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Ester/Amine Spring Broadleaf Herbicide Timer - Purdue (GDD 50)
forecast for Mon, Apr. 1. 2024

 

Forecasted GDD Total: 110 (Base 50) through Mon, Apr. 1, 2024

  

Indianapolis, IN

       

Forecast »

Over

601

Amine

201

Ester or Amine

151

Ester

110

Early

71

Under

0

 

Generously Supported By:



Tabular Data

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

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 23° 34° 26 9 0 0 0
02-17 14° 22° 26 9 0 0 0
02-18 14° 36° 28 9 0 0 0
02-19 19° 46° 39 10 0 0 0
02-20 30° 56° 60 21 1 0 0
02-21 35° 65° 88 39 9 0 0
02-22 42° 55° 114 55 16 0 0
02-23 35° 52° 135 66 17 0 0
02-24 26° 42° 148 68 17 0 0
02-25 26° 59° 168 79 17 0 0
02-26 35° 72° 199 100 28 3 0
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 59° 67° 240 131 49 16 8
02-28 28° 69° 267 147 56 16 8
02-29 22° 43° 277 148 56 16 8
03-01 30° 43° 291 152 56 16 8
03-02 40° 51° 315 166 60 16 8
03-03 39° 67° 346 187 71 19 8
03-04 54° 76° 389 220 94 34 18
03-05 54° 63° 426 247 110 43 22
03-06 45° 53° 453 264 117 43 22
03-07 43° 48° 477 278 121 43 22
03-08 46° 56° 506 297 130 44 22
03-09 39° 55° 531 312 136 44 22
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 31° 46° 547 318 136 44 22
03-11 27° 59° 568 329 137 44 22
03-12 41° 68° 601 352 149 49 22
03-13 45° 74° 639 380 167 58 26
03-14 56° 72° 680 411 189 72 35
03-15 44° 60° 710 431 198 74 35
03-16 36° 61° 737 448 205 74 35
03-17 36° 47° 757 458 205 74 35
03-18 30° 34° 767 458 205 74 35
03-19 26° 54° 785 466 205 74 35
03-20 33° 50° 805 476 205 74 35
03-21 24° 42° 816 477 205 74 35
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 32° 44° 832 483 205 74 35
03-23 31° 44° 847 488 205 74 35
03-24 30° 52° 867 497 205 74 35
03-25 44° 68° 900 521 219 80 36
03-26 42° 62° 931 542 229 82 36
03-27 35° 45° 949 550 229 82 36
03-28 29° 55° 969 560 230 82 36
03-29 40° 65° 1000 581 240 85 36
03-30 52° 66° 1037 608 257 94 40
03-31 44° 63° 1068 629 269 98 40
04-01 55° 69° 1109 659 289 110 47
04-02 47° 55° 1138 678 298 111 47
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 36° 53° 1160 691 301 111 47
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 44° 65° 33 23 13 5 0
02-16 38° 58° 59 39 19 5 0
02-17 26° 35° 68 39 19 5 0
02-18 21° 47° 80 41 19 5 0
02-19 39° 57° 106 57 25 5 0
02-20 36° 58° 131 72 30 5 0
02-21 39° 48° 152 84 32 5 0
02-22 40° 67° 184 105 43 8 0
02-23 32° 68° 212 123 51 8 0
02-24 25° 38° 222 123 51 8 0
02-25 32° 49° 240 132 51 8 0
02-26 30° 56° 261 143 52 8 0
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 47° 62° 294 165 65 13 0
02-28 40° 50° 317 179 68 13 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 40° 76° 353 205 84 21 3
03-02 36° 52° 375 217 86 21 3
03-03 34° 44° 392 224 86 21 3
03-04 31° 53° 412 234 86 21 3
03-05 34° 57° 436 248 90 21 3
03-06 42° 74° 472 274 106 29 6
03-07 37° 49° 493 285 107 29 6
03-08 32° 50° 512 294 107 29 6
03-09 32° 52° 532 304 107 29 6
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 36° 41° 549 310 107 29 6
03-11 33° 46° 566 318 107 29 6
03-12 33° 38° 580 321 107 29 6
