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Relative Flowering Times for Broadleaf Weeds (GDD 50)
forecast for Mon, Apr. 6. 2026

 

Forecasted GDD Total: 199 (Base 50) through Mon, Apr. 6, 2026

  

Gahanna, OH

        

Forecast »

“Flashback” to 2025

3/28

3/29

3/30

3/31

4/1

4/2

4/3

4/4

4/5

4/6

4/7

4/8

4/9

Late Season (Biennials and Perennials)

1401

Mid Season and Late Season (SA and Perennials)

601

Mid Season (Perennials)

201

Early and Mid Season (WA and Perennials)

21

Early Season (WA)

5

 

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 34° 46° 18 8 0 0 0
02-16 32° 43° 34 14 0 0 0
02-17 31° 56° 55 25 2 0 0
02-18 48° 64° 90 50 16 6 1
02-19 49° 61° 122 72 29 11 1
02-20 34° 54° 144 84 31 11 1
02-21 30° 38° 156 86 31 11 1
02-22 25° 30° 162 86 31 11 1
02-23 21° 27° 164 86 31 11 1
02-24 20° 33° 168 86 31 11 1
02-25 32° 49° 187 95 31 11 1
02-26 26° 45° 201 99 31 11 1
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 31° 56° 222 110 32 11 1
02-28 39° 57° 248 126 38 11 1
03-01 25° 37° 257 126 38 11 1
03-02 20° 33° 262 126 38 11 1
03-03 32° 49° 280 135 38 11 1
03-04 44° 54° 307 152 45 11 1
03-05 54° 62° 343 177 61 19 4
03-06 52° 73° 384 208 82 31 11
03-07 59° 71° 426 240 104 46 21
03-08 42° 58° 455 259 112 46 21
03-09 40° 68° 486 281 124 50 21
03-10 57° 72° 529 313 147 65 31
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 37° 68° 559 333 157 67 31
03-12 30° 43° 574 338 157 67 31
03-13 33° 58° 597 352 161 67 31
03-14 31° 44° 613 357 161 67 31
03-15 39° 75° 648 382 175 74 32
03-16 26° 64° 671 395 178 74 32
03-17 20° 26° 672 395 178 74 32
03-18 19° 37° 678 395 178 74 32
03-19 36° 63° 705 413 186 74 32
03-20 47° 66° 739 437 200 80 34
03-21 39° 61° 767 454 208 80 34
03-22 44° 83° 808 486 229 93 42
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 32° 42° 823 491 229 93 42
03-24 26° 47° 838 495 229 93 42
03-25 37° 62° 866 513 237 93 42
03-26 56° 76° 910 547 261 110 53
03-27 33° 53° 931 558 262 110 53
03-28 29° 43° 945 562 262 110 53
03-29 32° 62° 970 577 267 110 53
03-30 55° 71° 1011 608 288 123 61
03-31 61° 77° 1058 645 315 141 75
04-01 43° 66° 1090 668 327 146 75
04-02 43° 80° 1130 697 347 157 81
04-03 66° 76° 1178 736 376 178 97
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 62° 79° 1227 775 405 199 113
04-05 42° 50° 1251 789 409 199 113
04-06 35° 54° 1274 802 411 199 113
04-07 29° 46° 1290 807 411 199 113
04-08 28° 63° 1313 821 415 199 113
04-09 46° 71° 1350 847 431 207 117
04-10 50° 73° 1389 877 451 219 123
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 28° 39° 12 2 0 0 0
02-16 25° 39° 22 2 0 0 0
02-17 11° 24° 22 2 0 0 0
02-18 5° 16° 22 2 0 0 0
02-19 10° 19° 22 2 0 0 0
02-20 14° 19° 22 2 0 0 0
02-21 19° 27° 23 2 0 0 0
02-22 12° 31° 23 2 0 0 0
02-23 20° 39° 30 2 0 0 0
02-24 32° 49° 48 10 0 0 0
02-25 36° 56° 72 24 4 0 0
02-26 28° 51° 90 31 4 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 35° 48° 109 41 4 0 0
