When to plant in Garrison, ND
Planting dates worked out from Garrison's own frost records, not a generic zone chart.
Safe to plant out
May 25
1 year in 10 has a later frost
Average last frost
May 16
about a 50% chance of a later one
Average first fall frost
Sep 22
1 year in 10 by Sep 14
Frost-free days
132
median, 1991–2020
Station used: Garrison · 0.4 km away · station 589 m, town 588 m. How we match towns to stations
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Mar 30 – Apr 13 | May 25 – Jun 8 | Jul 19 |
| Sweet pepper | Mar 16 – Mar 30 | May 25 – Jun 8 | Jul 24 |
| Lettuce (leaf) | Mar 17 – Mar 24 | Apr 21 – May 5 | May 31 |
| Peas | — | Apr 21 – May 19 | Jun 15 |
| Bush beans | — | May 18 – Jun 8 | Jul 7 |
| Carrot | — | Apr 30 – Jun 11 | Jun 29 |
| Beet | — | Apr 30 – Jun 11 | Jun 19 |
| Potato | — | Apr 30 – May 21 | Jul 9 |
| Kale | Mar 17 – Mar 31 | Apr 28 – May 12 | Jun 10 |
| Broccoli | Mar 10 – Mar 24 | Apr 21 – May 12 | Jun 20 |
| Cucumber | Apr 27 – May 4 | May 25 – Jun 8 | Jul 14 |
| Summer squash and zucchini | Apr 27 – May 4 | May 25 – Jun 8 | Jul 9 |
| Winter squash | Apr 27 – May 4 | May 25 – Jun 8 | Aug 13 |
| Sweet corn | — | May 18 – Jun 8 | Jul 17 |
| Onion (from sets) | — | Apr 21 – May 12 | Jul 20 |
| Garlic | — | Sep 8 – Oct 6 (fall) | following summer |
| Spinach | — | Apr 21 – May 19 | May 29 |
| Basil | Apr 13 – Apr 27 | May 25 – Jun 8 | Jul 21 |
Garrison'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 |
|---|---|
| 1949 | May 23 |
| 1950 | Jun 3 |
| 1951 | May 10 |
| 1952 | May 28 |
| 1953 | May 15 |
| 1954 | May 10 |
| 1955 | May 9 |
| 1956 | May 5 |
| 1957 | May 23 |
| 1958 | May 22 |
| 1959 | May 27 |
| 1960 | May 7 |
| 1961 | May 9 |
| 1962 | May 7 |
| 1963 | May 22 |
| 1964 | May 12 |
| 1965 | May 28 |
| 1966 | May 13 |
| 1967 | May 19 |
| 1971 | May 20 |
| 1973 | May 17 |
| 1975 | May 2 |
| 1976 | May 7 |
| 1977 | Apr 24 |
| 1978 | Apr 21 |
| 1979 | May 12 |
| 1980 | May 14 |
| 1981 | May 10 |
| 1982 | Jun 1 |
| 1983 | May 16 |
| 1984 | May 26 |
| 1986 | May 17 |
| 1987 | May 21 |
| 1988 | May 9 |
| 1989 | May 6 |
| 1990 | May 14 |
| 1991 | May 8 |
| 1993 | May 20 |
| 1994 | May 5 |
| 1995 | May 25 |
| 1996 | May 13 |
| 1999 | May 8 |
| 2000 | May 18 |
| 2001 | May 25 |
| 2002 | May 24 |
| 2004 | Jun 24 |
| 2005 | May 15 |
| 2006 | May 13 |
| 2007 | May 27 |
| 2009 | May 23 |
| 2010 | May 12 |
| 2011 | May 3 |
| 2012 | Apr 28 |
| 2013 | May 12 |
| 2014 | May 15 |
| 2015 | May 20 |
| 2016 | May 15 |
| 2017 | May 18 |
| 2018 | Apr 28 |
| 2019 | May 9 |
| 2020 | May 13 |
| 2021 | May 11 |
| 2022 | May 21 |