03-13 30° 35° 590 322 107 29 6
03-14 26° 39° 600 322 107 29 6
03-15 22° 50° 614 326 107 29 6
03-16 34° 57° 638 340 111 29 6
03-17 31° 53° 658 350 111 29 6
03-18 21° 30° 662 350 111 29 6
03-19 16° 36° 666 350 111 29 6
03-20 24° 50° 681 355 111 29 6
03-21 31° 54° 701 365 111 29 6
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 41° 53° 726 380 116 29 6
03-23 46° 65° 760 404 130 35 7
03-24 40° 45° 781 415 131 35 7
03-25 38° 50° 803 427 133 35 7
03-26 32° 64° 830 443 140 35 7
03-27 41° 52° 854 458 144 35 7
03-28 30° 49° 871 465 144 35 7
03-29 31° 54° 892 476 145 35 7
03-30 30° 60° 915 489 148 35 7
03-31 48° 66° 950 514 163 42 9
04-01 39° 60° 978 532 170 42 9
04-02 35° 55° 1001 545 174 42 9
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 44° 74° 1038 572 191 51 13
04-04 56° 78° 1083 607 216 68 25
04-05 48° 75° 1123 637 235 80 32
04-06 40° 51° 1146 650 239 80 32
04-07 35° 58° 1171 665 243 80 32
04-08 40° 61° 1199 683 251 80 32
04-09 38° 64° 1228 702 260 81 32
04-10 38° 69° 1260 724 272 85 32
04-11 39° 75° 1295 748 287 92 34
04-12 51° 78° 1337 781 310 106 43
04-13 46° 80° 1378 812 331 119 51
04-14 54° 79° 1423 847 355 136 63
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 59° 79° 1470 884 382 155 77
04-16 41° 70° 1503 907 396 161 78
04-17 36° 47° 1523 917 396 161 78
04-18 31° 62° 1548 932 401 161 78
04-19 43° 81° 1588 961 420 173 84
04-20 60° 84° 1638 1001 450 195 101
04-21 47° 69° 1674 1028 467 203 105
04-22 41° 51° 1698 1042 471 203 105
04-23 36° 44° 1716 1050 471 203 105
04-24 29° 52° 1735 1059 471 203 105
04-25 38° 58° 1761 1074 476 203 105
04-26 37° 60° 1787 1091 483 203 105
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-27 37° 64° 1816 1110 492 203 105
04-28 46° 55° 1844 1128 500 204 105
04-29 42° 69° 1877 1151 513 209 105
04-30 41° 50° 1901 1165 517 209 105
05-01 41° 45° 1922 1176 518 209 105
05-02 41° 56° 1948 1192 524 209 105
05-03 39° 59° 1976 1210 532 209 105
05-04 37° 67° 2006 1230 542 211 105
05-05 45° 75° 2044 1258 560 221 110
05-06 56° 75° 2087 1291 583 237 120
05-07 60° 77° 2134 1328 610 255 134
05-08 61° 78° 2181 1365 637 275 148
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-09 55° 74° 2224 1398 660 289 158
05-10 49° 78° 2265 1429 681 303 166
05-11 52° 82° 2310 1464 706 320 179
05-12 64° 79° 2360 1504 736 341 195
05-13 67° 80° 2412 1546 768 365 214
05-14 64° 77° 2460 1584 796 386 230
05-15 52° 73° 2501 1615 817 398 237
05-16 56° 65° 2539 1643 835 409 243
05-17 52° 71° 2579 1673 855 420 249
05-18 44° 75° 2616 1700 872 430 253
05-19 50° 80° 2659 1733 895 445 264
05-20 54° 66° 2697 1761 913 455 268
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-21 45° 78° 2736 1790 932 466 275
05-22 52° 78° 2779 1823 955 481 284
05-23 54° 82° 2825 1859 981 499 298
05-24 57° 84° 2873 1897 1009 519 313
05-25 49° 70° 2911 1925 1027 529 318
05-26 48° 77° 2951 1955 1047 541 325
05-27 51° 77° 2993 1987 1069 555 333
05-28 60° 80° 3041 2025 1097 575 348
05-29 53° 86° 3089 2063 1125 594 363
05-30 60° 84° 3139 2103 1155 617 381
05-31 65° 86° 3193 2147 1189 642 401
06-01 64° 88° 3247 2191 1223 668 422
