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MSU Poa Seedhead Flush (GDD 22)
through Sun, Jul. 5. 2026

 
  

Essexville, MI

        

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 22° 41° 10 0 0 0 0
02-16 26° 50° 26 6 0 0 0
02-17 28° 36° 36 6 0 0 0
02-18 32° 38° 49 9 0 0 0
02-19 33° 41° 64 14 0 0 0
02-20 33° 38° 78 18 0 0 0
02-21 31° 34° 88 18 0 0 0
02-22 28° 33° 97 18 0 0 0
02-23 18° 29° 98 18 0 0 0
02-24 15° 32° 100 18 0 0 0
02-25 21° 32° 104 18 0 0 0
02-26 13° 32° 104 18 0 0 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 25° 51° 120 24 0 0 0
02-28 24° 44° 132 26 0 0 0
03-01 16° 23° 132 26 0 0 0
03-02 14° 33° 134 26 0 0 0
03-03 23° 37° 142 26 0 0 0
03-04 24° 49° 156 30 0 0 0
03-05 34° 36° 169 33 0 0 0
03-06 34° 51° 190 44 1 0 0
03-07 37° 60° 216 61 7 0 0
03-08 36° 53° 239 73 10 0 0
03-09 39° 65° 269 93 20 2 0
03-10 32° 39° 282 97 20 2 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 31° 35° 293 98 20 2 0
03-12 28° 37° 304 99 20 2 0
03-13 29° 37° 315 99 20 2 0
03-14 26° 34° 323 99 20 2 0
03-15 29° 38° 334 101 20 2 0
03-16 18° 36° 340 101 20 2 0
03-17 16° 25° 340 101 20 2 0
03-18 18° 31° 342 101 20 2 0
03-19 31° 42° 357 106 20 2 0
03-20 32° 46° 374 113 20 2 0
03-21 29° 39° 386 115 20 2 0
03-22 33° 38° 399 118 20 2 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 28° 35° 409 118 20 2 0
03-24 23° 43° 419 119 20 2 0
03-25 31° 57° 441 131 22 2 0
03-26 36° 52° 463 143 24 2 0
03-27 25° 34° 470 143 24 2 0
03-28 25° 41° 481 143 24 2 0
03-29 37° 55° 505 157 28 2 0
03-30 40° 63° 535 177 37 4 0
03-31 32° 47° 552 185 37 4 0
04-01 30° 37° 564 186 37 4 0
04-02 31° 50° 582 194 37 4 0
04-03 40° 57° 608 210 43 4 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 36° 49° 629 221 44 4 0
04-05 35° 42° 646 228 44 4 0
04-06 27° 43° 659 231 44 4 0
04-07 23° 34° 665 231 44 4 0
04-08 27° 52° 682 238 44 4 0
04-09 43° 64° 714 259 55 7 0
04-10 37° 45° 732 268 55 7 0
04-11 29° 49° 749 275 55 7 0
04-12 41° 63° 779 295 65 9 0
04-13 50° 71° 818 324 84 19 6
04-14 46° 69° 853 349 99 27 8
04-15 50° 64° 888 374 114 33 10
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 51° 61° 922 398 128 39 11
04-17 46° 67° 956 422 142 46 12
04-18 42° 60° 986 441 151 47 12
04-19 34° 45° 1003 449 151 47 12
04-20 27° 44° 1017 453 151 47 12
04-21 39° 64° 1046 472 161 48 12
04-22 41° 58° 1074 490 168 48 12
04-23 40° 64° 1104 510 179 50 12
04-24 47° 69° 1140 536 195 58 15
04-25 40° 48° 1162 548 197 58 15
04-26 40° 55° 1188 564 202 58 15
04-27 42° 66° 1220 585 214 62 15
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 50° 60° 1253 609 227 67 15
04-29 42° 48° 1276 622 230 67 15
04-30 40° 46° 1297 633 231 67 15
05-01 36° 45° 1315 641 231 67 15
05-02 34° 49° 1335 651 231 67 15
05-03 36° 60° 1361 667 238 67 15
05-04 46° 71° 1398 694 254 76 19
05-05 46° 62° 1430 716 266 80 19
05-06 38° 50° 1452 728 268 80 19
05-07 38° 51° 1474 740 271 80 19
