Table 1. Site information including geographic characteristics, winter (December, January, and February) and spring (March, April, and May) mean temperature, mean bloom dates (MBD), and standard deviation of bloom dates (SD) over the past 12 years (2006~2017). MUP: Mt. Ujang Park, GE: Gangbyeon Expressway, SNC: Seoul National Cemetery, SCGP: Seoul Children’s Grand Park.

Site	Longitude [°E]	Latitude [°N]	Elevation [m]	Winter mean temperature [°C]	Spring mean temperature [°C]	MBD ± SD [DOY]
Mokpo	126.4214	34.83606	18	2.93	12.40	135 ± 2.57
Ttangkkeut	126.5272	34.30667	124	2.70	12.23	136 ± 4.03
Haenam	126.6495	34.5726	34	2.19	11.98	135 ± 3.17
Wando	126.6666	34.39216	31	2.91	12.33	133 ± 4.37
Namhae	127.8893	34.87935	13	3.39	13.44	133 ± 4.37
Jinju	128.1044	35.1674	27	1.54	12.66	132 ± 4.50
Miryang	128.7572	35.5071	47	1.48	12.89	131 ± 4.79
Cheongdo	128.7891	35.68262	287	0.25	11.86	134 ± 3.55
Chuncheon	127.8002	37.90248	187	-3.85	10.15	139 ± 4.87
Hongcheon	127.8787	37.66586	156	-3.33	10.95	141 ± 5.20
Chungju	127.9241	36.94133	142	-3.24	10.23	136 ± 3.41
Hoengseong	127.9742	37.4713	118	-4.88	8.81	141 ± 7.79
Wonju	127.9742	37.38141	148	-3.15	10.47	139 ± 4.17
Yanggu	127.9778	38.05732	247	-4.75	8.81	150 ± 8.74
Jecheon	128.0849	36.88145	241	-3.46	9.79	139 ± 5.34
MUP	126.8434	37.55386	25	-1.98	10.84	137 ± 5.53
Seooreung	126.8986	37.62968	51	-1.60	11.29	141 ± 5.85
GE	126.9349	37.54162	5	-1.82	11.15	135 ± 5.18
Mt. Gwanak	126.9476	37.46609	58	-3.96	8.77	139 ± 5.01
SNC	126.9745	37.50365	31	-2.61	10.28	136 ± 5.13
Mt. Bukak	126.9806	37.60198	268	-2.27	10.56	143 ± 6.97
Mt. Nam	126.9812	37.55262	118	-1.87	11.21	137 ± 4.42
Jeongneung	127.0078	37.60397	91	-2.23	10.61	137 ± 5.05
Hongneung	127.0462	37.59579	68	-1.70	11.21	137 ± 5.48
Taereung	127.0746	37.61732	21	-1.84	11.09	133 ± 5.26
SCGP	127.0809	37.5499	31	-1.88	11.07	133 ± 4.89