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Relative Flowering Times for Broadleaf Weeds (GDD 50)
forecast for Fri, May. 25. 2018

Forecasted GDD Total: 335 (Base 50) through Fri, May. 25, 2018

Forecast »

5/25

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)

Early Season (WA)

Generously Supported By:

Tabular Data

Daily GDD accumulation for various base temperature models in 2017 & 2018

2018	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
02-19	35°	55°	61	22	3	0	0
02-20	55°	61°	97	48	19	8	3
02-21	32°	50°	115	56	19	8	3
02-22	30°	40°	128	59	19	8	3
02-23	33°	45°	145	66	19	8	3
02-24	34°	41°	161	72	19	8	3
02-25	36°	49°	181	82	19	8	3
02-26	29°	50°	199	90	19	8	3
02-27	37°	60°	226	107	26	8	3
02-28	43°	60°	256	127	36	9	3
03-01	31°	40°	269	130	36	9	3
03-02	26°	42°	282	133	36	9	3
2018	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
03-03	23°	40°	291	133	36	9	3
03-04	26°	41°	303	134	36	9	3
03-05	26°	37°	312	134	36	9	3
03-06	30°	39°	325	137	36	9	3
03-07	24°	33°	331	137	36	9	3
03-08	22°	31°	335	137	36	9	3
03-09	26°	32°	342	137	36	9	3
03-10	19°	34°	347	137	36	9	3
03-11	20°	37°	354	137	36	9	3
03-12	23°	36°	361	137	36	9	3
03-13	25°	33°	368	137	36	9	3
03-14	23°	39°	377	137	36	9	3
2018	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
03-15	25°	36°	386	137	36	9	3
03-16	21°	38°	393	137	36	9	3
03-17	22°	48°	406	140	36	9	3
03-18	25°	56°	425	149	36	9	3
03-19	25°	44°	438	152	36	9	3
03-20	22°	39°	446	152	36	9	3
03-21	25°	37°	455	152	36	9	3
03-22	22°	44°	467	153	36	9	3
03-23	24°	42°	477	154	36	9	3
03-24	23°	40°	487	154	36	9	3
03-25	21°	40°	496	154	36	9	3
03-26	27°	52°	513	161	36	9	3
2018	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
03-27	42°	52°	538	176	41	9	3
03-28	39°	45°	558	186	41	9	3
03-29	41°	47°	580	198	43	9	3
03-30	29°	45°	595	203	43	9	3
03-31	32°	46°	612	210	43	9	3
04-01	27°	37°	623	211	43	9	3
04-02	19°	42°	631	211	43	9	3
04-03	34°	38°	646	215	43	9	3
04-04	26°	33°	653	215	43	9	3
04-05	25°	41°	665	216	43	9	3
04-06	25°	38°	674	216	43	9	3
04-07	19°	34°	678	216	43	9	3
2018	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
04-08	16°	39°	684	216	43	9	3
04-09	30°	38°	696	218	43	9	3
04-10	25°	45°	709	221	43	9	3
04-11	33°	57°	732	234	46	9	3
04-12	43°	70°	766	259	60	16	5
04-13	39°	60°	794	276	68	16	5
04-14	30°	39°	807	279	68	16	5
04-15	30°	34°	817	279	68	16	5
04-16	31°	36°	828	280	68	16	5
04-17	27°	34°	836	280	68	16	5
04-18	30°	42°	851	284	68	16	5
04-19	32°	53°	871	295	69	16	5
2018	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
04-20	30°	58°	893	307	71	16	5
04-21	32°	58°	916	320	74	16	5
04-22	32°	63°	941	335	79	16	5
04-23	38°	72°	974	358	92	21	5
04-24	53°	59°	1008	382	106	27	6
04-25	43°	60°	1038	401	115	28	6
04-26	31°	64°	1063	417	121	28	6
04-27	40°	60°	1091	435	128	28	6
04-28	37°	54°	1114	448	131	28	6
04-29	30°	59°	1136	460	134	28	6
04-30	31°	72°	1166	480	143	30	6
05-01	56°	83°	1213	517	171	50	20
2018	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
05-02	65°	85°	1267	560	204	75	40
05-03	61°	68°	1310	593	227	90	50
05-04	56°	69°	1350	624	247	102	58
05-05	55°	79°	1395	659	272	119	70
05-06	50°	66°	1431	685	288	127	73
05-07	39°	68°	1462	706	300	130	73
05-08	49°	80°	1505	738	322	145	82
05-09	55°	81°	1550	774	347	162	94
05-10	57°	66°	1590	804	367	174	101
05-11	40°	54°	1615	819	372	174	101
05-12	42°	52°	1640	834	377	174	101
05-13	47°	61°	1672	856	389	178	101
2018	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
05-14	51°	75°	1713	887	410	191	109
05-15	60°	72°	1757	921	435	207	120
05-16	52°	79°	1800	954	458	222	131
05-17	52°	76°	1842	986	480	236	140
05-18	47°	76°	1882	1016	499	248	146
05-19	56°	71°	1924	1047	521	262	155
05-20	53°	59°	1958	1071	535	268	156
05-21	48°	64°	1992	1095	549	274	157
05-22	51°	66°	2028	1122	566	282	161
05-23	48°	79°	2070	1154	588	296	169
05-24	55°	83°	2117	1191	614	315	183
05-25	57°	84°	2165	1229	643	335	199
2018	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
05-26	64°	85°	2218	1272	675	360	218
05-27	64°	85°	2270	1314	708	384	238
05-28	63°	85°	2322	1356	740	408	257
05-29	60°	80°	2370	1394	768	428	272
05-30	60°	81°	2419	1433	796	449	287