05-08 35° 60° 1500 756 276 80 19
05-09 44° 62° 1531 776 287 82 19
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 38° 54° 1555 790 291 82 19
05-11 41° 51° 1578 804 295 82 19
05-12 34° 58° 1602 818 299 82 19
05-13 45° 57° 1631 837 308 83 19
05-14 46° 58° 1661 857 318 85 19
05-15 41° 66° 1693 879 330 89 19
05-16 54° 77° 1736 912 353 104 29
05-17 48° 64° 1770 936 367 110 30
05-18 48° 82° 1814 969 390 126 40
05-19 60° 77° 1860 1006 417 144 54
05-20 48° 60° 1892 1028 429 148 54
05-21 41° 52° 1917 1043 433 148 54
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 43° 58° 1945 1061 442 149 54
05-23 49° 56° 1976 1082 452 151 54
05-24 48° 54° 2005 1101 461 152 54
05-25 52° 77° 2047 1133 484 167 64
05-26 56° 80° 2094 1169 510 185 77
05-27 53° 66° 2131 1197 528 195 82
05-28 50° 59° 2164 1220 540 199 82
05-29 44° 77° 2202 1248 559 210 87
05-30 49° 59° 2235 1271 571 214 87
05-31 42° 72° 2270 1296 586 221 89
06-01 49° 64° 2304 1320 601 228 91
06-02 48° 70° 2341 1347 618 237 94
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 48° 77° 2381 1377 638 249 102
06-04 53° 80° 2426 1412 663 266 114
06-05 60° 77° 2473 1449 689 284 127
06-06 63° 78° 2521 1487 717 304 142
06-07 56° 67° 2560 1516 737 316 149
06-08 52° 77° 2603 1549 759 330 158
06-09 66° 76° 2651 1587 788 351 174
06-10 65° 80° 2702 1628 819 374 192
06-11 66° 80° 2754 1670 850 397 210
06-12 62° 73° 2799 1705 876 415 222
06-13 60° 80° 2847 1743 903 434 237
06-14 53° 69° 2886 1772 922 446 243
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 48° 70° 2923 1799 940 455 248
06-16 56° 74° 2966 1832 963 470 258
06-17 54° 66° 3004 1860 980 480 262
06-18 60° 67° 3045 1891 1002 493 271
06-19 56° 70° 3087 1923 1023 506 279
06-20 57° 68° 3127 1953 1044 519 286
06-21 53° 68° 3165 1981 1062 529 292
06-22 58° 70° 3207 2013 1084 543 301
06-23 54° 68° 3247 2043 1103 554 307
06-24 54° 68° 3286 2072 1122 565 313
06-25 60° 70° 3329 2105 1145 580 323
06-26 60° 67° 3370 2136 1167 594 332
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 54° 70° 3411 2166 1187 606 339
06-28 59° 75° 3456 2202 1212 623 351
06-29 64° 84° 3508 2244 1244 647 370
06-30 72° 88° 3566 2292 1283 678 395
07-01 75° 87° 3625 2341 1322 709 422
07-02 74° 88° 3684 2390 1361 740 448
07-03 72° 86° 3741 2437 1398 769 472
07-04 69° 79° 3794 2479 1430 793 491
07-05 68° 74° 3843 2518 1459 814 507
07-06 66° 76° 3892 2557 1488 835 523
07-07 65° 76° 3940 2596 1516 856 538
07-08 66° 84° 3993 2639 1549 881 558
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 69° 81° 4046 2682 1582 905 578
07-10 66° 75° 4094 2720 1611 926 594
07-11 64° 77° 4143 2759 1639 946 609
07-12 65° 80° 4193 2799 1670 969 627
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 20° 29° 2 0 0 0 0
02-16 20° 29° 5 0 0 0 0
02-17 6° 18° 5 0 0 0 0
02-18 -3° 16° 5 0 0 0 0
02-19 13° 19° 5 0 0 0 0
02-20 14° 25° 5 0 0 0 0
02-21 23° 31° 10 0 0 0 0