02-28 30° 55° 130 51 5 0 0
03-01 24° 50° 145 56 5 0 0
03-02 17° 32° 147 56 5 0 0
03-03 19° 39° 154 56 5 0 0
03-04 36° 65° 182 75 13 1 0
03-05 33° 59° 206 89 17 1 0
03-06 29° 35° 216 89 17 1 0
03-07 27° 41° 228 91 17 1 0
03-08 29° 40° 241 93 17 1 0
03-09 28° 55° 260 103 17 1 0
03-10 32° 63° 286 119 23 1 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 41° 71° 320 143 37 7 1
03-12 36° 68° 350 163 47 8 1
03-13 36° 72° 382 185 59 12 1
03-14 45° 77° 421 214 78 23 7
03-15 56° 70° 462 245 99 36 15
03-16 38° 59° 488 261 105 36 15
03-17 30° 45° 504 267 105 36 15
03-18 34° 69° 533 286 115 38 15
03-19 53° 70° 573 316 134 49 22
03-20 36° 64° 601 334 143 50 22
03-21 26° 51° 618 340 143 50 22
03-22 35° 48° 637 350 143 50 22
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 28° 45° 652 355 143 50 22
03-24 36° 52° 674 367 145 50 22
03-25 34° 50° 695 378 145 50 22
03-26 28° 49° 711 384 145 50 22
03-27 31° 60° 735 397 149 50 22
03-28 47° 72° 772 425 167 59 27
03-29 64° 76° 821 463 195 80 42
03-30 56° 69° 861 494 216 92 50
03-31 40° 55° 887 510 221 92 50
04-01 38° 50° 909 522 223 92 50
04-02 40° 76° 945 548 239 101 53
04-03 50° 74° 985 578 259 113 60
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 49° 54° 1015 598 269 114 60
04-05 48° 65° 1049 622 283 121 61
04-06 36° 48° 1069 632 284 121 61
04-07 30° 53° 1089 642 284 121 61
04-08 25° 39° 1099 642 284 121 61
04-09 26° 46° 1113 646 284 121 61
04-10 40° 56° 1138 661 289 121 61
04-11 34° 41° 1154 667 289 121 61
04-12 28° 51° 1171 674 289 121 61
04-13 31° 59° 1194 687 292 121 61
04-14 52° 72° 1234 717 312 133 68
04-15 41° 56° 1261 734 318 133 68
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 35° 52° 1282 745 320 133 68
04-17 31° 62° 1307 760 325 133 68
04-18 54° 80° 1352 795 350 150 81
04-19 60° 77° 1399 831 376 168 94
04-20 51° 70° 1437 860 395 178 99
04-21 56° 73° 1479 892 417 193 109
04-22 48° 68° 1515 918 433 201 112
04-23 47° 78° 1555 948 453 213 119
04-24 52° 82° 1600 983 478 230 131
04-25 61° 73° 1645 1018 503 247 143
04-26 45° 64° 1678 1041 516 252 143
04-27 36° 65° 1707 1060 525 253 143
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 44° 77° 1746 1088 543 263 149
04-29 62° 78° 1793 1126 571 283 163
04-30 49° 71° 1831 1154 589 293 168
05-01 59° 77° 1878 1190 615 311 182
05-02 59° 72° 1921 1224 639 327 192
05-03 49° 60° 1954 1247 652 332 192
05-04 48° 62° 1987 1270 665 337 192
05-05 48° 64° 2021 1294 678 342 193
05-06 51° 57° 2052 1315 690 346 193
05-07 51° 69° 2091 1343 708 356 198
05-08 48° 69° 2127 1370 725 365 202
05-09 41° 60° 2155 1388 733 365 202
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 39° 72° 2189 1412 747 371 202
05-11 50° 77° 2230 1443 768 384 211
05-12 56° 73° 2273 1476 791 399 221
05-13 62° 71° 2318 1511 816 416 232
05-14 60° 72° 2362 1545 840 432 243
05-15 61° 82° 2411 1584 869 453 259
05-16 62° 77° 2459 1622 897 472 274
05-17 61° 70° 2502 1655 920 488 284