2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
02-19	37°	62°	102	53	19	4	0
02-20	35°	57°	125	67	23	4	0
02-21	41°	61°	154	86	32	5	0
02-22	43°	60°	184	105	42	6	0
02-23	45°	58°	213	125	51	8	0
02-24	37°	57°	238	140	56	8	0
02-25	23°	42°	249	140	56	8	0
02-26	22°	42°	258	140	56	8	0
02-27	31°	50°	277	149	56	8	0
02-28	39°	55°	302	164	61	8	0
03-01	26°	55°	321	172	61	8	0
03-02	22°	30°	325	172	61	8	0
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
03-03	16°	27°	325	172	61	8	0
03-04	12°	32°	325	172	61	8	0
03-05	23°	47°	338	175	61	8	0
03-06	42°	56°	365	192	68	8	0
03-07	40°	58°	392	209	76	8	0
03-08	39°	47°	413	221	77	8	0
03-09	31°	42°	428	225	77	8	0
03-10	16°	32°	430	225	77	8	0
03-11	14°	21°	430	225	77	8	0
03-12	13°	28°	430	225	77	8	0
03-13	19°	25°	430	225	77	8	0
03-14	13°	22°	430	225	77	8	0
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
03-15	14°	31°	431	225	77	8	0
03-16	14°	40°	436	225	77	8	0
03-17	23°	35°	443	225	77	8	0
03-18	32°	38°	456	228	77	8	0
03-19	33°	43°	472	235	77	8	0
03-20	33°	53°	494	246	78	8	0
03-21	29°	52°	512	255	78	8	0
03-22	19°	35°	518	255	78	8	0
03-23	23°	45°	529	257	78	8	0
03-24	37°	72°	562	279	90	12	0
03-25	38°	44°	580	288	90	12	0
03-26	39°	53°	605	302	95	12	0
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
03-27	48°	55°	634	322	104	14	0
03-28	40°	47°	656	333	106	14	0
03-29	30°	53°	676	343	106	14	0
03-30	36°	41°	692	349	106	14	0
03-31	36°	39°	707	355	106	14	0
04-01	32°	56°	730	367	108	14	0
04-02	32°	59°	753	381	112	14	0
04-03	46°	52°	781	398	119	14	0
04-04	44°	55°	808	415	126	14	0
04-05	37°	45°	827	424	126	14	0
04-06	33°	37°	840	427	126	14	0
04-07	33°	52°	861	438	127	14	0
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
04-08	30°	60°	884	452	131	14	0
04-09	49°	75°	924	481	150	25	7
04-10	59°	72°	968	515	174	41	17
04-11	43°	57°	996	533	182	41	17
04-12	41°	57°	1023	550	189	41	17
04-13	44°	49°	1048	565	194	41	17
04-14	43°	64°	1080	587	206	45	17
04-15	50°	81°	1123	620	229	60	28
04-16	56°	70°	1164	651	250	73	36
04-17	42°	66°	1196	674	263	78	36
04-18	40°	69°	1229	696	275	82	36
04-19	56°	72°	1271	728	297	96	45
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
04-20	48°	66°	1306	753	312	103	47
04-21	44°	53°	1333	770	319	103	47
04-22	37°	59°	1359	786	325	103	47
04-23	36°	68°	1389	806	335	105	47
04-24	40°	71°	1423	830	349	111	48
04-25	51°	73°	1463	860	369	123	55
04-26	58°	82°	1511	898	397	143	70
04-27	48°	67°	1546	924	413	151	73
04-28	45°	64°	1579	946	425	156	73
04-29	45°	56°	1608	965	434	156	73
04-30	40°	51°	1631	978	437	156	73
05-01	44°	66°	1664	1001	450	161	73
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
05-02	41°	49°	1687	1014	453	161	73
05-03	35°	58°	1712	1029	458	161	73
05-04	43°	50°	1736	1043	462	161	73
05-05	42°	55°	1763	1060	469	161	73
05-06	39°	59°	1790	1077	476	161	73
05-07	35°	55°	1813	1090	479	161	73
05-08	30°	58°	1835	1102	481	161	73
05-09	31°	64°	1861	1118	487	161	73
05-10	45°	69°	1896	1143	502	168	75
05-11	46°	65°	1930	1167	516	174	76
05-12	41°	68°	1963	1190	529	179	76