02-22 21° 30° 14 0 0 0 0
02-23 26° 34° 22 0 0 0 0
02-24 28° 48° 38 6 0 0 0
02-25 27° 46° 53 11 0 0 0
02-26 21° 41° 61 11 0 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 40° 76 16 0 0 0
02-28 24° 47° 90 19 0 0 0
03-01 15° 28° 90 19 0 0 0
03-02 18° 28° 91 19 0 0 0
03-03 21° 38° 98 19 0 0 0
03-04 32° 43° 114 25 0 0 0
03-05 35° 51° 135 36 1 0 0
03-06 25° 34° 142 36 1 0 0
03-07 26° 39° 153 37 1 0 0
03-08 20° 36° 159 37 1 0 0
03-09 27° 50° 175 43 1 0 0
03-10 29° 58° 197 55 3 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 30° 48° 214 62 3 0 0
03-12 27° 39° 225 63 3 0 0
03-13 26° 50° 241 69 3 0 0
03-14 34° 67° 269 88 12 1 0
03-15 55° 69° 309 118 32 13 7
03-16 30° 59° 332 130 34 13 7
03-17 26° 44° 345 133 34 13 7
03-18 39° 57° 371 149 40 13 7
03-19 40° 51° 395 163 44 13 7
03-20 31° 45° 410 168 44 13 7
03-21 27° 54° 429 177 44 13 7
03-22 25° 49° 443 182 44 13 7
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 21° 43° 454 182 44 13 7
03-24 34° 39° 468 186 44 13 7
03-25 31° 38° 480 188 44 13 7
03-26 28° 43° 494 192 44 13 7
03-27 26° 55° 512 200 44 13 7
03-28 37° 46° 532 210 44 13 7
03-29 32° 38° 544 213 44 13 7
03-30 36° 43° 562 220 44 13 7
03-31 30° 45° 577 225 44 13 7
04-01 25° 36° 586 225 44 13 7
04-02 32° 46° 603 232 44 13 7
04-03 40° 57° 629 249 51 13 7
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 33° 44° 646 256 51 13 7
04-05 36° 51° 668 267 52 13 7
04-06 31° 45° 684 274 52 13 7
04-07 27° 39° 695 274 52 13 7
04-08 25° 36° 704 274 52 13 7
04-09 24° 44° 716 277 52 13 7
04-10 34° 40° 731 281 52 13 7
04-11 29° 46° 746 287 52 13 7
04-12 28° 51° 764 295 52 13 7
04-13 42° 58° 792 313 60 13 7
04-14 44° 64° 824 335 72 17 7
04-15 38° 48° 845 346 73 17 7
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 35° 50° 865 356 74 17 7
04-17 29° 59° 888 368 76 17 7
04-18 50° 67° 924 395 92 25 10
04-19 42° 63° 954 415 103 27 10
04-20 35° 47° 974 424 103 27 10
04-21 43° 64° 1005 446 114 31 10
04-22 40° 61° 1034 465 123 32 10
04-23 43° 55° 1060 481 130 32 10
04-24 44° 69° 1095 506 144 38 12
04-25 45° 58° 1124 525 153 39 12
04-26 42° 51° 1149 540 158 39 12
04-27 35° 59° 1174 555 163 39 12
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 47° 71° 1211 582 180 48 16
04-29 43° 76° 1248 609 197 58 20
04-30 34° 50° 1268 619 198 58 20
05-01 42° 61° 1298 639 207 59 20
05-02 45° 53° 1325 655 214 59 20
05-03 42° 47° 1347 668 216 59 20
05-04 38° 52° 1370 681 219 59 20
05-05 46° 52° 1397 698 227 59 20
05-06 48° 56° 1427 718 236 61 20
05-07 45° 58° 1457 738 246 63 20
05-08 39° 45° 1477 748 246 63 20
05-09 35° 63° 1504 764 253 63 20
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 47° 64° 1537 788 266 68 20
05-11 42° 57° 1564 805 274 68 20
05-12 44° 70° 1600 830 289 75 22
05-13 57° 66° 1639 860 308 86 29
05-14 58° 67° 1680 890 329 99 36
05-15 53° 74° 1721 922 350 112 45
05-16 58° 77° 1766 957 376 130 57
05-17 53° 66° 1804 985 393 139 62
