When to plant in Potosi, MO
Planting dates worked out from Potosi's own frost records, not a generic zone chart.
Safe to plant out
Apr 30
1 year in 10 has a later frost
Average last frost
Apr 13
about a 50% chance of a later one
Average first fall frost
Oct 24
1 year in 10 by Sep 28
Frost-free days
202
median, 1991–2020
Station used: Potosi 4 Sw · 6.5 km away · station 358 m, town 275 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 5 – Mar 19 | Apr 30 – May 14 | Jun 24 |
| Sweet pepper | Feb 19 – Mar 5 | Apr 30 – May 14 | Jun 29 |
| Lettuce (leaf) | Feb 9 – Feb 16 | Mar 16 – Mar 30 | Apr 25 |
| Peas | — | Mar 13 – Apr 10 | May 7 |
| Bush beans | — | Apr 23 – May 14 | Jun 12 |
| Carrot | — | Mar 23 – May 4 | May 22 |
| Beet | — | Mar 21 – May 2 | May 10 |
| Potato | — | Mar 23 – Apr 13 | Jun 1 |
| Kale | Feb 6 – Feb 20 | Mar 20 – Apr 3 | May 2 |
| Broccoli | Feb 2 – Feb 16 | Mar 16 – Apr 6 | May 15 |
| Cucumber | Apr 2 – Apr 9 | Apr 30 – May 14 | Jun 19 |
| Summer squash and zucchini | Apr 2 – Apr 9 | Apr 30 – May 14 | Jun 14 |
| Winter squash | Apr 2 – Apr 9 | Apr 30 – May 14 | Jul 19 |
| Sweet corn | — | Apr 23 – May 14 | Jun 22 |
| Onion (from sets) | — | Mar 16 – Apr 6 | Jun 14 |
| Garlic | — | Oct 10 – Nov 7 (fall) | following summer |
| Spinach | — | Mar 13 – Apr 10 | Apr 20 |
| Basil | Mar 19 – Apr 2 | Apr 30 – May 14 | Jun 26 |
Potosi'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 |
|---|---|
| 1894 | May 21 |
| 1895 | May 22 |
| 1897 | May 31 |
| 1898 | May 8 |
| 1899 | Apr 16 |
| 1900 | May 10 |
| 1901 | Apr 21 |
| 1902 | Apr 27 |
| 1981 | May 15 |
| 1988 | Mar 30 |
| 1989 | Apr 12 |
| 1994 | May 3 |
| 2000 | May 14 |
| 2001 | Apr 24 |
| 2002 | Apr 25 |
| 2003 | Apr 22 |
| 2004 | Apr 14 |
| 2005 | Apr 24 |
| 2007 | Apr 15 |
| 2008 | Apr 30 |
| 2009 | Apr 8 |
| 2010 | Mar 27 |
| 2011 | Apr 5 |
| 2012 | Mar 10 |
| 2013 | Apr 20 |
| 2014 | Mar 30 |
| 2015 | Apr 4 |
| 2016 | Apr 10 |
| 2017 | Mar 17 |
| 2018 | Apr 17 |
| 2019 | Apr 2 |
| 2021 | Apr 23 |
| 2022 | Apr 20 |
| 2023 | Apr 23 |
| 2024 | Apr 6 |
| 2025 | Apr 9 |
| 2026 | Mar 29 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1894 | 139 |
| 1895 | 130 |
| 1897 | 111 |
| 1898 | 122 |
| 1899 | 157 |
| 1900 | 151 |
| 1901 | 149 |
| 1981 | 125 |
| 1988 | 225 |
| 1989 | 189 |
| 2000 | 133 |
| 2001 | 152 |
| 2002 | 170 |
| 2003 | 158 |
| 2005 | 199 |
| 2007 | 204 |
| 2008 | 179 |
| 2009 | 192 |
| 2010 | 215 |
| 2011 | 219 |
| 2012 | 210 |
| 2013 | 187 |
| 2014 | 215 |
| 2015 | 231 |
| 2016 | 216 |
| 2017 | 225 |
| 2018 | 186 |
| 2019 | 211 |
| 2021 | 194 |
| 2022 | 180 |
| 2024 | 192 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1894 | 18.7 °C |
| 1895 | 20.0 °C |
| 1896 | 20.7 °C |
| 1897 | 17.6 °C |
| 1898 | 17.4 °C |
| 1899 | 19.4 °C |
| 1900 | 20.4 °C |
| 1901 | 21.1 °C |
| 1902 | 19.4 °C |
| 1981 | 19.6 °C |
| 1988 | 22.0 °C |
| 1989 | 19.9 °C |
| 2000 | 19.5 °C |
| 2001 | 19.9 °C |
| 2002 | 20.0 °C |
| 2003 | 18.6 °C |
| 2005 | 21.0 °C |
| 2007 | 21.1 °C |
| 2008 | 19.2 °C |
| 2009 | 19.2 °C |
| 2010 | 21.8 °C |
| 2011 | 20.9 °C |
| 2012 | 21.6 °C |
| 2013 | 19.7 °C |
| 2014 | 20.4 °C |
| 2015 | 20.6 °C |
| 2016 | 20.8 °C |
| 2017 | 20.8 °C |
| 2018 | 21.1 °C |
| 2019 | 20.5 °C |
| 2020 | 19.7 °C |
| 2021 | 20.3 °C |
| 2022 | 20.7 °C |
| 2023 | 21.0 °C |
| 2024 | 21.2 °C |
| 2025 | 21.3 °C |
| 2026 | 22.0 °C |
What this means for you: Since 1894, Potosi's last spring frost has come about 2 days earlier per decade, on average. The frost-free season has grown by about 5 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Potosi 4 Sw (NOAA GHCN-Daily). Years with too many missing days are left out.