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MSU Proxy/Primo Seedhead Timer (GDD 32)
through Fri, May. 8. 2026

 

GDD Total: 1378 (Base 32) through Fri, May. 8, 2026

  

Hobart, IN

        

Forecast »

“Flashback” to 2025

5/2

5/3

5/4

5/5

5/6

5/7

5/8

5/9

5/10

5/11

5/12

5/13

5/14

Done

651

Over

501

Target

220

Close

121

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 32° 61° 24 14 4 0 0
02-16 36° 65° 53 33 13 1 0
02-17 42° 58° 81 51 21 1 0
02-18 46° 66° 115 75 35 7 1
02-19 39° 59° 142 92 42 7 1
02-20 26° 51° 158 98 42 7 1
02-21 25° 30° 164 98 42 7 1
02-22 20° 25° 164 98 42 7 1
02-23 19° 25° 165 98 42 7 1
02-24 18° 37° 170 98 42 7 1
02-25 28° 38° 181 99 42 7 1
02-26 21° 42° 191 99 42 7 1
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 29° 64° 215 113 46 7 1
02-28 29° 50° 233 121 46 7 1
03-01 26° 33° 240 121 46 7 1
03-02 23° 44° 252 123 46 7 1
03-03 33° 42° 267 128 46 7 1
03-04 35° 44° 285 135 46 7 1
03-05 41° 47° 307 147 48 7 1
03-06 44° 78° 346 177 67 18 7
03-07 40° 64° 376 197 77 20 7
03-08 34° 63° 403 213 84 20 7
03-09 47° 74° 441 242 103 30 13
03-10 37° 65° 470 261 112 31 13
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 35° 55° 493 274 114 31 13
03-12 29° 45° 508 279 114 31 13
03-13 36° 47° 528 289 114 31 13
03-14 31° 36° 540 290 114 31 13
03-15 34° 65° 568 308 122 31 13
03-16 21° 35° 574 308 122 31 13
03-17 16° 25° 574 308 122 31 13
03-18 23° 47° 587 311 122 31 13
03-19 33° 60° 611 326 127 31 13
03-20 44° 72° 647 351 142 39 15
03-21 39° 67° 678 372 153 42 15
03-22 34° 67° 706 390 161 42 15
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 29° 37° 717 391 161 42 15
03-24 27° 51° 734 398 161 42 15
03-25 40° 71° 768 422 175 48 16
03-26 35° 78° 802 447 189 54 18
03-27 32° 37° 815 449 189 54 18
03-28 28° 48° 831 456 189 54 18
03-29 39° 64° 861 475 199 56 18
03-30 54° 81° 906 511 225 73 30
03-31 40° 72° 940 535 238 79 31
04-01 38° 43° 959 543 238 79 31
04-02 39° 72° 992 567 252 85 32
04-03 42° 67° 1025 589 265 89 32
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 42° 63° 1055 610 275 92 32
04-05 38° 52° 1078 622 278 92 32
04-06 37° 51° 1100 634 280 92 32
04-07 30° 38° 1112 636 280 92 32
04-08 34° 70° 1142 656 290 94 32
04-09 59° 71° 1184 689 313 109 41
04-10 42° 57° 1212 706 320 109 41
04-11 34° 58° 1236 721 324 109 41
04-12 55° 82° 1283 757 351 127 55
04-13 64° 81° 1333 797 381 149 72
04-14 59° 84° 1383 837 411 171 89
04-15 66° 77° 1432 877 440 193 106
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 51° 71° 1472 906 460 204 112
04-17 47° 83° 1514 939 482 219 122
04-18 43° 68° 1548 962 496 224 122
04-19 35° 50° 1568 973 496 224 122
04-20 31° 56° 1590 984 498 224 122
04-21 47° 79° 1631 1015 519 237 130
04-22 48° 71° 1668 1043 536 246 134
04-23 48° 82° 1711 1076 559 261 144
04-24 60° 71° 1755 1110 583 277 155
04-25 41° 59° 1783 1128 591 277 155
04-26 39° 63° 1812 1146 600 278 155
04-27 53° 67° 1850 1174 618 288 160
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 53° 63° 1885 1200 633 295 162
04-29 41° 56° 1912 1216 640 295 162
04-30 35° 55° 1935 1229 643 295 162
05-01 38° 47° 1955 1239 643 295 162
05-02 31° 55° 1976 1250 644 295 162
05-03 42° 65° 2007 1272 655 299 162