05-18 58° 69° 2543 1686 941 501 293
05-19 50° 68° 2581 1713 958 510 297
05-20 48° 59° 2612 1735 970 514 297
05-21 54° 65° 2650 1762 987 523 301
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 49° 55° 2680 1783 998 526 301
05-23 43° 59° 2709 1802 1007 527 301
05-24 42° 64° 2740 1823 1018 530 301
05-25 43° 65° 2772 1845 1030 534 301
05-26 45° 68° 2806 1869 1044 540 303
05-27 54° 62° 2842 1895 1060 548 306
05-28 53° 61° 2877 1920 1075 555 308
05-29 52° 72° 2918 1951 1096 568 315
05-30 55° 62° 2955 1978 1113 576 319
05-31 50° 65° 2990 2003 1128 584 322
06-01 43° 66° 3023 2026 1141 589 322
06-02 43° 76° 3061 2054 1159 599 326
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 53° 83° 3107 2090 1185 617 339
06-04 65° 85° 3160 2133 1218 642 360
06-05 65° 81° 3211 2174 1249 665 378
06-06 67° 79° 3262 2215 1280 688 396
06-07 64° 78° 3311 2254 1309 709 412
06-08 62° 76° 3359 2291 1336 728 426
06-09 64° 70° 3404 2327 1361 745 438
06-10 57° 74° 3447 2360 1385 760 448
06-11 55° 81° 3493 2396 1411 779 462
06-12 60° 85° 3543 2436 1441 801 479
06-13 68° 83° 3597 2480 1475 827 500
06-14 69° 80° 3649 2522 1507 851 519
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 67° 80° 3701 2564 1539 875 538
06-16 65° 82° 3753 2606 1571 899 556
06-17 68° 79° 3805 2648 1602 922 575
06-18 67° 85° 3859 2692 1636 948 596
06-19 64° 73° 3905 2728 1663 967 610
06-20 61° 82° 3955 2768 1693 989 627
06-21 67° 87° 4010 2813 1728 1016 649
06-22 72° 92° 4070 2863 1768 1048 676
06-23 72° 93° 4131 2914 1809 1081 703
06-24 73° 94° 4192 2965 1850 1114 732
06-25 74° 90° 4252 3015 1890 1146 759
06-26 71° 88° 4309 3062 1927 1175 783
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 72° 89° 4368 3111 1966 1206 808
06-28 71° 87° 4425 3158 2003 1235 832
06-29 69° 83° 4479 3202 2037 1261 854
06-30 72° 81° 4534 3246 2071 1287 875
07-01 70° 77° 4585 3288 2103 1311 894
07-02 64° 83° 4637 3330 2135 1335 913
07-03 66° 86° 4691 3374 2169 1361 934
07-04 67° 89° 4748 3421 2206 1389 957
07-05 68° 89° 4804 3467 2242 1418 981
07-06 69° 89° 4861 3514 2279 1447 1005
07-07 73° 86° 4919 3562 2317 1476 1029
07-08 71° 84° 4974 3607 2352 1504 1052
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 70° 82° 5028 3651 2386 1530 1073
07-10 70° 82° 5083 3696 2420 1556 1094
07-11 69° 88° 5139 3742 2457 1585 1118
07-12 72° 87° 5197 3790 2495 1614 1142
07-13 69° 84° 5251 3834 2529 1641 1164
07-14 71° 83° 5306 3879 2564 1668 1186
07-15 66° 86° 5361 3923 2598 1694 1207
07-16 74° 83° 5417 3970 2635 1723 1230
07-17 72° 84° 5473 4016 2671 1751 1254
07-18 70° 75° 5523 4056 2701 1773 1271
07-19 64° 82° 5575 4098 2733 1797 1289
07-20 71° 82° 5629 4142 2767 1823 1311
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 64° 79° 5679 4181 2796 1844 1327
07-22 59° 82° 5727 4220 2825 1865 1343
07-23 59° 86° 5777 4260 2855 1887 1360
07-24 65° 90° 5833 4306 2891 1915 1383
07-25 73° 86° 5891 4353 2928 1944 1407
07-26 70° 89° 5948 4401 2966 1974 1432
