188 2755 1806 1283
07-24 65° 75° 5812 4226 2783 1826 1299
07-25 60° 76° 5858 4262 2809 1844 1312
07-26 53° 79° 5902 4297 2834 1860 1323
07-27 59° 82° 5950 4335 2862 1881 1339
07-28 65° 81° 6001 4376 2893 1904 1356
07-29 71° 83° 6056 4421 2928 1931 1379
07-30 67° 87° 6112 4466 2963 1958 1401
07-31 70° 88° 6169 4513 3000 1987 1425
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 71° 84° 6224 4559 3036 2015 1447
08-02 69° 80° 6277 4602 3069 2040 1467
08-03 68° 87° 6332 4647 3104 2067 1489
08-04 67° 88° 6388 4693 3140 2095 1512
08-05 70° 87° 6445 4739 3176 2123 1536
08-06 69° 81° 6497 4782 3209 2148 1556
08-07 63° 78° 6546 4821 3238 2169 1571
08-08 59° 81° 6594 4859 3266 2189 1586
08-09 64° 73° 6641 4895 3292 2207 1600
08-10 55° 75° 6683 4928 3315 2222 1610
08-11 55° 76° 6727 4962 3339 2238 1620
08-12 55° 77° 6771 4995 3362 2253 1631
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 55° 81° 6817 5032 3389 2272 1644
08-14 58° 83° 6866 5070 3417 2292 1660
08-15 67° 76° 6915 5109 3446 2313 1676
08-16 68° 85° 6969 5154 3481 2340 1697
08-17 67° 77° 7019 5194 3511 2362 1714
08-18 67° 73° 7067 5232 3539 2381 1729
08-19 65° 72° 7113 5268 3565 2400 1742
08-20 53° 69° 7152 5297 3584 2411 1749
08-21 50° 73° 7192 5327 3604 2422 1755
08-22 50° 77° 7234 5358 3625 2436 1764
08-23 53° 80° 7278 5393 3650 2453 1775
08-24 57° 87° 7328 5433 3680 2475 1793
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 69° 89° 7386 5480 3717 2504 1817
08-26 74° 92° 7447 5532 3759 2538 1845
08-27 72° 94° 7508 5583 3800 2571 1873
08-28 71° 83° 7563 5628 3835 2598 1895
08-29 69° 85° 7618 5673 3870 2625 1917
08-30 73° 89° 7677 5722 3909 2655 1943
08-31 68° 81° 7729 5764 3941 2680 1962
09-01 63° 75° 7776 5801 3968 2698 1976
09-02 53° 72° 7817 5831 3988 2711 1984
09-03 52° 76° 7858 5863 4010 2725 1993
09-04 52° 82° 7904 5898 4035 2742 2005
09-05 61° 86° 7955 5940 4067 2765 2023
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 61° 76° 8001 5976 4093 2784 2036
09-07 53° 63° 8037 6002 4109 2792 2039
09-08 46° 70° 8073 6028 4125 2800 2042
09-09 52° 79° 8117 6061 4148 2815 2053
09-10 53° 81° 8162 6096 4173 2832 2065
09-11 54° 85° 8210 6134 4201 2852 2080
09-12 59° 87° 8260 6175 4232 2875 2097
09-13 62° 84° 8311 6216 4263 2898 2115
09-14 63° 87° 8364 6259 4296 2923 2136
09-15 62° 88° 8418 6302 4329 2948 2156
09-16 60° 87° 8469 6344 4361 2972 2174
09-17 56° 82° 8516 6381 4388 2991 2188
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 55° 84° 8564 6419 4416 3011 2203
09-19 57° 87° 8614 6459 4446 3032 2220
09-20 65° 83° 8666 6501 4478 3057 2239
09-21 59° 89° 8718 6543 4510 3081 2258
09-22 67° 70° 8765 6579 4536 3099 2272
09-23 62° 67° 8807 6612 4559 3114 2281
09-24 63° 69° 8851 6645 4582 3129 2292
09-25 58° 73° 8895 6679 4606 3145 2303
09-26 52° 75° 8936 6711 4628 3159 2311
09-27 62° 72° 8981 6746 4653 3175 2323
09-28 61° 70° 9024 6779 4676 3191 2334
09-29 63° 73° 9071 6815 4702 3209 2347
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 60° 74° 9116 6850 4727 3226 2359

 

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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