When to plant in Princeton, MO
Planting dates worked out from Princeton's own frost records, not a generic zone chart.
Safe to plant out
May 5
1 year in 10 has a later frost
Average last frost
Apr 21
about a 50% chance of a later one
Average first fall frost
Oct 15
1 year in 10 by Sep 30
Frost-free days
176
median, 1991–2020
Station used: Princeton · 0.4 km away · station 299 m, town 293 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 10 – Mar 24 | May 5 – May 19 | Jun 29 |
| Sweet pepper | Feb 24 – Mar 10 | May 5 – May 19 | Jul 4 |
| Lettuce (leaf) | Feb 17 – Feb 24 | Mar 24 – Apr 7 | May 3 |
| Peas | — | Mar 20 – Apr 17 | May 14 |
| Bush beans | — | Apr 28 – May 19 | Jun 17 |
| Carrot | — | Mar 31 – May 12 | May 30 |
| Beet | — | Mar 30 – May 11 | May 19 |
| Potato | — | Mar 31 – Apr 21 | Jun 9 |
| Kale | Feb 13 – Feb 27 | Mar 27 – Apr 10 | May 9 |
| Broccoli | Feb 10 – Feb 24 | Mar 24 – Apr 14 | May 23 |
| Cucumber | Apr 7 – Apr 14 | May 5 – May 19 | Jun 24 |
| Summer squash and zucchini | Apr 7 – Apr 14 | May 5 – May 19 | Jun 19 |
| Winter squash | Apr 7 – Apr 14 | May 5 – May 19 | Jul 24 |
| Sweet corn | — | Apr 28 – May 19 | Jun 27 |
| Onion (from sets) | — | Mar 24 – Apr 14 | Jun 22 |
| Garlic | — | Oct 1 – Oct 29 (fall) | following summer |
| Spinach | — | Mar 20 – Apr 17 | Apr 27 |
| Basil | Mar 24 – Apr 7 | May 5 – May 19 | Jul 1 |
Princeton'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 |
|---|---|
| 1893 | Apr 23 |
| 1894 | Apr 11 |
| 1895 | Apr 3 |
| 1896 | Apr 3 |
| 1897 | Apr 19 |
| 1898 | Apr 7 |
| 1899 | Apr 9 |
| 1900 | Apr 12 |
| 1901 | Apr 20 |
| 1902 | Apr 13 |
| 1903 | May 3 |
| 1904 | Apr 21 |
| 1905 | Apr 17 |
| 1906 | May 9 |
| 1953 | Apr 27 |
| 1954 | May 20 |
| 1955 | Apr 9 |
| 1956 | May 16 |
| 1957 | May 5 |
| 1958 | Apr 30 |
| 1959 | May 15 |
| 1960 | Apr 30 |
| 1961 | May 2 |
| 1962 | Apr 17 |
| 1963 | May 23 |
| 1964 | Apr 9 |
| 1965 | Apr 29 |
| 1966 | May 14 |
| 1967 | May 21 |
| 1968 | Apr 24 |
| 1969 | Apr 29 |
| 1970 | May 2 |
| 1972 | Apr 25 |
| 1974 | Apr 14 |
| 1975 | Apr 20 |
| 1976 | May 3 |
| 1977 | Apr 6 |
| 1978 | Apr 21 |
| 1979 | Apr 28 |
| 1980 | Apr 17 |
| 1981 | Apr 15 |
| 1983 | Apr 19 |
| 1984 | Apr 30 |
| 1985 | Apr 9 |
| 1986 | Apr 22 |
| 1987 | Apr 12 |
| 1988 | Apr 28 |
| 1989 | May 7 |
| 1990 | Apr 17 |
| 1991 | Apr 24 |
| 1992 | Apr 22 |
| 1993 | Apr 6 |
| 1994 | Apr 7 |
| 1995 | Apr 13 |
| 1996 | Apr 30 |
| 1997 | May 1 |
| 1998 | Apr 17 |
| 1999 | Apr 18 |
| 2000 | Apr 12 |
| 2013 | May 12 |
| 2014 | Apr 18 |
| 2016 | Apr 13 |
| 2017 | Apr 24 |
| 2018 | Apr 26 |
| 2019 | Apr 21 |