05-04 49° 80° 2050 1304 678 313 172
05-05 43° 59° 2079 1323 687 314 172
05-06 42° 57° 2106 1341 694 314 172
05-07 36° 59° 2131 1356 700 314 172
05-08 44° 64° 2164 1378 712 319 172
05-09 51° 69° 2202 1406 730 329 177
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 45° 57° 2231 1425 739 330 177
05-11 43° 54° 2258 1442 746 330 177
05-12 41° 63° 2288 1462 756 332 177
05-13 48° 57° 2318 1482 766 334 177
05-14 44° 64° 2350 1504 778 338 177
05-15 52° 76° 2392 1536 800 352 186
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 1° 14° 9 0 0 0 0
02-18 -2° 14° 9 0 0 0 0
02-19 7° 19° 9 0 0 0 0
02-20 3° 25° 9 0 0 0 0
02-21 10° 31° 9 0 0 0 0
02-22 13° 36° 11 0 0 0 0
02-23 23° 46° 24 2 0 0 0
02-24 36° 55° 47 16 3 0 0
02-25 35° 55° 70 29 6 0 0
02-26 33° 50° 89 38 6 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 35° 50° 110 49 7 0 0
02-28 31° 59° 133 62 10 0 0
03-01 19° 39° 140 62 10 0 0
03-02 16° 36° 145 62 10 0 0
03-03 29° 44° 160 67 10 0 0
03-04 42° 47° 183 80 13 0 0
03-05 29° 52° 201 88 13 0 0
03-06 27° 40° 213 90 13 0 0
03-07 31° 38° 225 93 13 0 0
03-08 31° 49° 243 101 13 0 0
03-09 31° 58° 266 113 16 0 0
03-10 39° 67° 297 134 27 3 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 36° 58° 322 149 31 3 0
03-12 33° 52° 343 160 32 3 0
03-13 34° 64° 369 177 39 3 0
03-14 47° 79° 410 208 60 16 8
03-15 48° 70° 448 235 77 25 12
03-16 30° 45° 463 240 77 25 12
03-17 26° 53° 480 248 77 25 12
03-18 46° 74° 518 276 95 35 17
03-19 36° 63° 546 293 103 35 17
03-20 31° 41° 560 297 103 35 17
03-21 29° 58° 581 309 105 35 17
03-22 32° 50° 601 318 105 35 17
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 32° 48° 619 326 105 35 17
03-24 34° 49° 639 336 105 35 17
03-25 30° 46° 655 342 105 35 17
03-26 29° 51° 673 350 105 35 17
03-27 39° 57° 699 366 110 35 17
03-28 48° 81° 741 399 133 50 27
03-29 58° 68° 783 430 154 63 35
03-30 49° 79° 825 462 177 78 44
03-31 34° 47° 843 471 177 78 44
04-01 30° 48° 860 478 177 78 44
04-02 39° 67° 891 499 188 81 44
04-03 44° 64° 924 521 200 85 44
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 38° 53° 947 534 203 85 44
04-05 40° 47° 969 546 205 85 44
04-06 35° 46° 987 555 205 85 44
04-07 32° 44° 1003 560 205 85 44
04-08 28° 41° 1015 562 205 85 44
04-09 31° 42° 1030 567 205 85 44
04-10 38° 45° 1049 577 205 85 44
04-11 34° 48° 1068 586 205 85 44
04-12 30° 59° 1091 598 208 85 44
04-13 52° 63° 1126 623 223 92 47
04-14 53° 64° 1163 650 240 101 51
04-15 39° 55° 1188 665 245 101 51
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 33° 46° 1206 673 245 101 51
04-17 36° 67° 1235 692 254 102 51
04-18 59° 80° 1283 730 282 122 65
04-19 41° 69° 1316 753 295 127 66
04-20 47° 66° 1350 778 309 133 67
04-21 51° 62° 1385 802 324 140 69
04-22 40° 73° 1420 827 339 147 70
04-23 52° 78° 1463 860 362 162 81
04-24 49° 79° 1504 892 384 175 89
04-25 43° 62° 1535 912 394 178 89
04-26 41° 49° 1558 926 398 178 89
04-27 33° 70° 1588 945 407 180 89
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 51° 84° 1634 981 433 197 102
04-29 51° 78° 1676 1013 455 212 111
04-30 43° 65° 1708 1035 467 216 111
05-01 53° 71° 1748 1065 487 228 118
05-02 45° 60° 1779 1086 498 231 118
05-03 43° 51° 1804 1101 503 231 118