07-27 71° 83° 6003 4446 3001 2001 1454
07-28 72° 86° 6060 4493 3038 2030 1478
07-29 71° 86° 6117 4540 3075 2059 1502
07-30 69° 89° 6174 4587 3112 2088 1525
07-31 65° 76° 6222 4625 3140 2108 1541
08-01 57° 75° 6266 4659 3164 2124 1552
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 57° 75° 6310 4693 3188 2140 1563
08-03 55° 78° 6355 4728 3213 2156 1574
08-04 58° 79° 6401 4764 3239 2175 1588
08-05 61° 83° 6451 4804 3269 2197 1605
08-06 66° 83° 6504 4847 3301 2221 1624
08-07 64° 83° 6555 4888 3333 2245 1643
08-08 65° 84° 6607 4930 3365 2269 1662
08-09 64° 86° 6660 4973 3398 2294 1682
08-10 65° 88° 6714 5017 3432 2320 1703
08-11 66° 88° 6770 5063 3468 2347 1725
08-12 68° 89° 6826 5109 3504 2376 1749
08-13 70° 83° 6881 5154 3539 2403 1771
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 65° 85° 6934 5197 3572 2428 1791
08-15 65° 87° 6988 5241 3606 2454 1812
08-16 68° 89° 7045 5288 3643 2483 1836
08-17 71° 85° 7102 5334 3679 2511 1859
08-18 63° 83° 7153 5376 3711 2535 1878
08-19 64° 88° 7207 5420 3745 2561 1899
08-20 69° 75° 7257 5460 3775 2583 1916
08-21 65° 73° 7304 5497 3802 2602 1930
08-22 60° 81° 7353 5536 3831 2622 1945
08-23 63° 81° 7403 5576 3861 2645 1962
08-24 62° 78° 7451 5614 3889 2664 1977
08-25 53° 71° 7491 5644 3909 2677 1985
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 49° 71° 7529 5672 3927 2687 1989
08-27 47° 72° 7566 5699 3944 2696 1994
08-28 49° 69° 7603 5726 3961 2705 1998
08-29 53° 72° 7644 5757 3981 2717 2005
08-30 46° 72° 7681 5784 3999 2727 2009
08-31 50° 77° 7722 5815 4020 2740 2018
09-01 53° 78° 7765 5848 4043 2755 2028
09-02 49° 80° 7808 5881 4066 2770 2038
09-03 51° 81° 7852 5915 4090 2786 2049
09-04 55° 72° 7894 5947 4111 2799 2057
09-05 49° 79° 7935 5978 4133 2813 2066
09-06 53° 69° 7975 6008 4153 2825 2072
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 44° 69° 8009 6032 4167 2831 2074
09-08 43° 72° 8045 6058 4183 2839 2076
09-09 45° 76° 8083 6086 4201 2849 2082
09-10 46° 79° 8124 6117 4222 2862 2090
09-11 52° 81° 8169 6152 4247 2878 2101
09-12 51° 83° 8213 6186 4271 2895 2113
09-13 52° 83° 8259 6221 4296 2912 2125
09-14 56° 84° 8307 6260 4324 2932 2140
09-15 59° 86° 8357 6300 4355 2955 2158
09-16 60° 83° 8407 6340 4385 2977 2175
09-17 56° 85° 8456 6379 4414 2997 2190
09-18 55° 86° 8504 6417 4442 3018 2206
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 55° 87° 8553 6456 4471 3039 2222
09-20 61° 87° 8605 6498 4503 3063 2241
09-21 67° 85° 8659 6542 4537 3089 2262
09-22 65° 76° 8708 6581 4566 3110 2278
09-23 65° 77° 8757 6620 4595 3131 2294
09-24 66° 73° 8805 6658 4623 3151 2308
09-25 63° 73° 8851 6694 4649 3169 2322
09-26 56° 78° 8897 6729 4674 3186 2334
09-27 56° 82° 8943 6766 4701 3205 2348
09-28 57° 86° 8993 6806 4731 3227 2364
09-29 59° 85° 9043 6846 4761 3248 2381
09-30 56° 84° 9091 6884 4789 3268 2396
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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