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Ester/Amine Spring Broadleaf Herbicide Timer - Purdue (GDD 50)
through Wed, Mar. 12. 2025

 

GDD Total: 1 (Base 50) through Wed, Mar. 12, 2025

  

Crown Point, IN

        

Forecast »

“Flashback” to 2024

3/6

3/7

3/8

3/9

3/10

3/11

3/12

3/13

3/14

3/15

3/16

3/17

3/18

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

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 15° 30° 9 0 0 0 0
02-17 0° 12° 9 0 0 0 0
02-18 -4° 14° 9 0 0 0 0
02-19 5° 19° 9 0 0 0 0
02-20 -1° 24° 9 0 0 0 0
02-21 9° 31° 9 0 0 0 0
02-22 12° 37° 11 0 0 0 0
02-23 21° 46° 23 2 0 0 0
02-24 35° 55° 45 15 3 0 0
02-25 34° 56° 69 28 6 0 0
02-26 32° 50° 87 36 6 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 51° 107 46 6 0 0
02-28 29° 59° 129 59 8 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 19° 39° 136 59 8 0 0
03-02 14° 36° 140 59 8 0 0
03-03 27° 43° 152 61 8 0 0
03-04 41° 47° 175 74 10 0 0
03-05 28° 51° 193 82 10 0 0
03-06 26° 39° 203 82 10 0 0
03-07 30° 37° 215 84 10 0 0
03-08 31° 48° 232 91 10 0 0
03-09 31° 57° 254 103 12 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 36° 67° 283 122 21 1 0
03-11 35° 54° 306 135 24 1 0
03-12 33° 58° 329 148 28 1 0
03-13 33° 68° 357 166 36 2 0
03-14 48° 75° 397 196 55 13 6
03-15 54° 69° 436 225 75 25 13
03-16 35° 44° 454 233 75 25 13
03-17 28° 57° 474 243 75 25 13
03-18 44° 68° 508 267 89 31 14
03-19 46° 60° 539 288 100 34 14
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 31° 44° 16 6 0 0 0
02-16 22° 31° 20 6 0 0 0
02-17 11° 24° 20 6 0 0 0
02-18 17° 43° 28 6 0 0 0
02-19 21° 48° 41 8 0 0 0
02-20 27° 55° 60 17 0 0 0
02-21 41° 65° 91 38 11 3 0
02-22 40° 52° 114 52 15 3 0
02-23 30° 47° 131 58 15 3 0
02-24 20° 32° 135 58 15 3 0
02-25 30° 58° 157 70 17 3 0
02-26 35° 70° 188 91 27 5 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 55° 69° 228 120 47 17 7
02-28 24° 61° 248 131 48 17 7
02-29 20° 42° 257 131 48 17 7
03-01 27° 43° 270 134 48 17 7
03-02 35° 57° 294 148 52 17 7
03-03 40° 71° 328 172 65 23 7
03-04 52° 71° 368 201 85 34 14
03-05 38° 62° 396 219 93 34 14
03-06 36° 48° 416 230 93 34 14
03-07 35° 49° 436 240 94 34 14
03-08 41° 52° 461 255 98 34 14
03-09 32° 45° 477 261 98 34 14
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 43° 492 266 98 34 14
03-11 28° 63° 515 279 102 34 14
03-12 41° 68° 548 302 114 39 14
03-13 45° 70° 584 328 130 47 17
03-14 43° 69° 618 352 144 53 18
03-15 36° 44° 636 360 144 53 18
03-16 35° 60° 662 376 150 53 18
03-17 31° 42° 676 380 150 53 18
03-18 27° 33° 684 380 150 53 18
03-19 27° 57° 704 390 150 53 18
03-20 28° 44° 719 394 150 53 18
03-21 23° 40° 728 394 150 53 18
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 31° 48° 746 402 150 53 18
03-23 28° 36° 756 402 150 53 18
03-24 28° 50° 773 409 150 53 18
03-25 42° 67° 805 432 162 57 18
03-26 36° 57° 830 446 167 57 18
03-27 30° 43° 844 450 167 57 18
03-28 26° 51° 861 457 167 57 18
03-29 33° 57° 884 470 170 57 18
03-30 40° 64° 914 490 180 59 18
03-31 37° 52° 937 503 183 59 18
04-01 44° 52° 962 519 188 59 18
04-02 36° 58° 987 533 193 59 18
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 34° 37° 1001 537 193 59 18
04-04 36° 40° 1017 543 193 59 18
04-05 36° 45° 1035 551 193 59 18
04-06 31° 53° 1055 561 193 59 18
04-07 37° 54° 1078 574 197 59 18
04-08 45° 74° 1116 602 214 69 22
04-09 52° 66° 1153 629 231 78 26
04-10 42° 66° 1185 651 243 82 26
04-11 49° 55° 1215 671 253 84 26
04-12 47° 60° 1246 692 265 87 26
04-13 39° 70° 1279 715 277 92 26
04-14 58° 79° 1325 752 304 111 40
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 49° 69° 1363 779 321 120 44