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-02 60° 91° 3300 2234 1256 694 442
06-03 66° 91° 3356 2280 1292 722 465
06-04 64° 83° 3407 2321 1323 745 484
06-05 54° 81° 3453 2357 1349 763 496
06-06 56° 85° 3501 2395 1377 783 512
06-07 62° 78° 3549 2433 1405 803 527
06-08 52° 77° 3592 2466 1428 818 536
06-09 50° 80° 3636 2499 1451 833 547
06-10 53° 83° 3682 2536 1478 851 560
06-11 60° 68° 3724 2568 1500 865 569
06-12 54° 66° 3762 2596 1518 876 574
06-13 54° 69° 3802 2626 1538 887 581
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-14 60° 78° 3849 2663 1565 906 595
06-15 59° 85° 3899 2703 1595 929 612
06-16 54° 72° 3940 2733 1615 941 620
06-17 55° 82° 3986 2770 1642 959 633
06-18 57° 81° 4033 2807 1669 979 647
06-19 68° 78° 4084 2848 1700 1001 665
06-20 69° 85° 4139 2893 1735 1028 687
06-21 68° 87° 4194 2938 1770 1056 710
06-22 65° 77° 4243 2977 1799 1077 725
06-23 66° 80° 4294 3018 1830 1100 743
06-24 65° 89° 4349 3063 1865 1126 765
06-25 71° 88° 4406 3110 1902 1156 790
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-26 67° 79° 4457 3151 1933 1179 808
06-27 63° 75° 4504 3188 1960 1198 822
06-28 58° 83° 4553 3227 1989 1218 837
06-29 65° 87° 4607 3271 2023 1245 859
06-30 65° 90° 4663 3316 2058 1272 881
07-01 68° 85° 4717 3361 2093 1299 902
07-02 68° 84° 4771 3405 2127 1325 923
07-03 68° 82° 4824 3448 2160 1350 943
07-04 65° 89° 4879 3493 2195 1377 966
07-05 68° 89° 4936 3540 2232 1406 989
07-06 71° 85° 4992 3586 2268 1434 1012
07-07 63° 86° 5045 3629 2301 1458 1032
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-08 65° 77° 5094 3668 2330 1480 1048
07-09 61° 81° 5143 3707 2359 1501 1064
07-10 61° 85° 5194 3748 2390 1523 1082
07-11 63° 86° 5246 3790 2422 1548 1102
07-12 67° 87° 5302 3835 2457 1575 1124
07-13 71° 82° 5356 3880 2492 1601 1145
07-14 63° 89° 5410 3924 2526 1627 1166
07-15 70° 82° 5464 3968 2560 1653 1187
07-16 65° 85° 5517 4010 2592 1678 1207
07-17 64° 83° 5568 4052 2624 1701 1225
07-18 62° 80° 5617 4091 2653 1723 1241
07-19 63° 85° 5669 4133 2685 1746 1260
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-20 70° 85° 5725 4178 2720 1774 1283
07-21 63° 80° 5774 4218 2750 1796 1299
07-22 61° 82° 5823 4257 2779 1817 1316
07-23 61° 83° 5873 4297 2809 1839 1332
07-24 65° 86° 5927 4341 2843 1864 1353
07-25 63° 87° 5980 4384 2876 1889 1373
07-26 71° 88° 6037 4431 2913 1919 1397
07-27 75° 89° 6097 4481 2953 1951 1425
07-28 73° 91° 6157 4531 2993 1983 1452
07-29 70° 84° 6212 4576 3028 2010 1474
07-30 67° 86° 6266 4620 3062 2036 1495
07-31 63° 81° 6316 4660 3092 2058 1512
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-01 57° 82° 6364 4698 3120 2078 1526
08-02 60° 82° 6413 4737 3149 2098 1542
08-03 66° 86° 6467 4781 3183 2124 1563
08-04 63° 89° 6520 4824 3216 2150 1584
08-05 68° 86° 6575 4869 3251 2177 1606
08-06 67° 77° 6626 4909 3281 2199 1623
08-07 67° 74° 6674 4948 3310 2219 1638
08-08 61° 81° 6723 4986 3338 2240 1654
08-09 62° 79° 6771 5025 3367 2261 1669
08-10 66° 79° 6822 5066 3398 2283 1687
08-11 65° 83° 6874 5108 3430 2307 1706
08-12 70° 86° 6930 5154 3466 2336 1729
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-13 62° 86° 6982 5196 3498 2360 1748