05-13	46°	72°	2000	1217	546	188	80
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
05-14	52°	70°	2038	1246	565	199	85
05-15	42°	74°	2075	1272	581	207	89
05-16	54°	76°	2118	1305	604	222	99
05-17	69°	85°	2172	1350	639	248	120
05-18	57°	85°	2221	1389	668	270	136
05-19	43°	55°	2248	1405	674	270	136
05-20	46°	63°	2280	1428	687	274	136
05-21	54°	72°	2321	1459	708	287	144
05-22	50°	68°	2359	1486	725	296	149
05-23	58°	68°	2400	1517	746	309	157
05-24	56°	65°	2438	1546	765	320	162
05-25	56°	62°	2476	1573	782	329	167
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
05-26	55°	69°	2516	1603	802	341	174
05-27	57°	75°	2559	1636	825	357	184
05-28	58°	78°	2605	1672	851	375	197
05-29	55°	78°	2650	1707	876	391	209
05-30	52°	70°	2688	1735	894	402	214
05-31	51°	72°	2728	1765	914	413	221
06-01	50°	74°	2768	1795	934	425	228
06-02	50°	81°	2812	1829	958	441	239
06-03	49°	83°	2856	1863	982	457	250
06-04	63°	86°	2909	1906	1015	482	270
06-05	57°	70°	2950	1937	1036	495	278
06-06	49°	72°	2989	1966	1055	506	284
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
06-07	49°	75°	3029	1996	1075	518	291
06-08	48°	79°	3071	2028	1097	532	300
06-09	57°	82°	3118	2065	1124	551	314
06-10	58°	86°	3168	2105	1154	573	331
06-11	69°	89°	3225	2152	1191	602	355
06-12	69°	91°	3283	2200	1229	632	380
06-13	73°	87°	3341	2248	1267	662	405
06-14	69°	87°	3397	2294	1303	690	428
06-15	67°	86°	3451	2339	1338	717	449
06-16	64°	82°	3502	2380	1369	740	467
06-17	67°	85°	3556	2424	1403	766	488
06-18	65°	80°	3607	2464	1433	789	506
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
06-19	59°	75°	3652	2499	1458	805	518
06-20	57°	72°	3694	2531	1480	819	527
06-21	50°	76°	3735	2562	1501	832	535
06-22	60°	86°	3786	2603	1532	855	553
06-23	65°	77°	3835	2642	1561	876	569
06-24	60°	74°	3880	2677	1586	893	581
06-25	56°	69°	3920	2708	1607	906	588
06-26	53°	68°	3959	2736	1625	916	594
06-27	49°	71°	3997	2764	1643	926	599
06-28	52°	75°	4039	2796	1665	940	608
06-29	65°	84°	4092	2839	1698	965	628
06-30	67°	79°	4143	2880	1729	988	646
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
07-01	68°	82°	4196	2923	1762	1013	666
07-02	61°	80°	4245	2962	1791	1034	682
07-03	63°	81°	4294	3001	1820	1055	698
07-04	57°	81°	4341	3038	1847	1074	712
07-05	57°	84°	4390	3077	1876	1095	728
07-06	60°	88°	4442	3119	1908	1119	747
07-07	65°	83°	4494	3161	1940	1143	766
07-08	61°	76°	4540	3197	1966	1161	779
07-09	55°	81°	4586	3233	1992	1179	792
07-10	66°	75°	4634	3272	2021	1200	807
07-11	67°	85°	4689	3316	2055	1226	829
07-12	71°	81°	4743	3360	2089	1252	850
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
07-13	71°	80°	4796	3403	2122	1277	870
07-14	66°	77°	4845	3443	2152	1299	886
07-15	58°	79°	4892	3479	2178	1317	900
07-16	64°	77°	4941	3518	2207	1338	916
07-17	58°	79°	4987	3555	2234	1357	929
07-18	60°	85°	5038	3595	2264	1380	947
07-19	66°	88°	5093	3640	2299	1406	969
07-20	72°	84°	5149	3686	2335	1435	992
07-21	65°	85°	5202	3730	2369	1460	1012
07-22	71°	80°	5256	3773	2402	1485	1033
07-23	67°	84°	5309	3816	2435	1510	1053
07-24	61°	74°	5355	3852	2461	1528	1066
