Please Note

The GDD models have only been “ground-truthed” in the Great Lakes region. Use of models outside of this region, including the North East, Great Plains and Transition Zones, should be used with caution. We do not recommend the GDD models we use for the mid/southern transition zone and southern states.

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MSU Annual Bluegrass Seedhead Embark Timer (GDD 22)
through Sun, Mar. 8. 2026

 

GDD Total: 234 (Base 22) through Sun, Mar. 8, 2026

  

Apple Valley, MN

        

Forecast »

“Flashback” to 2025

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

Done

1450

Over

1050

Target

680

Close

380

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° 52° 19 9 0 0 0
02-16 36° 55° 43 23 4 0 0
02-17 37° 49° 63 33 4 0 0
02-18 27° 43° 77 37 4 0 0
02-19 23° 32° 82 37 4 0 0
02-20 16° 31° 84 37 4 0 0
02-21 7° 17° 84 37 4 0 0
02-22 5° 14° 84 37 4 0 0
02-23 0° 20° 84 37 4 0 0
02-24 16° 36° 87 37 4 0 0
02-25 8° 21° 87 37 4 0 0
02-26 12° 39° 91 37 4 0 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 27° 49° 107 43 4 0 0
02-28 17° 24° 107 43 4 0 0
03-01 13° 27° 107 43 4 0 0
03-02 18° 39° 114 43 4 0 0
03-03 34° 47° 132 51 4 0 0
03-04 30° 47° 149 58 4 0 0
03-05 39° 52° 172 71 8 0 0
03-06 44° 52° 198 87 13 0 0
03-07 26° 41° 209 88 13 0 0
03-08 36° 57° 234 103 18 0 0
03-09 43° 58° 263 122 27 1 0
03-10 33° 42° 278 127 27 1 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 27° 40° 290 129 27 1 0
03-12 24° 41° 301 130 27 1 0
03-13 28° 36° 311 130 27 1 0
03-14 25° 38° 320 130 27 1 0
03-15 27° 29° 327 130 27 1 0
03-16 7° 17° 327 130 27 1 0
03-17 -2° 19° 327 130 27 1 0
03-18 11° 33° 327 130 27 1 0
03-19 25° 45° 340 133 27 1 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 15° 21° 0 0 0 0 0
02-16 1° 14° 0 0 0 0 0
02-17 -16° -1° 0 0 0 0 0
02-18 -16° 4° 0 0 0 0 0
02-19 -10° 7° 0 0 0 0 0
02-20 -1° 18° 0 0 0 0 0
02-21 2° 25° 0 0 0 0 0
02-22 11° 37° 2 0 0 0 0
02-23 30° 52° 21 9 0 0 0
02-24 40° 50° 44 22 3 0 0
02-25 29° 50° 61 29 3 0 0
02-26 37° 54° 85 43 7 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 49° 104 52 7 0 0
02-28 25° 44° 117 55 7 0 0
03-01 13° 25° 117 55 7 0 0
03-02 13° 42° 123 55 7 0 0
03-03 29° 57° 144 66 8 0 0
03-04 32° 49° 162 75 8 0 0
03-05 23° 32° 168 75 8 0 0
03-06 12° 38° 171 75 8 0 0
03-07 23° 40° 181 75 8 0 0
03-08 26° 47° 195 79 8 0 0
03-09 32° 56° 217 91 9 0 0
03-10 36° 58° 242 106 15 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 29° 50° 260 113 15 0 0
03-12 31° 56° 281 125 16 0 0
03-13 33° 60° 306 140 21 0 0
03-14 49° 74° 346 169 41 12 7
03-15 27° 52° 363 177 41 12 7
03-16 18° 36° 368 177 41 12 7
03-17 31° 61° 392 191 45 12 7
03-18 35° 50° 413 202 45 12 7
03-19 33° 38° 426 205 45 12 7
03-20 25° 45° 439 208 45 12 7
03-21 31° 53° 459 218 45 12 7
03-22 18° 44° 468 218 45 12 7
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 30° 44° 483 223 45 12 7
03-24 23° 48° 497 227 45 12 7
03-25 26° 52° 514 234 45 12 7
03-26 30° 54° 534 244 45 12 7
03-27 39° 61° 562 262 54 12 7
03-28 45° 75° 600 290 72 22 12
03-29 34° 45° 617 297 72 22 12
03-30 31° 35° 628 298 72 22 12
03-31 27° 44° 642 302 72 22 12
04-01 30° 40° 655 305 72 22 12
04-02 32° 38° 668 308 72 22 12
04-03 34° 43° 684 314 72 22 12
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 29° 50° 702 322 72 22 12
04-05 31° 43° 717 327 72 22 12
04-06 26° 59° 737 337 72 22 12
04-07 26° 45° 751 341 72 22 12
04-08 21° 49° 764 344 72 22 12
04-09 35° 61° 790 360 78 22 12
04-10 40° 51° 814 374 82 22 12
04-11 40° 55° 840 390 88 22 12
04-12 38° 68° 871 411 99 25 12
