When to plant in Unity, SK

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

Last spring frost

Early · riskyMay 119 years in 10 still get a later frost
TypicalMay 22about half of years get a later frost
Safe to plant outJun 41 year in 10 gets a later frost

Hardy crops like peas and spinach are timed from the typical date. Wait for the safe date before planting out tomatoes, peppers and squash.

First fall frost

EarlySep 41 year in 10 has frost by then
TypicalSep 14about half of years have had frost
LateSep 279 years in 10 have had frost by then

A typical year has 115 frost-free days. Plan for tender crops to be ripe by the early date.

Station used: Scott Cda · 24.8 km away · station 660 m, town 633 m. How we match towns to stations

This season

Plan your garden.

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Planting dates for common crops

Crop	Start indoors	Plant out or sow	Harvest from
Tomato	Apr 9 – Apr 23	Jun 4 – Jun 18	Jul 29
Sweet pepper	Mar 26 – Apr 9	Jun 4 – Jun 18	Aug 3
Lettuce (leaf)	Mar 23 – Mar 30	Apr 27 – May 11	Jun 6
Peas	—	Apr 27 – May 25	Jun 21
Bush beans	—	May 28 – Jun 18	Jul 17
Carrot	—	May 6 – Jun 17	Jul 5
Beet	—	May 6 – Jun 17	Jun 25
Potato	—	May 6 – May 27	Jul 15
Kale	Mar 23 – Apr 6	May 4 – May 18	Jun 16
Broccoli	Mar 16 – Mar 30	Apr 27 – May 18	Jun 26
Cucumber	May 7 – May 14	Jun 4 – Jun 18	Jul 24
Summer squash and zucchini	May 7 – May 14	Jun 4 – Jun 18	Jul 19
Winter squash	May 7 – May 14	Jun 4 – Jun 18	Aug 23
Sweet corn	—	May 28 – Jun 18	Jul 27
Onion (from sets)	—	Apr 27 – May 18	Jul 26
Garlic	—	Aug 31 – Sep 28 (fall)	following summer
Spinach	—	Apr 27 – May 25	Jun 4
Basil	Apr 23 – May 7	Jun 4 – Jun 18	Jul 31

Plan all 65 crops for Unity

Unity'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
1912	Jun 6
1913	Jun 14
1914	May 31
1915	Jun 28
1916	May 29
1917	Jun 20
1918	Jun 6
1919	Jun 9
1920	Jun 13
1921	Jun 3
1922	Jun 7
1923	May 24
1924	Jun 24
1925	Jun 4
1926	Jun 14
1927	Jun 11
1928	May 11
1929	Jun 4
1930	Jun 4
1931	May 27
1932	May 27
1933	Jun 2
1934	Jun 14
1935	Jun 7
1936	Jun 14
1937	Jun 8
1938	May 29
1939	May 12
1940	May 14
1941	May 23
1942	Jun 23
1943	Jun 6
1944	Jun 17
1945	Jun 16
1946	Jun 17
1947	Jun 10
1948	Jun 15
1949	Jun 17
1950	Jun 8
1951	Jun 30
1952	Jun 25
1953	Jun 19
1954	Jun 2
1955	Jun 9
1956	Jun 14
1957	Jun 11
1958	Jul 6
1959	May 29
1960	May 20
1961	May 17
1962	May 26
1963	May 21
1964	May 16
1965	Jun 8
1966	May 19
1967	Jun 12
1968	May 20
1969	Jun 21
1970	May 29
1971	May 18
1972	Jun 19
1973	May 12
1974	May 30
1975	May 29
1976	May 6
1977	May 1
1978	May 12
1979	May 30
1980	May 31
1981	May 24
1982	May 30
1983	May 19
1984	May 26
1985	Jun 4
1986	May 17
1987	May 21
1988	May 8
1989	May 28
1990	May 20
1991	May 7
1992	Jun 7
1993	May 27
1994	May 6
1995	May 27
1996	May 12
1997	May 23
1998	Jun 3
1999	May 17
2000	May 14
2001	May 21
2002	May 26
2003	May 22
2004	Jun 24
2005	May 14
2006	May 11
2007	May 25
2008	May 28
2009	Jun 9
2010	May 24
2011	Jun 4
2012	May 27
2013	May 2
2014	May 14
2015	May 29
2016	May 14
2017	May 18
2018	May 12
2019	May 20
2020	May 24
2021	May 26
2022	Jun 3
2023	Apr 30
2024	May 19
2025	May 6
2026	May 18