05-04 43° 49° 1828 1116 507 231 118
05-05 47° 61° 1860 1137 519 234 118
05-06 45° 76° 1899 1166 538 245 124
05-07 46° 74° 1937 1194 556 255 129
05-08 44° 59° 1966 1213 565 256 129
05-09 38° 58° 1992 1229 571 256 129
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 40° 74° 2027 1254 586 264 131
05-11 42° 70° 2061 1279 600 270 132
05-12 49° 78° 2103 1310 622 283 141
05-13 61° 77° 2150 1347 649 302 155
05-14 58° 77° 2195 1383 675 320 167
05-15 63° 93° 2251 1429 710 348 190
05-16 62° 87° 2304 1471 743 372 210
05-17 55° 72° 2345 1503 764 386 218
05-18 48° 61° 2378 1525 777 390 218
05-19 45° 53° 2405 1543 784 390 218
05-20 48° 57° 2436 1563 795 393 218
05-21 49° 54° 2466 1583 805 395 218
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 46° 54° 2494 1601 813 395 218
05-23 38° 57° 2520 1617 819 395 218
05-24 41° 63° 2550 1637 829 397 218
05-25 51° 65° 2586 1663 845 405 221
05-26 44° 64° 2618 1685 857 409 221
05-27 54° 67° 2656 1713 875 419 226
05-28 53° 59° 2690 1737 889 425 228
05-29 51° 70° 2729 1766 908 436 233
05-30 54° 74° 2771 1798 930 450 242
05-31 48° 63° 2804 1821 943 455 242
06-01 41° 63° 2834 1841 953 457 242
06-02 43° 84° 2875 1872 974 470 251
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 67° 89° 2931 1918 1010 498 274
06-04 57° 80° 2977 1954 1036 516 287
06-05 56° 65° 3016 1983 1055 527 292
06-06 59° 74° 3061 2018 1080 544 304
06-07 56° 78° 3106 2053 1105 561 316
06-08 61° 83° 3156 2093 1135 583 333
06-09 55° 77° 3199 2126 1158 598 344
06-10 54° 79° 3244 2161 1183 615 355
06-11 63° 92° 3299 2206 1218 642 377
06-12 64° 83° 3350 2247 1249 665 396
06-13 63° 75° 3397 2284 1276 684 409
06-14 63° 72° 3442 2320 1301 701 422
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 58° 79° 3489 2356 1328 720 435
06-16 62° 87° 3541 2398 1360 744 454
06-17 71° 92° 3601 2448 1400 776 481
06-18 68° 84° 3655 2492 1434 802 502
06-19 64° 81° 3706 2533 1465 825 520
06-20 66° 85° 3759 2577 1499 851 541
06-21 75° 94° 3822 2629 1541 885 571
06-22 79° 95° 3887 2684 1586 922 603
06-23 78° 95° 3952 2739 1631 959 634
06-24 75° 96° 4015 2793 1674 994 665
06-25 70° 86° 4071 2839 1711 1023 688
06-26 75° 92° 4133 2890 1752 1056 717
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 75° 90° 4194 2941 1793 1089 744
06-28 68° 86° 4249 2986 1828 1116 766
06-29 71° 89° 4307 3034 1866 1146 791
06-30 73° 88° 4366 3083 1905 1177 817
07-01 70° 84° 4420 3128 1940 1204 839
07-02 66° 89° 4476 3173 1975 1231 862
07-03 69° 91° 4534 3221 2013 1261 886
07-04 72° 90° 4593 3270 2052 1292 913
07-05 73° 94° 4655 3322 2094 1326 941
07-06 70° 88° 4711 3369 2131 1355 965
07-07 67° 78° 4762 3409 2161 1377 982
07-08 63° 90° 4817 3454 2196 1404 1004
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 69° 82° 4870 3497 2229 1429 1024
07-10 65° 84° 4922 3539 2261 1453 1044
07-11 71° 90° 4980 3588 2300 1484 1069
07-12 72° 85° 5037 3634 2336 1512 1092
07-13 68° 82° 5090 3677 2369 1537 1112
07-14 62° 87° 5142 3719 2401 1561 1132
07-15 66° 92° 5199 3767 2438 1590 1156
07-16 73° 92° 5260 3817 2479 1623 1183
07-17 65° 75° 5307 3855 2506 1642 1198
07-18 60° 80° 5356 3893 2535 1663 1213
07-19 69° 82° 5409 3936 2568 1688 1234
07-20 68° 74° 5458 3976 2597 1709 1250
