When to plant in Long Grove, IL
Planting dates worked out from Long Grove's own frost records, not a generic zone chart.
Safe to plant out
May 2
1 year in 10 has a later frost
Average last frost
Apr 22
about a 50% chance of a later one
Average first fall frost
Oct 21
1 year in 10 by Oct 7
Frost-free days
176
median, 1991–2020
Station used: Chicago Palwaukee Ap · 10.0 km away · station 192 m, town 223 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 7 – Mar 21 | May 2 – May 16 | Jun 26 |
| Sweet pepper | Feb 21 – Mar 7 | May 2 – May 16 | Jul 1 |
| Lettuce (leaf) | Feb 22 – Mar 1 | Mar 29 – Apr 12 | May 8 |
| Peas | — | Mar 29 – Apr 26 | May 23 |
| Bush beans | — | Apr 25 – May 16 | Jun 14 |
| Carrot | — | Apr 9 – May 21 | Jun 8 |
| Beet | — | Apr 9 – May 21 | May 29 |
| Potato | — | Apr 9 – Apr 30 | Jun 18 |
| Kale | Feb 22 – Mar 8 | Apr 5 – Apr 19 | May 18 |
| Broccoli | Feb 15 – Mar 1 | Mar 29 – Apr 19 | May 28 |
| Cucumber | Apr 4 – Apr 11 | May 2 – May 16 | Jun 21 |
| Summer squash and zucchini | Apr 4 – Apr 11 | May 2 – May 16 | Jun 16 |
| Winter squash | Apr 4 – Apr 11 | May 2 – May 16 | Jul 21 |
| Sweet corn | — | Apr 25 – May 16 | Jun 24 |
| Onion (from sets) | — | Mar 29 – Apr 19 | Jun 27 |
| Garlic | — | Oct 7 – Nov 4 (fall) | following summer |
| Spinach | — | Mar 29 – Apr 26 | May 6 |
| Basil | Mar 21 – Apr 4 | May 2 – May 16 | Jun 28 |
Long Grove'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 |
|---|---|
| 1997 | Apr 18 |
| 1998 | Apr 5 |
| 1999 | Apr 19 |
| 2000 | Apr 22 |
| 2001 | Apr 19 |
| 2002 | Apr 23 |
| 2003 | Apr 23 |
| 2004 | May 3 |
| 2005 | May 3 |
| 2006 | Apr 26 |
| 2007 | Apr 16 |
| 2008 | Apr 30 |
| 2009 | Apr 17 |
| 2010 | Apr 28 |
| 2011 | Apr 21 |
| 2012 | Apr 24 |
| 2013 | Apr 21 |
| 2014 | Apr 16 |
| 2015 | Apr 24 |
| 2016 | Apr 14 |
| 2017 | Apr 1 |
| 2018 | Apr 29 |
| 2019 | Apr 28 |
| 2020 | May 9 |
| 2021 | Apr 22 |
| 2022 | Apr 17 |
| 2023 | Apr 27 |
| 2024 | Apr 25 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1998 | 199 |
| 1999 | 187 |
| 2000 | 167 |
| 2001 | 170 |
| 2002 | 179 |
| 2003 | 160 |
| 2004 | 166 |
| 2005 | 172 |
| 2006 | 168 |
| 2007 | 194 |
| 2008 | 179 |
| 2009 | 175 |
| 2010 | 176 |
| 2011 | 191 |
| 2012 | 166 |
| 2013 | 183 |
| 2014 | 198 |
| 2015 | 175 |
| 2016 | 211 |
| 2017 | 218 |
| 2018 | 166 |
| 2019 | 185 |
| 2020 | 171 |
| 2021 | 193 |
| 2022 | 209 |
| 2023 | 185 |
| 2024 | 174 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1998 | 19.1 °C |
| 1999 | 18.3 °C |
| 2000 | 17.4 °C |
| 2001 | 18.3 °C |
| 2002 | 18.8 °C |
| 2003 | 17.1 °C |
| 2004 | 17.9 °C |
| 2005 | 19.6 °C |
| 2006 | 18.2 °C |
| 2007 | 18.6 °C |
| 2008 | 17.8 °C |
| 2009 | 16.9 °C |
| 2010 | 19.8 °C |
| 2011 | 18.3 °C |
| 2012 | 19.5 °C |
| 2013 | 18.1 °C |
| 2014 | 18.0 °C |
| 2015 | 18.0 °C |
| 2016 | 18.8 °C |
| 2017 | 18.3 °C |
| 2018 | 18.9 °C |
| 2019 | 19.0 °C |
| 2020 | 19.0 °C |
| 2021 | 19.8 °C |
| 2022 | 19.2 °C |
| 2023 | 18.7 °C |
| 2024 | 19.6 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Chicago Palwaukee Ap (NOAA GHCN-Daily). Years with too many missing days are left out.