| 2020 | May 10 |
| 2021 | Apr 22 |
| 2022 | Apr 27 |
| 2023 | May 4 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1893 | 174 |
| 1894 | 180 |
| 1895 | 179 |
| 1896 | 171 |
| 1897 | 192 |
| 1898 | 189 |
| 1899 | 172 |
| 1900 | 209 |
| 1902 | 183 |
| 1903 | 167 |
| 1904 | 184 |
| 1905 | 177 |
| 1906 | 153 |
| 1954 | 150 |
| 1955 | 154 |
| 1956 | 143 |
| 1957 | 146 |
| 1958 | 153 |
| 1959 | 146 |
| 1960 | 172 |
| 1961 | 148 |
| 1962 | 189 |
| 1963 | 157 |
| 1964 | 178 |
| 1965 | 165 |
| 1966 | 139 |
| 1967 | 130 |
| 1968 | 162 |
| 1969 | 167 |
| 1970 | 165 |
| 1972 | 164 |
| 1974 | 170 |
| 1975 | 180 |
| 1976 | 155 |
| 1977 | 187 |
| 1978 | 168 |
| 1979 | 159 |
| 1980 | 168 |
| 1983 | 154 |
| 1984 | 148 |
| 1985 | 167 |
| 1986 | 166 |
| 1987 | 173 |
| 1988 | 158 |
| 1989 | 139 |
| 1990 | 187 |
| 1991 | 147 |
| 1992 | 177 |
| 1993 | 186 |
| 1994 | 186 |
| 1995 | 161 |
| 1996 | 183 |
| 1997 | 173 |
| 1998 | 200 |
| 1999 | 182 |
| 2000 | 176 |
| 2013 | 168 |
| 2016 | 182 |
| 2017 | 186 |
| 2018 | 171 |
| 2019 | 173 |
| 2020 | 158 |
| 2021 | 193 |
| 2022 | 163 |
| 2023 | 158 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1893 | 19.9 °C |
| 1894 | 21.7 °C |
| 1895 | 21.1 °C |
| 1896 | 21.3 °C |
| 1897 | 20.9 °C |
| 1898 | 20.9 °C |
| 1899 | 20.4 °C |
| 1900 | 21.5 °C |
| 1901 | 22.2 °C |
| 1902 | 19.5 °C |
| 1903 | 19.5 °C |
| 1904 | 19.4 °C |
| 1905 | 20.5 °C |
| 1906 | 21.5 °C |
| 1952 | 20.1 °C |
| 1953 | 20.2 °C |
| 1954 | 21.4 °C |
| 1955 | 21.4 °C |
| 1956 | 20.6 °C |
| 1957 | 20.0 °C |
| 1958 | 19.7 °C |
| 1959 | 20.6 °C |
| 1960 | 20.1 °C |
| 1961 | 18.9 °C |
| 1962 | 20.2 °C |
| 1963 | 20.8 °C |
| 1964 | 20.4 °C |
| 1965 | 20.1 °C |
| 1966 | 18.6 °C |
| 1967 | 18.5 °C |
| 1968 | 19.8 °C |
| 1969 | 19.9 °C |
| 1970 | 20.3 °C |
| 1972 | 20.3 °C |
| 1974 | 19.3 °C |
| 1975 | 19.4 °C |
| 1976 | 19.6 °C |
| 1977 | 20.8 °C |
| 1978 | 19.3 °C |
| 1979 | 19.1 °C |
| 1980 | 20.8 °C |
| 1983 | 20.1 °C |
| 1984 | 18.9 °C |
| 1985 | 18.9 °C |
| 1986 | 19.2 °C |
| 1987 | 20.3 °C |
| 1988 | 20.4 °C |
| 1989 | 18.2 °C |
| 1990 | 19.4 °C |
| 1991 | 20.7 °C |
| 1992 | 18.2 °C |
| 1993 | 18.6 °C |
| 1994 | 19.1 °C |
| 1995 | 18.4 °C |
| 1996 | 18.0 °C |
| 1997 | 18.1 °C |
| 1998 | 20.0 °C |
| 1999 | 19.4 °C |
| 2013 | 18.7 °C |
| 2016 | 19.4 °C |
| 2017 | 19.4 °C |
| 2018 | 19.5 °C |
| 2019 | 19.3 °C |
| 2020 | 18.6 °C |
| 2021 | 19.4 °C |
| 2022 | 19.0 °C |
| 2023 | 19.5 °C |
What this means for you: Since 1893, Princeton'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 Princeton (NOAA GHCN-Daily). Years with too many missing days are left out.