05-18 47° 54° 1832 1003 402 140 62
05-19 43° 49° 1857 1017 406 140 62
05-20 40° 51° 1880 1031 409 140 62
05-21 47° 48° 1905 1046 415 140 62
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 48° 52° 1933 1064 423 140 62
05-23 42° 54° 1959 1080 428 140 62
05-24 44° 58° 1988 1099 437 141 62
05-25 42° 62° 2018 1119 447 143 62
05-26 44° 62° 2049 1140 458 146 62
05-27 45° 64° 2081 1162 471 150 62
05-28 50° 61° 2115 1186 484 156 62
05-29 53° 67° 2153 1214 502 166 67
05-30 53° 71° 2193 1244 522 178 74
05-31 48° 62° 2226 1267 536 183 75
06-01 42° 66° 2258 1289 548 187 75
06-02 43° 76° 2296 1316 565 197 79
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 57° 82° 2343 1354 592 216 93
06-04 55° 76° 2387 1387 616 232 104
06-05 54° 66° 2425 1416 634 242 109
06-06 50° 67° 2461 1442 651 250 113
06-07 52° 67° 2499 1470 668 260 117
06-08 55° 71° 2539 1500 689 272 125
06-09 57° 73° 2582 1533 712 287 135
06-10 54° 65° 2620 1561 729 297 139
06-11 53° 81° 2665 1596 754 314 151
06-12 58° 66° 2705 1626 774 326 158
06-13 56° 61° 2741 1652 790 334 161
06-14 56° 63° 2779 1679 808 344 166
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 57° 66° 2818 1709 828 355 173
06-16 55° 75° 2861 1742 851 370 183
06-17 64° 84° 2913 1784 883 394 202
06-18 60° 68° 2955 1816 905 408 211
06-19 56° 72° 2998 1848 927 423 220
06-20 57° 72° 3040 1881 949 437 229
06-21 66° 87° 3094 1925 984 463 251
06-22 76° 89° 3155 1976 1025 496 278
06-23 75° 90° 3216 2027 1065 529 306
06-24 67° 85° 3270 2071 1099 555 327
06-25 63° 70° 3315 2105 1124 572 339
06-26 62° 66° 3357 2138 1146 586 348
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 64° 85° 3409 2180 1179 610 367
06-28 65° 77° 3459 2219 1208 632 384
06-29 60° 82° 3507 2258 1237 652 400
06-30 70° 79° 3560 2301 1269 677 419
07-01 67° 78° 3610 2341 1300 699 437
07-02 63° 82° 3661 2382 1330 722 454
07-03 64° 74° 3708 2419 1357 741 468
07-04 57° 80° 3754 2455 1384 759 482
07-05 69° 87° 3811 2501 1420 788 505
07-06 66° 83° 3863 2544 1452 812 524
07-07 62° 69° 3906 2577 1475 827 534
07-08 58° 76° 3951 2612 1500 844 546
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 66° 78° 4001 2652 1531 866 563
07-10 64° 75° 4049 2690 1558 886 578
07-11 65° 75° 4097 2727 1586 906 593
07-12 68° 82° 4150 2770 1619 931 613
07-13 67° 80° 4201 2812 1650 954 631
07-14 60° 82° 4250 2851 1679 975 647
07-15 64° 83° 4301 2892 1711 998 666
07-16 67° 83° 4354 2935 1744 1023 686
07-17 60° 73° 4399 2970 1768 1040 697
07-18 52° 74° 4440 3001 1789 1053 705
07-19 62° 77° 4487 3038 1817 1072 720
07-20 66° 76° 4536 3077 1846 1093 735
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 60° 71° 4580 3111 1869 1109 746
07-22 53° 77° 4623 3144 1892 1124 756
07-23 62° 85° 4674 3185 1924 1147 775
07-24 73° 89° 4734 3234 1963 1179 801
07-25 70° 77° 4785 3276 1994 1202 819
07-26 66° 78° 4835 3316 2025 1224 837
07-27 70° 86° 4891 3362 2061 1252 859
