When to plant in Mifflinville, PA
Planting dates worked out from Mifflinville's own frost records, not a generic zone chart.
Station used: Sunbury · 43.4 km away · station 175 m, town 157 m. How we match towns to stations
The nearest reliable station is 43 km away, so frost dates here may be off by a week or more. Check them against local experience.
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Mar 23 – Apr 6 | May 18 – Jun 1 | Jul 12 |
| Sweet pepper | Mar 9 – Mar 23 | May 18 – Jun 1 | Jul 17 |
| Lettuce (leaf) | Mar 1 – Mar 8 | Apr 5 – Apr 19 | May 15 |
| Peas | — | Mar 30 – Apr 27 | May 24 |
| Bush beans | — | May 11 – Jun 1 | Jun 30 |
| Carrot | — | Apr 12 – May 24 | Jun 11 |
| Beet | — | Apr 8 – May 20 | May 28 |
| Potato | — | Apr 12 – May 3 | Jun 21 |
| Kale | Feb 23 – Mar 9 | Apr 6 – Apr 20 | May 19 |
| Broccoli | Feb 22 – Mar 8 | Apr 5 – Apr 26 | Jun 4 |
| Cucumber | Apr 20 – Apr 27 | May 18 – Jun 1 | Jul 7 |
| Summer squash and zucchini | Apr 20 – Apr 27 | May 18 – Jun 1 | Jul 2 |
| Winter squash | Apr 20 – Apr 27 | May 18 – Jun 1 | Aug 6 |
| Sweet corn | — | May 11 – Jun 1 | Jul 10 |
| Onion (from sets) | — | Apr 5 – Apr 26 | Jul 4 |
| Garlic | — | Oct 2 – Oct 30 (fall) | following summer |
| Spinach | — | Mar 30 – Apr 27 | May 7 |
| Basil | Apr 6 – Apr 20 | May 18 – Jun 1 | Jul 14 |
Mifflinville's weather over time
How the growing season has shifted here, year by year, from the station's own records.
See the data as a table
| Year | Last spring frost |
|---|---|
| 1958 | May 10 |
| 1959 | Apr 24 |
| 1960 | May 3 |
| 1961 | May 5 |
| 1962 | May 11 |
| 1963 | May 25 |
| 1964 | May 4 |
| 1966 | May 12 |
| 1967 | May 13 |
| 1969 | Apr 25 |
| 1970 | Apr 13 |
| 1971 | May 1 |
| 1972 | Apr 30 |
| 1973 | May 16 |
| 1974 | May 9 |
| 1975 | Apr 29 |
| 2006 | Apr 29 |
| 2007 | May 15 |
| 2008 | Apr 16 |
| 2009 | May 20 |
| 2010 | May 12 |
| 2011 | Apr 22 |
| 2012 | May 1 |
| 2013 | May 15 |
| 2014 | Apr 28 |
| 2015 | Apr 26 |
| 2016 | Apr 24 |
| 2017 | May 9 |
| 2018 | Apr 24 |
| 2019 | Apr 30 |
| 2020 | May 21 |
| 2021 | Apr 24 |
| 2022 | May 1 |
| 2023 | May 19 |
| 2024 | Apr 27 |
| 2025 | Apr 18 |
| 2026 | May 12 |
See the data as a table
| Year | Frost-free days |
|---|---|
| 1958 | 144 |
| 1959 | 178 |
| 1960 | 171 |
| 1961 | 152 |
| 1962 | 132 |
| 1963 | 111 |
| 1964 | 132 |
| 1966 | 147 |
| 1967 | 162 |
| 1969 | 180 |
| 1970 | 218 |
| 1971 | 187 |
| 1972 | 163 |
| 1973 | 156 |
| 1974 | 146 |
| 1975 | 184 |
| 2006 | 166 |
| 2007 | 166 |
| 2008 | 173 |
| 2009 | 146 |
| 2010 | 160 |
| 2011 | 188 |
| 2012 | 164 |
| 2013 | 159 |
| 2014 | 174 |
| 2015 | 175 |
| 2016 | 169 |
| 2017 | 160 |
| 2018 | 177 |
| 2019 | 171 |
| 2020 | 122 |
| 2021 | 192 |
| 2022 | 160 |
| 2023 | 157 |
| 2024 | 167 |
| 2025 | 174 |
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1958 | 17.7 °C |
| 1959 | 19.4 °C |
| 1960 | 18.3 °C |
| 1961 | 18.1 °C |
| 1962 | 17.6 °C |
| 1963 | 16.9 °C |
| 1964 | 17.3 °C |
| 1965 | 17.4 °C |
| 1966 | 17.0 °C |
| 1967 | 16.7 °C |
| 1969 | 17.8 °C |
| 1970 | 18.1 °C |
| 1971 | 17.2 °C |
| 1972 | 17.0 °C |
| 1973 | 18.1 °C |
| 1974 | 17.3 °C |
| 1975 | 17.4 °C |
| 2006 | 17.4 °C |
| 2007 | 17.3 °C |
| 2008 | 16.9 °C |
| 2009 | 16.8 °C |
| 2010 | 18.7 °C |
| 2011 | 18.4 °C |
| 2012 | 18.9 °C |
| 2013 | 18.0 °C |
| 2014 | 17.4 °C |
| 2015 | 18.7 °C |
| 2016 | 18.6 °C |
| 2017 | 18.1 °C |
| 2018 | 18.5 °C |
| 2019 | 18.6 °C |
| 2020 | 18.1 °C |
| 2021 | 18.8 °C |
| 2022 | 18.7 °C |
| 2023 | 17.9 °C |
| 2024 | 18.8 °C |
| 2025 | 18.4 °C |
| 2026 | 18.3 °C |
What this means for you: Since 1958, Mifflinville's last spring frost has stayed at about the same time of year. The frost-free season has grown by about 1 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Sunbury (NOAA GHCN-Daily). Years with too many missing days are left out.