| 2023 | May 2 |
| 2024 | May 1 |
| 2025 | May 17 |
| 2026 | May 10 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1949 | 113 |
| 1950 | 100 |
| 1951 | 135 |
| 1952 | 113 |
| 1953 | 128 |
| 1954 | 133 |
| 1955 | 123 |
| 1956 | 123 |
| 1957 | 118 |
| 1958 | 125 |
| 1959 | 105 |
| 1960 | 132 |
| 1961 | 137 |
| 1962 | 125 |
| 1963 | 141 |
| 1964 | 116 |
| 1966 | 123 |
| 1971 | 118 |
| 1973 | 121 |
| 1975 | 132 |
| 1976 | 138 |
| 1977 | 163 |
| 1979 | 131 |
| 1980 | 124 |
| 1982 | 86 |
| 1983 | 125 |
| 1986 | 111 |
| 1987 | 133 |
| 1988 | 145 |
| 1989 | 127 |
| 1990 | 131 |
| 1991 | 132 |
| 1993 | 116 |
| 1994 | 139 |
| 1995 | 117 |
| 1996 | 138 |
| 1999 | 129 |
| 2000 | 127 |
| 2001 | 131 |
| 2002 | 123 |
| 2004 | 56 |
| 2006 | 128 |
| 2007 | 109 |
| 2010 | 128 |
| 2011 | 133 |
| 2012 | 146 |
| 2013 | 145 |
| 2014 | 140 |
| 2015 | 138 |
| 2016 | 143 |
| 2017 | 143 |
| 2018 | 152 |
| 2019 | 146 |
| 2020 | 117 |
| 2021 | 161 |
| 2022 | 138 |
| 2023 | 157 |
| 2024 | 163 |
| 2025 | 141 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1949 | 16.9 °C |
| 1950 | 12.8 °C |
| 1951 | 13.6 °C |
| 1952 | 16.0 °C |
| 1953 | 13.8 °C |
| 1954 | 13.6 °C |
| 1955 | 15.6 °C |
| 1956 | 13.9 °C |
| 1957 | 14.2 °C |
| 1958 | 14.6 °C |
| 1959 | 15.2 °C |
| 1960 | 15.1 °C |
| 1961 | 15.1 °C |
| 1962 | 14.5 °C |
| 1963 | 15.8 °C |
| 1964 | 14.4 °C |
| 1965 | 13.4 °C |
| 1966 | 14.4 °C |
| 1967 | 14.1 °C |
| 1968 | 13.2 °C |
| 1969 | 15.0 °C |
| 1971 | 14.6 °C |
| 1972 | 13.5 °C |
| 1973 | 14.1 °C |
| 1975 | 13.5 °C |
| 1976 | 16.0 °C |
| 1977 | 16.1 °C |
| 1979 | 13.6 °C |
| 1981 | 15.1 °C |
| 1982 | 13.3 °C |
| 1983 | 14.8 °C |
| 1984 | 15.0 °C |
| 1986 | 14.3 °C |
| 1987 | 16.1 °C |
| 1988 | 16.0 °C |
| 1989 | 15.3 °C |
| 1990 | 14.9 °C |
| 1991 | 15.7 °C |
| 1993 | 12.7 °C |
| 1994 | 14.8 °C |
| 1995 | 14.0 °C |
| 1996 | 13.8 °C |
| 1998 | 15.7 °C |
| 1999 | 14.2 °C |
| 2000 | 14.4 °C |
| 2001 | 15.0 °C |
| 2002 | 14.2 °C |
| 2004 | 13.1 °C |
| 2005 | 14.8 °C |
| 2006 | 15.9 °C |
| 2007 | 15.1 °C |
| 2010 | 14.6 °C |
| 2011 | 14.6 °C |
| 2012 | 16.1 °C |
| 2013 | 14.3 °C |
| 2014 | 14.3 °C |
| 2015 | 15.7 °C |
| 2016 | 15.7 °C |
| 2017 | 15.6 °C |
| 2018 | 15.2 °C |
| 2019 | 14.9 °C |
| 2020 | 15.6 °C |
| 2021 | 16.8 °C |
| 2022 | 15.0 °C |
| 2023 | 16.0 °C |
| 2024 | 16.1 °C |
| 2025 | 16.1 °C |
What this means for you: Since 1949, Garrison's last spring frost has stayed at about the same time of year. The frost-free season has grown by about 3 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Garrison (NOAA GHCN-Daily). Years with too many missing days are left out.