04-16 51° 76° 1405 811 343 134 53
04-17 61° 66° 1446 842 365 147 62
04-18 47° 64° 1480 866 378 153 62
04-19 43° 56° 1507 883 385 153 62
04-20 34° 46° 1525 892 385 153 62
04-21 33° 46° 1543 899 385 153 62
04-22 37° 65° 1572 918 395 154 62
04-23 50° 56° 1603 939 406 157 62
04-24 36° 52° 1625 951 408 157 62
04-25 30° 58° 1647 963 410 157 62
04-26 40° 61° 1675 982 418 158 62
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 58° 76° 1721 1017 443 175 75
04-28 61° 75° 1767 1053 469 193 88
04-29 60° 69° 1809 1086 492 208 97
04-30 48° 75° 1849 1115 511 219 103
05-01 59° 76° 1894 1150 537 236 116
05-02 51° 81° 1938 1185 561 253 127
05-03 53° 65° 1975 1212 578 262 131
05-04 50° 81° 2019 1245 601 277 142
05-05 49° 66° 2054 1270 617 285 144
05-06 46° 74° 2093 1299 635 295 150
05-07 57° 77° 2138 1334 660 312 162
05-08 53° 79° 2182 1368 684 328 173
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 52° 69° 2220 1397 703 339 178
05-10 48° 67° 2256 1422 718 346 180
05-11 50° 65° 2291 1447 734 353 183
05-12 46° 82° 2333 1479 756 367 192
05-13 61° 80° 2382 1518 784 388 207
05-14 53° 63° 2418 1544 800 396 211
05-15 54° 67° 2457 1573 819 407 216
05-16 51° 74° 2497 1603 840 419 224
05-17 59° 80° 2544 1640 867 438 238
05-18 60° 84° 2594 1680 897 460 255
05-19 64° 78° 2643 1719 925 481 271
05-20 61° 89° 2696 1762 958 506 291
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 62° 88° 2749 1805 992 531 311
05-22 65° 79° 2799 1846 1022 554 328
05-23 55° 80° 2845 1881 1048 571 341
05-24 62° 80° 2894 1920 1077 592 357
05-25 59° 73° 2938 1954 1101 608 368
05-26 54° 75° 2981 1987 1123 623 378
05-27 58° 73° 3024 2020 1147 639 388
05-28 54° 72° 3066 2052 1168 652 397
05-29 53° 67° 3104 2080 1186 662 401
05-30 45° 71° 3139 2106 1202 670 404
05-31 49° 79° 3181 2138 1224 684 413
06-01 59° 70° 3224 2170 1247 698 423
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 57° 74° 3267 2203 1270 713 433
06-03 55° 86° 3316 2242 1298 734 449
06-04 68° 86° 3371 2287 1334 761 471
06-05 68° 80° 3423 2329 1365 785 490
06-06 65° 79° 3473 2369 1395 807 507
06-07 59° 78° 3519 2406 1422 826 520
06-08 56° 82° 3566 2443 1449 845 534
06-09 52° 80° 3610 2477 1473 861 545
06-10 54° 64° 3647 2504 1490 870 549
06-11 44° 78° 3686 2533 1509 881 555
06-12 62° 91° 3741 2578 1544 908 577
06-13 72° 91° 3801 2627 1583 939 604
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 65° 86° 3854 2670 1617 965 624
06-15 59° 83° 3904 2710 1646 986 640
06-16 64° 93° 3960 2756 1682 1014 664
06-17 77° 94° 4023 2810 1726 1050 694
06-18 75° 89° 4084 2860 1766 1082 721
06-19 77° 93° 4146 2912 1809 1116 751
06-20 69° 92° 4204 2961 1847 1147 776
06-21 67° 93° 4262 3009 1885 1177 801
06-22 74° 92° 4323 3060 1926 1210 829
06-23 67° 85° 4377 3103 1960 1236 850
06-24 61° 85° 4428 3145 1991 1259 868
06-25 69° 83° 4482 3189 2025 1285 889
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 69° 83° 4537 3233 2059 1311 911
06-27 61° 73° 4582 3268 2085 1328 923
06-28 60° 77° 4629 3305 2112 1347 937
06-29 72° 89° 4688 3354 2150 1378 962
06-30 58° 78° 4734 3390 2176 1396 975
07-01 48° 76° 4774 3420 2196 1408 982
07-02 60° 84° 4824 3460 2226 1430 999
07-03 74° 87° 4882 3508 2265 1460 1025
07-04 68° 82° 4935 3551 2298 1485 1045
07-05 63° 84° 4986 3593 2329 1509 1063
07-06 62° 79° 5035 3631 2358 1529 1079
07-07 60° 89° 5088 3674 2390 1554 1098
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 68° 86° 5142 3719 2425 1581 1120
07-09 69° 76° 5193 3759 2456 1603 1138
07-10 65° 80° 5244 3800 2486 1626 1156
07-11 63° 80° 5293 3839 2516 1647 1172
07-12 64° 85° 5345 3881 2548 1671 1191
