When to plant in Denmark, WI

Planting dates worked out from Denmark's own frost records, not a generic zone chart.

Safe to plant out

May 16

1 year in 10 has a later frost

Average last frost

May 4

about a 50% chance of a later one

Average first fall frost

Oct 7

1 year in 10 by Sep 21

Frost-free days

151

median, 1991–2020

Station used: Green Bay · 28.1 km away · station 251 m, town 266 m. How we match towns to stations

This season

Plan your garden.

Build my Denmark plan

Planting dates for common crops

Crop	Start indoors	Plant out or sow	Harvest from
Tomato	Mar 21 – Apr 4	May 16 – May 30	Jul 10
Sweet pepper	Mar 7 – Mar 21	May 16 – May 30	Jul 15
Lettuce (leaf)	Mar 8 – Mar 15	Apr 12 – Apr 26	May 22
Peas	—	Apr 12 – May 10	Jun 6
Bush beans	—	May 9 – May 30	Jun 28
Carrot	—	Apr 21 – Jun 2	Jun 20
Beet	—	Apr 21 – Jun 2	Jun 10
Potato	—	Apr 21 – May 12	Jun 30
Kale	Mar 8 – Mar 22	Apr 19 – May 3	Jun 1
Broccoli	Mar 1 – Mar 15	Apr 12 – May 3	Jun 11
Cucumber	Apr 18 – Apr 25	May 16 – May 30	Jul 5
Summer squash and zucchini	Apr 18 – Apr 25	May 16 – May 30	Jun 30
Winter squash	Apr 18 – Apr 25	May 16 – May 30	Aug 4
Sweet corn	—	May 9 – May 30	Jul 8
Onion (from sets)	—	Apr 12 – May 3	Jul 11
Garlic	—	Sep 23 – Oct 21 (fall)	following summer
Spinach	—	Apr 12 – May 10	May 20
Basil	Apr 4 – Apr 18	May 16 – May 30	Jul 12

Plan all 65 crops for Denmark

Denmark's weather over time

How the growing season has shifted here, year by year, from the station's own records.

Each year's last spring frostLong-term trend

See the data as a table

Year	Last spring frost
1887	Apr 26
1888	May 16
1889	May 28
1890	May 11
1891	May 17
1892	Apr 29
1893	May 7
1894	Apr 12
1895	May 21
1896	Apr 22
1897	May 1
1898	Apr 8
1899	Apr 9
1900	May 5
1901	Apr 21
1902	May 10
1903	May 1
1904	May 15
1905	May 1
1906	May 10
1907	May 20
1908	May 2
1909	May 4
1910	May 14
1911	May 3
1912	Apr 30
1913	May 10
1914	Apr 21
1915	May 18
1916	Apr 9
1917	May 23
1918	May 1
1919	Apr 26
1920	May 3
1921	May 15
1922	Apr 21
1923	May 13
1924	Apr 20
1925	May 17
1926	May 4
1927	Apr 30
1928	Apr 27
1929	May 19
1930	May 17
1931	May 3
1932	Apr 27
1933	Apr 27
1934	May 12
1935	May 4
1936	Apr 24
1937	May 14
1938	Apr 22
1939	May 1
1940	May 2
1941	Apr 24
1942	Apr 19
1943	May 13
1944	Apr 18
1945	May 9
1946	May 17
1947	May 28
1948	May 8
1949	May 28
1950	May 16
1951	May 13
1952	Apr 24
1953	May 14
1954	May 20
1955	May 17
1956	May 16
1957	May 16
1958	Jun 6
1959	May 1
1960	May 13
1961	May 27
1962	Apr 20
1963	May 23
1964	Apr 25
1965	May 29
1966	May 10
1967	May 22
1968	May 10
1969	May 26
1970	May 7
1971	May 3
1972	May 8
1973	May 15
1974	May 10
1975	Apr 22
1976	May 12
1977	May 10
1978	May 3
1979	May 5
1980	May 9
1981	May 12
1982	Apr 28
1983	May 17
1984	May 2
1985	Apr 17
1986	May 3
1987	Apr 30
1988	May 25
1989	May 7
1990	May 11
1991	Apr 22
1992	May 6
1993	May 17
1994	Apr 28
1995	Apr 23
1996	May 13
1997	May 16
1998	Apr 29
1999	Apr 25
2000	Apr 30
2001	Apr 18
2002	May 21
2003	May 4
2004	May 5
2005	May 4
2006	May 6
2007	Apr 16
2008	May 4
2009	Apr 23
2010	May 10
2011	May 4
2012	Apr 29
2013	May 13
2014	May 16
2015	Apr 26
2016	May 15
2017	May 8
2018	Apr 29
2019	Apr 28
2020	May 13
2021	May 12
2022	Apr 28
2023	Apr 26
2024	Apr 25