04-13 53° 66° 909 439 117 35 17
04-14 42° 57° 936 456 124 35 17
04-15 37° 54° 960 470 128 35 17
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 33° 60° 985 485 133 35 17
04-17 49° 72° 1023 513 151 46 22
04-18 46° 58° 1053 533 161 48 22
04-19 34° 54° 1075 546 163 48 22
04-20 36° 53° 1098 558 166 48 22
04-21 39° 60° 1126 576 174 48 22
04-22 50° 69° 1163 604 191 57 27
04-23 48° 67° 1199 629 207 65 29
04-24 46° 53° 1226 647 214 65 29
04-25 43° 56° 1254 664 222 65 29
04-26 36° 60° 1281 681 229 65 29
04-27 50° 64° 1316 706 244 72 31
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 57° 71° 1357 738 265 86 40
04-29 42° 59° 1386 756 274 86 40
04-30 38° 68° 1417 777 285 89 40
05-01 52° 61° 1451 802 299 96 42
05-02 45° 52° 1478 818 306 96 42
05-03 43° 65° 1510 840 318 99 42
05-04 46° 79° 1550 870 338 112 49
05-05 52° 75° 1592 902 360 125 58
05-06 50° 82° 1636 936 384 141 69
05-07 55° 71° 1677 967 405 154 77
05-08 46° 70° 1713 993 421 162 80
05-09 47° 84° 1756 1026 444 178 90
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 54° 74° 1798 1058 466 192 99
05-11 57° 89° 1849 1099 497 215 117
05-12 57° 86° 1899 1139 527 236 134
05-13 61° 85° 1950 1180 558 259 152
05-14 62° 85° 2002 1222 590 283 171
05-15 60° 80° 2050 1260 618 303 186
05-16 49° 61° 2083 1283 631 308 186
05-17 43° 49° 2107 1297 635 308 186
05-18 44° 60° 2137 1317 645 310 186
05-19 41° 58° 2164 1334 652 310 186
05-20 42° 49° 2187 1347 655 310 186
05-21 44° 49° 2212 1362 660 310 186
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 43° 64° 2243 1383 671 313 186
05-23 44° 64° 2275 1405 683 317 186
05-24 44° 65° 2308 1428 696 322 186
05-25 44° 70° 2343 1453 711 328 188
05-26 46° 72° 2379 1479 727 337 191
05-27 56° 63° 2417 1507 745 347 196
05-28 54° 60° 2452 1532 760 354 198
05-29 52° 71° 2492 1562 780 366 205
05-30 57° 76° 2536 1596 804 382 216
05-31 57° 81° 2583 1633 831 401 230
06-01 53° 80° 2628 1668 856 418 242
06-02 64° 90° 2683 1713 891 445 264
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 54° 71° 2723 1743 911 457 271
06-04 51° 75° 2764 1774 932 470 279
06-05 53° 77° 2807 1807 955 485 289
06-06 61° 72° 2852 1842 980 502 301
06-07 57° 75° 2896 1876 1004 518 312
06-08 59° 71° 2938 1909 1026 532 321
06-09 51° 66° 2975 1935 1043 541 325
06-10 58° 82° 3023 1973 1071 561 340
06-11 63° 75° 3070 2010 1098 580 354
06-12 58° 70° 3112 2042 1120 593 363
06-13 53° 59° 3145 2065 1133 599 363
06-14 54° 62° 3181 2092 1149 607 366
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 58° 74° 3226 2126 1174 624 378
06-16 66° 80° 3277 2167 1205 647 396
06-17 63° 81° 3327 2207 1235 669 413
06-18 62° 81° 3377 2247 1265 691 430
06-19 61° 87° 3429 2289 1297 714 449
06-20 68° 86° 3483 2333 1331 741 470
06-21 80° 96° 3549 2389 1377 779 503
06-22 81° 94° 3614 2445 1422 816 535
06-23 73° 87° 3672 2493 1460 846 560
06-24 64° 79° 3722 2532 1490 868 577
06-25 65° 72° 3769 2569 1517 887 591
06-26 62° 65° 3810 2600 1538 900 599
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 60° 71° 3854 2634 1562 916 610
06-28 63° 84° 3905 2675 1593 939 628
06-29 68° 81° 3958 2718 1626 964 648
06-30 65° 79° 4008 2758 1656 986 665
07-01 63° 84° 4060 2800 1688 1010 684
07-02 65° 88° 4115 2845 1723 1037 706
07-03 70° 90° 4173 2893 1761 1066 731
07-04 79° 91° 4235 2946 1803 1101 760
07-05 72° 83° 4291 2991 1839 1128 783
07-06 69° 83° 4345 3035 1873 1155 804
07-07 64° 83° 4396 3076 1904 1178 822
07-08 65° 83° 4448 3119 1936 1202 841
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 64° 84° 4500 3161 1968 1226 860
07-10 69° 80° 4553 3203 2001 1251 880
07-11 68° 83° 4607 3247 2035 1276 901