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
07-25	52°	78°	5398	3886	2485	1544	1076
07-26	60°	81°	5447	3924	2513	1564	1092
07-27	65°	81°	5498	3965	2544	1587	1110
07-28	59°	78°	5544	4002	2571	1606	1123
07-29	52°	80°	5589	4036	2595	1622	1135
07-30	54°	83°	5635	4072	2621	1640	1148
07-31	55°	85°	5683	4110	2649	1660	1163
08-01	57°	85°	5732	4149	2678	1681	1179
08-02	63°	86°	5785	4192	2711	1706	1199
08-03	62°	82°	5835	4232	2741	1728	1216
08-04	58°	67°	5875	4262	2761	1740	1223
08-05	53°	75°	5917	4294	2783	1754	1232
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
08-06	55°	76°	5960	4328	2807	1770	1242
08-07	58°	75°	6005	4362	2831	1786	1254
08-08	50°	82°	6049	4396	2855	1802	1265
08-09	57°	83°	6097	4434	2883	1822	1280
08-10	57°	83°	6145	4472	2911	1842	1295
08-11	63°	79°	6194	4511	2940	1863	1311
08-12	60°	75°	6240	4547	2966	1881	1324
08-13	54°	78°	6284	4581	2990	1897	1335
08-14	62°	82°	6334	4621	3020	1919	1352
08-15	63°	81°	6384	4661	3050	1941	1369
08-16	63°	85°	6436	4703	3082	1965	1388
08-17	68°	81°	6488	4746	3115	1990	1407
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
08-18	63°	73°	6535	4782	3141	2008	1421
08-19	59°	79°	6582	4819	3168	2027	1435
08-20	55°	84°	6630	4857	3196	2047	1450
08-21	66°	87°	6684	4901	3230	2073	1471
08-22	60°	76°	6730	4938	3257	2092	1484
08-23	56°	73°	6773	4970	3279	2106	1494
08-24	48°	64°	6807	4994	3293	2113	1495
08-25	44°	71°	6843	5020	3309	2120	1498
08-26	46°	74°	6881	5048	3327	2130	1503
08-27	58°	77°	6926	5083	3352	2147	1515
08-28	60°	71°	6969	5117	3376	2163	1525
08-29	56°	75°	7013	5150	3399	2179	1536
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
08-30	55°	80°	7059	5186	3425	2196	1549
08-31	55°	71°	7100	5217	3446	2209	1557
09-01	43°	68°	7133	5240	3459	2214	1557
09-02	43°	77°	7171	5268	3477	2224	1562
09-03	55°	79°	7216	5303	3502	2241	1574
09-04	57°	86°	7265	5343	3532	2263	1590
09-05	53°	69°	7305	5372	3551	2274	1597
09-06	42°	66°	7337	5394	3563	2278	1597
09-07	46°	61°	7368	5415	3574	2281	1597
09-08	50°	67°	7404	5441	3590	2289	1600
09-09	41°	66°	7436	5463	3602	2293	1600
09-10	40°	70°	7468	5486	3615	2298	1600
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
09-11	43°	74°	7505	5512	3631	2306	1603
09-12	44°	78°	7544	5541	3650	2317	1610
09-13	50°	78°	7586	5573	3672	2331	1618
09-14	53°	79°	7630	5607	3696	2347	1630
09-15	53°	81°	7675	5642	3721	2365	1642
09-16	57°	84°	7724	5681	3750	2385	1657
09-17	60°	86°	7775	5722	3781	2408	1676
09-18	59°	78°	7821	5758	3807	2426	1689
09-19	59°	71°	7864	5791	3830	2442	1699
09-20	66°	86°	7919	5836	3865	2468	1720
09-21	68°	93°	7977	5884	3903	2498	1745
09-22	65°	91°	8033	5930	3939	2526	1769
2017	Lo (F)	Hi (F)	GDD 22	GDD 32	GDD 42	GDD 50	GDD 55
09-23	63°	93°	8090	5977	3976	2555	1792
09-24	60°	92°	8144	6021	4010	2581	1813
09-25	63°	89°	8197	6065	4044	2607	1834
09-26	60°	90°	8251	6108	4077	2632	1854
09-27	57°	73°	8294	6141	4100	2647	1864
09-28	48°	69°	8330	6167	4116	2655	1868
09-29	52°	67°	8368	6195	4134	2665	1872
09-30	40°	64°	8398	6215	4144	2667	1872

