When to plant in Delson, QC
Planting dates worked out from Delson's own frost records, not a generic zone chart.
Safe to plant out
May 12
1 year in 10 has a later frost
Average last frost
May 2
about a 50% chance of a later one
Average first fall frost
Oct 10
1 year in 10 by Sep 30
Frost-free days
158
median, 1991–2020
Station used: L'acadie · 17.6 km away · station 44 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 17 – Mar 31 | May 12 – May 26 | Jul 6 |
| Sweet pepper | Mar 3 – Mar 17 | May 12 – May 26 | Jul 11 |
| Lettuce (leaf) | Mar 12 – Mar 19 | Apr 16 – Apr 30 | May 26 |
| Peas | — | Apr 16 – May 14 | Jun 10 |
| Bush beans | — | May 6 – May 27 | Jun 25 |
| Carrot | — | Apr 23 – Jun 4 | Jun 22 |
| Beet | — | Apr 23 – Jun 4 | Jun 12 |
| Potato | — | Apr 23 – May 14 | Jul 2 |
| Kale | Mar 12 – Mar 26 | Apr 23 – May 7 | Jun 5 |
| Broccoli | Mar 5 – Mar 19 | Apr 16 – May 7 | Jun 15 |
| Cucumber | Apr 14 – Apr 21 | May 12 – May 26 | Jul 1 |
| Summer squash and zucchini | Apr 14 – Apr 21 | May 12 – May 26 | Jun 26 |
| Winter squash | Apr 14 – Apr 21 | May 12 – May 26 | Jul 31 |
| Sweet corn | — | May 6 – May 27 | Jul 5 |
| Onion (from sets) | — | Apr 16 – May 7 | Jul 15 |
| Garlic | — | Sep 26 – Oct 24 (fall) | following summer |
| Spinach | — | Apr 16 – May 14 | May 24 |
| Basil | Mar 31 – Apr 14 | May 12 – May 26 | Jul 8 |
Delson'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 |
|---|---|
| 1995 | May 7 |
| 1996 | Apr 24 |
| 1997 | May 5 |
| 1998 | Apr 27 |
| 1999 | Apr 25 |
| 2000 | Apr 26 |
| 2001 | May 6 |
| 2002 | May 8 |
| 2003 | Apr 25 |
| 2004 | May 8 |
| 2005 | May 13 |
| 2006 | Apr 29 |
| 2007 | Apr 11 |
| 2008 | May 2 |
| 2010 | May 11 |
| 2011 | Apr 22 |
| 2012 | Apr 30 |
| 2014 | Apr 20 |
| 2015 | Apr 16 |
| 2016 | May 9 |
| 2017 | May 9 |
| 2018 | May 12 |
| 2019 | May 8 |
| 2020 | May 13 |
| 2021 | May 7 |
| 2022 | Apr 23 |
| 2023 | May 18 |
| 2024 | Apr 26 |
| 2025 | Apr 21 |
| 2026 | Apr 24 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1995 | 175 |
| 1996 | 161 |
| 1997 | 149 |
| 1998 | 160 |
| 1999 | 162 |
| 2000 | 154 |
| 2001 | 154 |
| 2002 | 158 |
| 2003 | 163 |
| 2004 | 149 |
| 2005 | 159 |
| 2006 | 160 |
| 2007 | 184 |
| 2008 | 158 |
| 2010 | 153 |
| 2011 | 188 |
| 2012 | 164 |
| 2014 | 151 |
| 2015 | 181 |
| 2016 | 154 |
| 2017 | 159 |
| 2018 | 153 |
| 2019 | 149 |
| 2020 | 128 |
| 2021 | 174 |
| 2022 | 162 |
| 2023 | 164 |
| 2024 | 173 |
| 2025 | 170 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1995 | 15.3 °C |
| 1996 | 15.4 °C |
| 1997 | 14.6 °C |
| 1998 | 16.5 °C |
| 1999 | 16.9 °C |
| 2000 | 14.7 °C |
| 2001 | 16.2 °C |
| 2002 | 15.9 °C |
| 2003 | 15.8 °C |
| 2004 | 15.1 °C |
| 2005 | 16.4 °C |
| 2006 | 15.9 °C |
| 2007 | 15.8 °C |
| 2008 | 15.8 °C |
| 2009 | 15.6 °C |
| 2010 | 16.7 °C |
| 2011 | 16.2 °C |
| 2012 | 16.6 °C |
| 2014 | 15.6 °C |
| 2015 | 16.3 °C |
| 2016 | 15.6 °C |
| 2017 | 15.6 °C |
| 2018 | 16.2 °C |
| 2019 | 15.2 °C |
| 2020 | 15.6 °C |
| 2021 | 16.8 °C |
| 2022 | 16.1 °C |
| 2023 | 16.4 °C |
| 2024 | 17.1 °C |
| 2025 | 16.1 °C |
| 2026 | 16.0 °C |
What this means for you: Since 1995, Delson'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 L'acadie (NOAA GHCN-Daily, from Environment and Climate Change Canada). Years with too many missing days are left out.