07-12 67° 77° 4656 3286 2064 1298 917
07-13 60° 85° 4707 3327 2095 1321 935
07-14 68° 89° 4763 3373 2131 1349 958
07-15 73° 90° 4823 3423 2171 1381 985
07-16 57° 72° 4865 3455 2193 1395 994
07-17 51° 72° 4905 3485 2213 1407 1001
07-18 58° 74° 4949 3519 2237 1423 1012
07-19 68° 80° 5001 3561 2269 1447 1031
07-20 59° 80° 5048 3599 2296 1466 1045
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 62° 80° 5098 3638 2326 1488 1062
07-22 74° 88° 5157 3687 2365 1519 1088
07-23 73° 81° 5212 3732 2400 1546 1110
07-24 70° 83° 5266 3776 2434 1572 1131
07-25 65° 85° 5320 3820 2468 1597 1152
07-26 68° 87° 5375 3866 2503 1625 1174
07-27 70° 91° 5434 3914 2542 1656 1200
07-28 67° 87° 5489 3959 2577 1683 1222
07-29 66° 85° 5543 4003 2611 1709 1243
07-30 71° 80° 5596 4047 2644 1734 1263
07-31 58° 76° 5642 4082 2670 1752 1276
08-01 60° 77° 5688 4118 2696 1770 1289
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 58° 77° 5733 4153 2721 1787 1301
08-03 60° 77° 5779 4190 2747 1805 1314
08-04 65° 77° 5829 4229 2777 1826 1331
08-05 61° 80° 5877 4267 2805 1847 1346
08-06 68° 81° 5930 4310 2838 1872 1366
08-07 69° 85° 5985 4355 2873 1899 1388
08-08 72° 88° 6043 4403 2911 1929 1413
08-09 72° 83° 6099 4449 2947 1957 1436
08-10 68° 81° 6151 4491 2979 1981 1455
08-11 62° 79° 6200 4530 3008 2002 1471
08-12 67° 81° 6252 4572 3040 2026 1490
08-13 60° 82° 6301 4611 3069 2047 1506
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 67° 76° 6350 4651 3098 2068 1522
08-15 69° 87° 6407 4697 3135 2096 1546
08-16 70° 82° 6461 4741 3169 2123 1567
08-17 70° 80° 6514 4784 3202 2148 1587
08-18 70° 81° 6568 4828 3236 2174 1608
08-19 70° 86° 6624 4874 3272 2202 1631
08-20 66° 83° 6676 4916 3304 2226 1650
08-21 65° 83° 6728 4958 3336 2250 1669
08-22 69° 77° 6779 5000 3367 2273 1687
08-23 59° 70° 6822 5032 3390 2288 1697
08-24 57° 67° 6862 5062 3410 2299 1704
08-25 51° 70° 6900 5090 3428 2310 1709
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 55° 73° 6942 5122 3450 2324 1718
08-27 54° 76° 6985 5155 3473 2339 1728
08-28 57° 79° 7032 5192 3500 2358 1742
08-29 61° 77° 7078 5229 3526 2376 1755
08-30 60° 76° 7124 5264 3552 2394 1768
08-31 53° 77° 7168 5298 3576 2410 1779
09-01 60° 78° 7215 5335 3603 2429 1793
09-02 59° 73° 7259 5369 3627 2444 1804
09-03 51° 66° 7295 5395 3643 2453 1807
09-04 44° 60° 7325 5415 3653 2455 1807
09-05 45° 58° 7355 5435 3663 2457 1807
09-06 45° 58° 7385 5455 3673 2459 1807
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 42° 64° 7416 5476 3684 2462 1807
09-08 48° 78° 7457 5507 3705 2475 1815
09-09 62° 67° 7499 5539 3727 2489 1825
09-10 57° 74° 7543 5573 3751 2505 1836
09-11 58° 77° 7589 5609 3777 2523 1848
09-12 61° 82° 7638 5649 3806 2544 1865
09-13 65° 82° 7690 5690 3838 2568 1884
09-14 68° 87° 7745 5735 3873 2595 1906
09-15 72° 83° 7801 5781 3909 2623 1928
09-16 68° 90° 7858 5828 3946 2652 1953
09-17 64° 80° 7908 5868 3976 2674 1970
09-18 64° 81° 7959 5909 4007 2697 1987
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 65° 72° 8005 5945 4033 2715 2001
09-20 59° 71° 8049 5979 4057 2730 2011
09-21 63° 77° 8097 6017 4085 2750 2026
09-22 61° 74° 8142 6052 4110 2768 2039
09-23 56° 74° 8185 6085 4133 2783 2048
09-24 55° 75° 8228 6118 4156 2798 2058
09-25 54° 82° 8274 6154 4182 2816 2071
09-26 56° 79° 8320 6190 4208 2833 2084
09-27 55° 75° 8362 6222 4230 2848 2094
09-28 47° 79° 8403 6253 4251 2861 2102
09-29 54° 86° 8451 6291 4279 2881 2117
09-30 65° 83° 8503 6333 4311 2905 2136
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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