07-13 65° 89° 5400 3927 2583 1699 1213
07-14 67° 84° 5454 3970 2617 1724 1234
07-15 67° 88° 5509 4016 2652 1752 1256
07-16 67° 83° 5562 4059 2685 1777 1276
07-17 65° 80° 5613 4099 2716 1799 1294
07-18 61° 72° 5657 4134 2740 1816 1305
07-19 53° 77° 5700 4167 2763 1831 1315
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 56° 79° 5746 4202 2788 1848 1328
07-21 59° 81° 5794 4240 2817 1868 1343
07-22 62° 82° 5844 4280 2847 1890 1360
07-23 62° 84° 5895 4321 2877 1913 1378
07-24 64° 77° 5943 4360 2906 1934 1393
07-25 60° 78° 5991 4397 2934 1953 1408
07-26 52° 80° 6035 4431 2957 1969 1419
07-27 57° 83° 6082 4469 2985 1989 1433
07-28 64° 80° 6133 4509 3015 2011 1450
07-29 70° 85° 6188 4554 3051 2038 1473
07-30 68° 90° 6245 4601 3087 2067 1497
07-31 69° 88° 6301 4647 3124 2095 1520
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 71° 85° 6357 4693 3160 2123 1543
08-02 69° 82° 6410 4736 3193 2148 1563
08-03 67° 89° 6466 4782 3229 2176 1586
08-04 67° 89° 6522 4828 3265 2204 1609
08-05 71° 92° 6581 4877 3304 2235 1635
08-06 69° 80° 6633 4920 3336 2260 1654
08-07 64° 78° 6682 4958 3365 2280 1670
08-08 58° 83° 6730 4996 3393 2301 1685
08-09 61° 74° 6776 5032 3419 2318 1698
08-10 53° 74° 6818 5064 3440 2332 1706
08-11 52° 77° 6860 5096 3463 2347 1716
08-12 52° 78° 6903 5129 3486 2362 1726
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 53° 83° 6949 5165 3512 2380 1739
08-14 56° 85° 6998 5204 3540 2400 1754
08-15 65° 74° 7045 5241 3568 2420 1769
08-16 67° 86° 7100 5286 3603 2446 1791
08-17 66° 76° 7149 5325 3632 2467 1807
08-18 66° 74° 7197 5363 3659 2487 1822
08-19 62° 74° 7243 5399 3685 2505 1834
08-20 52° 70° 7282 5428 3705 2516 1841
08-21 48° 75° 7321 5457 3724 2527 1847
08-22 48° 77° 7361 5488 3744 2540 1854
08-23 49° 80° 7404 5520 3767 2555 1864
08-24 55° 89° 7455 5561 3797 2577 1881
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 68° 90° 7512 5608 3834 2606 1906
08-26 74° 93° 7573 5659 3876 2639 1934
08-27 73° 96° 7636 5712 3918 2674 1964
08-28 69° 84° 7691 5757 3953 2701 1985
08-29 68° 88° 7746 5803 3989 2729 2008
08-30 72° 90° 7806 5852 4028 2760 2035
08-31 66° 83° 7858 5895 4061 2785 2054
09-01 61° 75° 7905 5931 4087 2803 2067
09-02 50° 74° 7945 5961 4107 2815 2075
09-03 49° 76° 7985 5992 4128 2828 2082
09-04 49° 83° 8029 6025 4152 2843 2093
09-05 60° 87° 8081 6067 4183 2867 2112
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 59° 75° 8125 6101 4208 2884 2123
09-07 49° 64° 8160 6126 4223 2890 2125
09-08 43° 71° 8195 6151 4237 2897 2127
09-09 49° 80° 8237 6183 4260 2912 2136
09-10 49° 82° 8281 6217 4283 2927 2147
09-11 50° 86° 8327 6253 4310 2945 2160
09-12 56° 88° 8377 6293 4340 2967 2177
09-13 60° 85° 8428 6334 4370 2990 2195
09-14 61° 89° 8481 6377 4403 3015 2215
09-15 61° 88° 8533 6419 4436 3039 2234
09-16 56° 89° 8584 6460 4466 3062 2252
09-17 54° 85° 8631 6497 4494 3081 2266
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 53° 88° 8679 6536 4522 3102 2281
09-19 55° 89° 8729 6575 4552 3124 2298
09-20 63° 85° 8782 6618 4584 3148 2317
09-21 59° 91° 8834 6661 4617 3173 2337
09-22 65° 71° 8881 6697 4643 3191 2350
09-23 60° 66° 8922 6728 4664 3204 2358
09-24 62° 68° 8965 6761 4687 3219 2368
09-25 57° 75° 9009 6795 4711 3235 2380
09-26 50° 77° 9050 6826 4733 3248 2388
09-27 62° 73° 9095 6862 4758 3266 2400
09-28 61° 70° 9139 6895 4781 3281 2411
09-29 64° 75° 9186 6933 4809 3301 2425
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 59° 76° 9232 6968 4835 3318 2438

 

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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