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1912	100
1913	79
1914	85
1915	55
1916	73
1917	76
1918	47
1919	84
1920	67
1921	97
1922	47
1923	108
1924	80
1925	100
1926	54
1927	57
1928	103
1929	91
1930	87
1931	96
1932	114
1933	59
1934	69
1935	69
1936	86
1937	81
1938	85
1939	116
1940	117
1941	107
1942	68
1943	93
1944	65
1945	87
1946	35
1947	90
1948	82
1949	73
1950	69
1951	76
1952	43
1953	78
1954	106
1955	65
1956	64
1957	75
1958	58
1959	101
1960	119
1961	108
1962	99
1963	121
1964	111
1965	87
1966	116
1967	102
1968	130
1969	77
1970	101
1971	123
1972	76
1973	124
1974	93
1975	88
1976	135
1977	112
1978	130
1979	105
1980	107
1981	98
1982	106
1983	116
1984	105
1985	93
1986	111
1987	92
1988	135
1989	104
1990	120
1991	125
1993	108
1994	153
1995	113
1996	120
1997	100
1998	117
1999	114
2000	129
2001	112
2002	67
2003	116
2004	56
2005	130
2006	129
2007	111
2008	118
2009	110
2010	114
2011	100
2012	112
2013	140
2014	119
2015	115
2016	121
2017	121
2018	115
2019	129
2020	105
2021	113
2022	98
2023	111
2024	136
2025	121

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

See the data as a table

Year	Growing-season temperature
1912	11.4 °C
1913	11.7 °C
1914	12.0 °C
1915	12.2 °C
1916	10.7 °C
1917	11.4 °C
1918	11.8 °C
1919	13.6 °C
1920	11.2 °C
1921	11.6 °C
1922	12.5 °C
1924	10.6 °C
1925	11.9 °C
1926	11.0 °C
1927	10.9 °C
1928	10.9 °C
1929	11.0 °C
1930	12.2 °C
1931	12.4 °C
1932	12.7 °C
1933	12.6 °C
1934	11.9 °C
1935	11.1 °C
1936	12.8 °C
1937	13.1 °C
1938	13.0 °C
1939	12.2 °C
1940	12.6 °C
1941	12.7 °C
1942	11.2 °C
1943	11.7 °C
1944	12.5 °C
1945	10.1 °C
1946	11.8 °C
1947	11.7 °C
1948	12.0 °C
1949	13.7 °C
1950	11.4 °C
1951	10.4 °C
1952	12.0 °C
1953	11.6 °C
1954	9.6 °C
1955	11.4 °C
1956	10.8 °C
1957	11.7 °C
1958	12.7 °C
1959	11.5 °C
1960	12.5 °C
1961	12.5 °C
1962	12.3 °C
1963	13.1 °C
1964	12.1 °C
1965	11.0 °C
1966	11.8 °C
1967	11.7 °C
1968	11.7 °C
1969	12.2 °C
1970	12.3 °C
1971	12.1 °C
1972	11.8 °C
1973	12.1 °C
1974	11.0 °C
1975	11.0 °C
1976	13.5 °C
1977	12.4 °C
1978	12.4 °C
1979	11.8 °C
1980	13.2 °C
1981	13.4 °C
1982	11.0 °C
1983	12.0 °C
1984	12.4 °C
1985	11.4 °C
1986	11.6 °C
1987	13.3 °C
1988	13.7 °C
1989	12.8 °C
1990	12.6 °C
1992	11.3 °C
1993	11.2 °C
1994	12.8 °C
1995	11.9 °C
1996	11.7 °C
1997	12.8 °C
1998	14.2 °C
1999	11.5 °C
2000	11.7 °C
2001	13.0 °C
2002	11.4 °C
2003	12.8 °C
2004	10.9 °C
2005	11.4 °C
2006	13.4 °C
2007	12.2 °C
2008	11.7 °C
2009	11.9 °C
2010	11.7 °C
2011	12.3 °C
2012	12.8 °C
2013	12.1 °C
2014	11.7 °C
2015	12.7 °C
2016	13.1 °C
2017	12.7 °C
2018	11.0 °C
2019	11.7 °C
2020	11.3 °C
2021	13.2 °C
2022	12.9 °C
2023	13.5 °C
2024	13.3 °C
2025	13.2 °C
2026	12.5 °C

What this means for you: Since 1912, Unity's last spring frost has come about 2 days earlier per decade, on average. The frost-free season has grown by about 4 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.

Source: daily records from Scott Cda (NOAA GHCN-Daily, from Environment and Climate Change Canada). Years with too many missing days are left out.

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