Latest Updates

March 9^th, 2018Note Regarding 2018 Alerts

We had an issue with the emailed alerts that should be resolved now, and apologize for any inconvenience. You may receive outdated alerts tomorrow (Saturday, March 10, 2018), so please check the details before taking any action. Thank you.

February 17^th, 2018Welcome to a New GDD Season!

GDDTracker is ready for 2018 with GDD tracking that began on February 15. New this year will be the Smith-Kerns Dollar Spot Prediction Model which will be launching soon. Check back soon for additional details!

March 29^th, 2017Timing crabgrass pre-emergence applications

Please note that Dr. Frank has written another helpful article available from the MSU Extension web site.

http://msue.anr.msu.edu/news/timing_crabgrass_pre_emergence_applications

March 9^th, 2017Controlling Annual Bluegrass Seedheads: Spray Now or Wait?

Dr. Kevin Frank has posted a useful article at the MSU Extension website. Please note it is written specifically for Michigan but may apply to other midwest regions.

"Growing degree-days have accumulated quickly, but it may not yet be time to apply plant growth regulators to control annual bluegrass seedheads on golf courses.

February 26^th, 2017Early Spring in Michigan: Boom or Bust?

Dr. Kevin Frank has posted a helpful article on the MSU Extension website. Much of the midwest is experiencing the same (very) early warm-up, so non-Michiganders may find it help as well!

http://msue.anr.msu.edu/news/is_an_early_spring_a_boom_or_bust_for_golf_course_turf

February 16^th, 2017Missing weather data

All air temperature data has been accounted for now.

Zip code		Golf Course or Organization Name (optional)

Welcome!

Relative Flowering Times for Broadleaf Weeds (GDD 50) forecast for Fri, May. 25. 2018

Forecasted GDD Total: 335 (Base 50) through Fri, May. 25, 2018

East Lansing, MI

Tabular Data

Latest Updates

March 9th, 2018Note Regarding 2018 Alerts

February 17th, 2018Welcome to a New GDD Season!

March 29th, 2017Timing crabgrass pre-emergence applications

March 9th, 2017Controlling Annual Bluegrass Seedheads: Spray Now or Wait?

February 26th, 2017Early Spring in Michigan: Boom or Bust?