When to plant in Edison, NJ
Planting dates worked out from Edison's own frost records, not a generic zone chart.
Safe to plant out
Apr 26
1 year in 10 has a later frost
Average last frost
Apr 15
about a 50% chance of a later one
Average first fall frost
Oct 23
1 year in 10 by Oct 13
Frost-free days
190
median, 1991–2020
Station used: New Brunswick 3 Se · 5.2 km away · station 34 m, town 27 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 1 – Mar 15 | Apr 26 – May 10 | Jun 20 |
| Sweet pepper | Feb 15 – Mar 1 | Apr 26 – May 10 | Jun 25 |
| Lettuce (leaf) | Feb 15 – Feb 22 | Mar 22 – Apr 5 | May 1 |
| Peas | — | Mar 22 – Apr 19 | May 16 |
| Bush beans | — | Apr 19 – May 10 | Jun 8 |
| Carrot | — | Apr 2 – May 14 | Jun 1 |
| Beet | — | Apr 2 – May 14 | May 22 |
| Potato | — | Apr 2 – Apr 23 | Jun 11 |
| Kale | Feb 15 – Mar 1 | Mar 29 – Apr 12 | May 11 |
| Broccoli | Feb 8 – Feb 22 | Mar 22 – Apr 12 | May 21 |
| Cucumber | Mar 29 – Apr 5 | Apr 26 – May 10 | Jun 15 |
| Summer squash and zucchini | Mar 29 – Apr 5 | Apr 26 – May 10 | Jun 10 |
| Winter squash | Mar 29 – Apr 5 | Apr 26 – May 10 | Jul 15 |
| Sweet corn | — | Apr 19 – May 10 | Jun 18 |
| Onion (from sets) | — | Mar 22 – Apr 12 | Jun 20 |
| Garlic | — | Oct 9 – Nov 6 (fall) | following summer |
| Spinach | — | Mar 22 – Apr 19 | Apr 29 |
| Basil | Mar 15 – Mar 29 | Apr 26 – May 10 | Jun 22 |
Edison'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 |
|---|---|
| 1969 | Apr 13 |
| 1970 | Apr 12 |
| 1971 | Apr 15 |
| 1972 | Apr 10 |
| 1973 | Apr 15 |
| 1974 | Apr 20 |
| 1975 | Apr 22 |
| 1976 | Apr 13 |
| 1977 | Apr 10 |
| 1978 | Apr 9 |
| 1979 | Apr 21 |
| 1980 | Apr 18 |
| 1981 | Apr 22 |
| 1982 | Apr 23 |
| 1983 | May 10 |
| 1984 | Apr 22 |
| 1985 | Apr 12 |
| 1986 | May 4 |
| 1987 | Apr 26 |
| 1988 | Apr 26 |
| 1989 | Apr 24 |
| 1990 | Apr 19 |
| 1991 | Apr 13 |
| 1992 | Apr 15 |
| 1993 | Apr 9 |
| 1994 | Apr 10 |
| 1995 | Apr 17 |
| 1996 | May 14 |
| 1997 | Apr 16 |
| 1998 | Apr 13 |
| 1999 | Apr 25 |
| 2000 | Apr 14 |
| 2001 | Apr 20 |
| 2002 | Apr 25 |
| 2003 | Apr 9 |
| 2004 | Apr 7 |
| 2005 | Apr 17 |
| 2006 | Apr 7 |
| 2007 | Apr 12 |
| 2008 | Apr 4 |
| 2009 | Apr 18 |
| 2010 | Mar 29 |
| 2011 | Mar 30 |
| 2012 | Apr 30 |
| 2013 | Apr 22 |
| 2014 | Apr 21 |
| 2015 | Apr 25 |
| 2016 | Apr 10 |
| 2017 | Apr 9 |
| 2018 | Apr 11 |
| 2019 | Apr 2 |
| 2020 | May 10 |
| 2021 | Apr 3 |