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 64° 82° 5509 4017 2628 1732 1268
07-22 64° 85° 5562 4059 2661 1757 1287
07-23 66° 92° 5619 4106 2698 1786 1311
07-24 73° 96° 5681 4158 2740 1820 1341
07-25 73° 83° 5737 4204 2776 1848 1364
07-26 72° 81° 5791 4249 2811 1875 1385
07-27 73° 87° 5850 4297 2849 1905 1410
07-28 76° 89° 5910 4348 2889 1937 1438
07-29 70° 93° 5970 4397 2929 1969 1464
07-30 70° 83° 6024 4441 2963 1995 1486
07-31 63° 74° 6071 4478 2990 2014 1499
08-01 59° 74° 6116 4513 3015 2031 1511
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 57° 77° 6161 4548 3040 2048 1524
08-03 57° 78° 6207 4584 3066 2066 1536
08-04 60° 82° 6256 4623 3095 2087 1552
08-05 59° 82° 6304 4662 3123 2107 1568
08-06 62° 86° 6357 4704 3156 2132 1587
08-07 69° 89° 6414 4751 3193 2161 1611
08-08 72° 90° 6473 4800 3232 2192 1637
08-09 71° 92° 6532 4850 3272 2224 1664
08-10 73° 92° 6593 4900 3312 2256 1691
08-11 73° 88° 6652 4949 3351 2287 1717
08-12 71° 90° 6710 4998 3390 2318 1743
08-13 68° 82° 6764 5041 3423 2343 1763
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 63° 82° 6814 5081 3453 2365 1781
08-15 64° 89° 6869 5126 3488 2392 1802
08-16 75° 95° 6931 5179 3531 2427 1832
08-17 70° 81° 6985 5223 3564 2452 1853
08-18 70° 84° 7040 5268 3599 2479 1875
08-19 70° 77° 7092 5309 3631 2503 1893
08-20 68° 73° 7140 5348 3660 2524 1909
08-21 62° 74° 7186 5383 3685 2541 1922
08-22 60° 78° 7233 5421 3712 2560 1936
08-23 64° 84° 7285 5462 3744 2584 1955
08-24 57° 73° 7328 5496 3767 2599 1965
08-25 55° 68° 7368 5525 3787 2611 1971
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 54° 71° 7408 5555 3807 2623 1979
08-27 49° 76° 7449 5586 3828 2636 1986
08-28 59° 74° 7493 5621 3852 2652 1998
08-29 52° 68° 7531 5648 3870 2662 2003
08-30 57° 73° 7574 5681 3893 2677 2013
08-31 52° 74° 7615 5712 3914 2690 2021
09-01 53° 75° 7658 5745 3937 2705 2030
09-02 55° 78° 7702 5779 3961 2721 2041
09-03 57° 74° 7746 5813 3985 2737 2052
09-04 51° 66° 7783 5840 4002 2746 2056
09-05 55° 69° 7822 5869 4021 2757 2063
09-06 45° 66° 7856 5893 4035 2763 2063
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 45° 66° 7889 5916 4048 2768 2064
09-08 43° 71° 7924 5941 4063 2775 2066
09-09 46° 76° 7963 5970 4082 2786 2072
09-10 57° 81° 8010 6008 4109 2805 2086
09-11 61° 79° 8058 6045 4137 2825 2101
09-12 56° 84° 8106 6083 4165 2845 2116
09-13 62° 76° 8153 6120 4192 2864 2129
09-14 61° 83° 8203 6161 4222 2886 2147
09-15 60° 83° 8253 6200 4252 2908 2163
09-16 58° 80° 8300 6237 4279 2927 2177
09-17 57° 82° 8348 6275 4307 2947 2192
09-18 58° 86° 8397 6314 4336 2968 2209
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 60° 89° 8450 6357 4369 2993 2229
09-20 66° 79° 8501 6398 4400 3016 2246
09-21 64° 83° 8552 6439 4431 3039 2265
09-22 65° 80° 8603 6480 4462 3062 2282
09-23 63° 73° 8649 6516 4488 3080 2296
09-24 63° 70° 8694 6551 4513 3097 2307
09-25 59° 72° 8737 6584 4536 3112 2317
09-26 51° 81° 8781 6618 4560 3128 2329
09-27 58° 86° 8831 6658 4590 3150 2346
09-28 59° 79° 8878 6695 4617 3169 2359
09-29 58° 86° 8928 6735 4647 3191 2376
09-30 59° 80° 8976 6773 4675 3211 2391
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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