07-28 70° 86° 4947 3408 2096 1280 882
07-29 68° 82° 5000 3451 2130 1305 902
07-30 65° 75° 5048 3489 2157 1325 917
07-31 64° 73° 5095 3525 2184 1344 931
08-01 57° 74° 5138 3559 2208 1359 942
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 54° 77° 5181 3592 2231 1374 952
08-03 57° 78° 5227 3628 2257 1392 964
08-04 58° 77° 5273 3664 2282 1410 977
08-05 64° 75° 5321 3701 2310 1430 992
08-06 65° 81° 5372 3743 2341 1453 1010
08-07 64° 83° 5423 3784 2373 1476 1029
08-08 69° 85° 5479 3830 2408 1504 1051
08-09 74° 87° 5537 3878 2446 1534 1076
08-10 73° 89° 5596 3927 2485 1565 1102
08-11 73° 86° 5653 3974 2522 1594 1126
08-12 68° 80° 5705 4016 2555 1618 1145
08-13 68° 80° 5757 4058 2587 1642 1164
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 66° 78° 5807 4098 2617 1664 1181
08-15 66° 84° 5860 4141 2649 1689 1201
08-16 69° 85° 5915 4186 2684 1716 1223
08-17 63° 75° 5962 4223 2711 1735 1237
08-18 59° 75° 6007 4258 2737 1752 1249
08-19 62° 71° 6052 4293 2761 1769 1261
08-20 64° 71° 6097 4328 2787 1786 1274
08-21 64° 74° 6144 4365 2814 1805 1288
08-22 56° 79° 6190 4401 2839 1823 1300
08-23 65° 78° 6240 4441 2869 1845 1317
08-24 56° 72° 6282 4473 2891 1859 1326
08-25 55° 68° 6321 4502 2911 1870 1333
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 49° 69° 6358 4529 2927 1879 1336
08-27 46° 75° 6397 4557 2946 1890 1342
08-28 58° 70° 6439 4590 2968 1904 1351
08-29 50° 65° 6474 4615 2984 1911 1353
08-30 47° 70° 6511 4642 3000 1920 1357
08-31 49° 72° 6549 4670 3018 1930 1362
09-01 51° 73° 6589 4700 3038 1942 1369
09-02 51° 75° 6630 4731 3060 1955 1378
09-03 56° 74° 6673 4764 3083 1970 1388
09-04 49° 64° 6708 4788 3097 1977 1389
09-05 51° 65° 6744 4815 3113 1985 1392
09-06 50° 62° 6777 4838 3127 1990 1393
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 45° 65° 6810 4861 3140 1995 1393
09-08 41° 66° 6842 4883 3151 1999 1393
09-09 47° 72° 6880 4910 3169 2009 1397
09-10 50° 73° 6919 4940 3189 2020 1404
09-11 53° 70° 6959 4970 3208 2032 1411
09-12 52° 74° 7000 5001 3229 2045 1419
09-13 58° 75° 7045 5036 3254 2062 1431
09-14 53° 74° 7086 5067 3275 2075 1439
09-15 57° 72° 7128 5099 3298 2089 1448
09-16 54° 73° 7170 5131 3319 2103 1457
09-17 49° 76° 7211 5162 3340 2116 1464
09-18 58° 81° 7258 5199 3367 2135 1479
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 59° 69° 7300 5231 3389 2149 1488
09-20 57° 72° 7343 5264 3412 2164 1497
09-21 58° 69° 7384 5295 3433 2177 1506
09-22 62° 73° 7430 5331 3459 2195 1518
09-23 60° 73° 7474 5365 3484 2211 1530
09-24 63° 67° 7517 5398 3506 2226 1540
09-25 59° 71° 7560 5431 3530 2241 1550
09-26 52° 75° 7602 5463 3551 2255 1559
09-27 59° 78° 7649 5500 3578 2274 1572
09-28 55° 70° 7689 5530 3599 2286 1580
09-29 48° 74° 7728 5559 3618 2297 1586
09-30 53° 68° 7767 5588 3636 2308 1592
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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