| 2022 | Apr 18 |
| 2023 | Apr 10 |
| 2024 | Apr 22 |
| 2025 | Apr 9 |
| 2026 | Apr 21 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1969 | 192 |
| 1970 | 199 |
| 1971 | 206 |
| 1972 | 183 |
| 1973 | 204 |
| 1974 | 166 |
| 1975 | 191 |
| 1976 | 188 |
| 1977 | 196 |
| 1978 | 189 |
| 1979 | 172 |
| 1980 | 194 |
| 1981 | 170 |
| 1982 | 170 |
| 1983 | 172 |
| 1984 | 167 |
| 1985 | 199 |
| 1986 | 167 |
| 1987 | 169 |
| 1988 | 170 |
| 1989 | 168 |
| 1990 | 191 |
| 1991 | 190 |
| 1992 | 185 |
| 1993 | 187 |
| 1994 | 185 |
| 1995 | 201 |
| 1996 | 150 |
| 1997 | 189 |
| 1998 | 203 |
| 1999 | 172 |
| 2000 | 177 |
| 2001 | 171 |
| 2002 | 182 |
| 2003 | 197 |
| 2004 | 215 |
| 2005 | 192 |
| 2006 | 190 |
| 2007 | 209 |
| 2008 | 198 |
| 2009 | 183 |
| 2010 | 216 |
| 2011 | 211 |
| 2012 | 165 |
| 2013 | 185 |
| 2014 | 181 |
| 2015 | 175 |
| 2016 | 198 |
| 2017 | 215 |
| 2018 | 190 |
| 2019 | 213 |
| 2020 | 173 |
| 2021 | 214 |
| 2022 | 194 |
| 2023 | 205 |
| 2024 | 188 |
| 2025 | 211 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1969 | 19.0 °C |
| 1970 | 19.0 °C |
| 1971 | 18.4 °C |
| 1972 | 18.3 °C |
| 1973 | 19.1 °C |
| 1974 | 18.7 °C |
| 1975 | 18.3 °C |
| 1976 | 18.6 °C |
| 1977 | 19.1 °C |
| 1978 | 18.1 °C |
| 1979 | 18.4 °C |
| 1980 | 19.6 °C |
| 1981 | 19.1 °C |
| 1982 | 17.9 °C |
| 1983 | 19.1 °C |
| 1984 | 18.3 °C |
| 1985 | 18.8 °C |
| 1986 | 18.7 °C |
| 1987 | 19.0 °C |
| 1988 | 18.8 °C |
| 1989 | 18.3 °C |
| 1990 | 18.1 °C |
| 1991 | 19.6 °C |
| 1992 | 17.3 °C |
| 1993 | 18.9 °C |
| 1994 | 19.0 °C |
| 1995 | 18.8 °C |
| 1996 | 18.4 °C |
| 1997 | 17.8 °C |
| 1998 | 19.4 °C |
| 1999 | 19.8 °C |
| 2000 | 18.4 °C |
| 2001 | 19.1 °C |
| 2002 | 19.7 °C |
| 2003 | 18.5 °C |
| 2004 | 19.4 °C |
| 2005 | 20.1 °C |
| 2006 | 19.7 °C |
| 2007 | 19.1 °C |
| 2008 | 19.4 °C |
| 2009 | 18.9 °C |
| 2010 | 21.0 °C |
| 2011 | 20.3 °C |
| 2012 | 20.3 °C |
| 2013 | 19.4 °C |
| 2014 | 19.0 °C |
| 2015 | 20.4 °C |
| 2016 | 20.2 °C |
| 2017 | 19.7 °C |
| 2018 | 20.0 °C |
| 2019 | 20.2 °C |
| 2020 | 19.6 °C |
| 2021 | 20.1 °C |
| 2022 | 20.3 °C |
| 2023 | 19.6 °C |
| 2024 | 20.4 °C |
| 2025 | 20.1 °C |
| 2026 | 20.6 °C |
What this means for you: Since 1969, Edison's last spring frost has come about 1 day earlier per decade, on average. 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 New Brunswick 3 Se (NOAA GHCN-Daily). Years with too many missing days are left out.