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1887	150
1888	135
1889	131
1890	139
1891	151
1892	176
1893	140
1894	179
1895	139
1896	167
1897	164
1898	199
1899	172
1900	185
1901	165
1902	156
1903	169
1904	143
1905	162
1906	151
1907	140
1908	149
1909	159
1910	165
1911	173
1912	175
1913	160
1914	187
1915	143
1916	183
1917	137
1918	182
1919	167
1920	176
1921	145
1922	178
1923	144
1924	184
1925	144
1926	143
1927	185
1928	151
1929	137
1930	152
1931	185
1932	161
1933	173
1934	168
1935	152
1936	160
1937	150
1938	199
1939	151
1940	187
1941	183
1942	158
1943	166
1944	175
1945	143
1946	148
1947	119
1948	147
1949	122
1950	129
1951	137
1952	160
1953	145
1954	125
1955	117
1956	125
1957	132
1958	116
1959	138
1960	146
1961	123
1962	183
1963	161
1964	155
1965	119
1966	137
1967	129
1968	147
1969	140
1970	160
1971	160
1972	153
1973	127
1974	133
1975	161
1976	131
1977	154
1978	156
1979	160
1980	148
1981	143
1982	170
1983	150
1984	149
1985	167
1986	155
1987	155
1988	133
1989	138
1990	152
1991	151
1992	139
1993	135
1994	181
1995	152
1996	141
1997	151
1998	168
1999	148
2000	147
2001	170
2002	144
2003	147
2004	146
2005	168
2006	157
2007	151
2008	151
2009	159
2010	164
2011	150
2012	142
2013	159
2014	146
2015	172
2016	151
2017	170
2018	165
2019	179
2020	141
2021	163
2022	173
2023	185
2024	173

Each year's average temperature, April to SeptemberLong-term trend

See the data as a table

Year	Growing-season temperature
1887	16.3 °C
1888	14.4 °C
1889	15.3 °C
1890	15.1 °C
1891	16.3 °C
1892	15.2 °C
1893	15.5 °C
1894	16.9 °C
1895	16.8 °C
1896	16.9 °C
1897	16.2 °C
1898	16.1 °C
1899	16.2 °C
1900	16.9 °C
1901	16.5 °C
1902	15.2 °C
1903	15.2 °C
1904	14.7 °C
1905	15.3 °C
1906	16.6 °C
1907	13.9 °C
1908	16.4 °C
1909	15.6 °C
1910	16.2 °C
1911	16.4 °C
1912	15.2 °C
1913	15.8 °C
1914	16.0 °C
1915	15.0 °C
1916	16.0 °C
1917	14.1 °C
1918	15.1 °C
1919	16.6 °C
1920	15.2 °C
1921	18.4 °C
1922	16.7 °C
1923	15.7 °C
1924	13.9 °C
1925	16.1 °C
1926	14.8 °C
1927	14.8 °C
1928	14.7 °C
1929	15.1 °C
1930	16.9 °C
1931	17.4 °C
1932	16.4 °C
1933	17.3 °C
1934	16.4 °C
1935	15.6 °C
1936	16.7 °C
1937	16.9 °C
1938	16.5 °C
1939	16.8 °C
1940	15.5 °C
1941	17.6 °C
1942	16.1 °C
1943	15.9 °C
1944	16.6 °C
1945	15.2 °C
1946	15.6 °C
1947	15.4 °C
1948	16.6 °C
1949	16.7 °C
1950	13.6 °C
1951	14.6 °C
1952	15.9 °C
1953	15.7 °C
1954	15.0 °C
1955	17.2 °C
1956	14.1 °C
1957	15.0 °C
1958	14.6 °C
1959	16.5 °C
1960	15.0 °C
1961	15.4 °C
1962	15.7 °C
1963	16.0 °C
1964	16.0 °C
1965	15.3 °C
1966	14.8 °C
1967	14.7 °C
1968	15.7 °C
1969	14.9 °C
1970	16.4 °C
1971	15.7 °C
1972	15.7 °C
1973	16.3 °C
1974	14.6 °C
1975	15.4 °C
1976	15.8 °C
1977	16.9 °C
1978	15.5 °C
1979	15.2 °C
1980	16.0 °C
1981	15.5 °C
1982	15.0 °C
1983	15.3 °C
1984	15.5 °C
1985	16.0 °C
1986	16.0 °C
1987	17.3 °C
1988	17.3 °C
1989	15.5 °C
1990	15.9 °C
1991	17.1 °C
1992	14.5 °C
1993	15.2 °C
1994	16.4 °C
1995	16.8 °C
1996	14.9 °C
1997	14.2 °C
1998	16.9 °C
1999	16.1 °C
2000	15.1 °C
2001	16.5 °C
2002	16.1 °C
2003	15.1 °C
2004	15.4 °C
2005	17.1 °C
2006	16.7 °C
2007	16.8 °C
2008	16.3 °C
2009	15.2 °C
2010	17.2 °C
2011	15.9 °C
2012	17.5 °C
2013	15.9 °C
2014	15.6 °C
2015	16.9 °C
2016	16.8 °C
2017	16.6 °C
2018	16.5 °C
2019	16.4 °C
2020	16.5 °C
2021	17.4 °C
2022	17.2 °C
2023	17.1 °C
2024	17.8 °C

What this means for you: Since 1887, Denmark's last spring frost has stayed at about the same time of year. Year-to-year swings are large, so keep using the safe date rather than the trend.

Source: daily records from Green Bay (NOAA GHCN-Daily). Years with too many missing days are left out.

Nearby towns

Cooperstown Glenmore Bellevue Mishicot Allouez De Pere