08-14 67° 75° 7031 5235 3527 2381 1765
08-15 63° 71° 7076 5270 3552 2398 1777
08-16 56° 79° 7122 5306 3578 2415 1789
08-17 59° 76° 7167 5341 3603 2433 1802
08-18 55° 76° 7211 5374 3626 2448 1812
08-19 55° 80° 7256 5410 3652 2466 1824
08-20 63° 89° 7310 5454 3686 2492 1845
08-21 75° 91° 7372 5505 3727 2525 1874
08-22 73° 87° 7429 5553 3765 2555 1899
08-23 68° 91° 7487 5601 3803 2585 1923
08-24 78° 93° 7550 5654 3846 2620 1954
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-25 79° 91° 7613 5707 3889 2655 1984
08-26 71° 86° 7670 5754 3926 2683 2007
08-27 65° 79° 7720 5794 3956 2706 2024
08-28 57° 79° 7766 5830 3982 2724 2038
08-29 53° 83° 7812 5866 4008 2742 2050
08-30 59° 73° 7856 5900 4032 2758 2061
08-31 51° 76° 7898 5932 4054 2771 2070
09-01 53° 83° 7943 5967 4079 2789 2083
09-02 59° 89° 7996 6009 4111 2813 2102
09-03 69° 88° 8052 6056 4148 2842 2126
09-04 65° 88° 8107 6101 4183 2869 2147
09-05 71° 88° 8164 6148 4220 2898 2172
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-06 70° 83° 8219 6193 4255 2925 2193
09-07 66° 74° 8267 6231 4283 2944 2208
09-08 62° 74° 8313 6267 4309 2963 2221
09-09 62° 74° 8359 6303 4335 2981 2235
09-10 55° 78° 8404 6338 4360 2998 2247
09-11 55° 81° 8451 6374 4386 3016 2260
09-12 61° 72° 8495 6409 4411 3032 2271
09-13 50° 75° 8535 6439 4431 3045 2279
09-14 48° 74° 8575 6469 4451 3056 2285
09-15 50° 76° 8616 6500 4472 3069 2293
09-16 49° 73° 8655 6528 4490 3080 2299
09-17 51° 72° 8694 6558 4510 3091 2305
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-18 53° 71° 8734 6588 4530 3104 2312
09-19 48° 77° 8774 6618 4550 3116 2320
09-20 53° 81° 8820 6654 4576 3133 2332
09-21 62° 80° 8869 6693 4605 3155 2348
09-22 57° 82° 8917 6731 4633 3175 2363
09-23 54° 79° 8961 6765 4657 3191 2375
09-24 50° 82° 9005 6799 4681 3207 2385
09-25 57° 82° 9052 6836 4708 3226 2400
09-26 60° 80° 9100 6874 4736 3246 2414
09-27 62° 76° 9147 6911 4763 3265 2428
09-28 61° 73° 9192 6946 4788 3282 2441
09-29 58° 76° 9237 6981 4813 3299 2453
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-30 55° 82° 9284 7018 4840 3317 2466

 

Latest Updates

March 18th, 2024Timing crabgrass preemergence applications in spring

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


 

February 12th, 2024Welcome to the 2024 GDD Tracking Season

2024 might be the year that if you blinked you missed winter. We've already experienced some very unseasonably warm weather in February with temperatures in the 60's. Temperatures are remaining relatively mild but I wouldn't be surprised if winter resurfaced yet as we move through the rest of February and March. GDDTracker starts counting on February 15. Spring is typically the time of year when GDDTracker receives the most attention for alerting turfgrass managers of optimal application timing windows for suppressing annual bluegrass seedheads and crabgrass preemergence applications. However, there are many models you may find helpful throughout the season including the early season DMI timer and 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 fantastic 2024!