When to plant in Carleton, QC
Planting dates worked out from Carleton's own frost records, not a generic zone chart.
Safe to plant out
May 27
1 year in 10 has a later frost
Average last frost
May 17
about a 50% chance of a later one
Average first fall frost
Oct 2
1 year in 10 by Sep 19
Frost-free days
138
median, 1991–2020
Station used: Charlo Auto · 20.3 km away · station 42 m, town 13 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 | Apr 7 – Apr 21 | Jun 2 – Jun 16 | Jul 27 |
| Sweet pepper | Mar 24 – Apr 7 | Jun 2 – Jun 16 | Aug 1 |
| Lettuce (leaf) | Mar 29 – Apr 5 | May 3 – May 17 | Jun 12 |
| Peas | — | May 3 – May 31 | Jun 27 |
| Bush beans | — | May 28 – Jun 18 | Jul 17 |
| Carrot | — | May 12 – Jun 23 | Jul 11 |
| Beet | — | May 12 – Jun 23 | Jul 1 |
| Potato | — | May 12 – Jun 2 | Jul 21 |
| Kale | Mar 29 – Apr 12 | May 10 – May 24 | Jun 22 |
| Broccoli | Mar 22 – Apr 5 | May 3 – May 24 | Jul 2 |
| Cucumber | May 5 – May 12 | Jun 2 – Jun 16 | Jul 22 |
| Summer squash and zucchini | May 5 – May 12 | Jun 2 – Jun 16 | Jul 17 |
| Winter squash | May 5 – May 12 | Jun 2 – Jun 16 | Aug 21 |
| Sweet corn | — | May 28 – Jun 18 | Jul 27 |
| Onion (from sets) | — | May 3 – May 24 | Aug 1 |
| Garlic | — | Sep 18 – Oct 16 (fall) | following summer |
| Spinach | — | May 3 – May 31 | Jun 10 |
| Basil | Apr 21 – May 5 | Jun 2 – Jun 16 | Jul 29 |
Carleton'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 |
|---|---|
| 2004 | May 24 |
| 2005 | May 26 |
| 2006 | May 9 |
| 2007 | May 23 |
| 2008 | May 15 |
| 2009 | May 27 |
| 2010 | May 12 |
| 2011 | May 22 |
| 2012 | May 8 |
| 2013 | May 5 |
| 2014 | May 28 |
| 2015 | May 4 |
| 2016 | May 13 |
| 2017 | May 1 |
| 2018 | Jun 4 |
| 2019 | May 14 |
| 2020 | May 24 |
| 2021 | May 29 |
| 2022 | May 11 |
| 2023 | May 23 |
| 2024 | May 13 |
| 2025 | May 6 |
| 2026 | May 23 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 2004 | 134 |
| 2005 | 138 |
| 2006 | 149 |
| 2007 | 148 |
| 2008 | 126 |
| 2009 | 120 |
| 2010 | 136 |
| 2011 | 136 |
| 2012 | 152 |
| 2013 | 160 |
| 2014 | 112 |
| 2015 | 157 |
| 2016 | 143 |
| 2017 | 153 |
| 2018 | 110 |
| 2019 | 144 |
| 2020 | 115 |
| 2021 | 132 |
| 2022 | 143 |
| 2023 | 152 |
| 2024 | 149 |
| 2025 | 148 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 2004 | 12.3 °C |
| 2005 | 13.1 °C |
| 2006 | 13.4 °C |
| 2007 | 12.1 °C |
| 2008 | 11.8 °C |
| 2009 | 12.2 °C |
| 2010 | 13.5 °C |
| 2011 | 11.8 °C |
| 2012 | 13.3 °C |
| 2013 | 12.8 °C |
| 2014 | 12.8 °C |
| 2015 | 12.7 °C |
| 2016 | 12.4 °C |
| 2017 | 12.6 °C |
| 2018 | 12.5 °C |
| 2019 | 11.9 °C |
| 2020 | 12.8 °C |
| 2021 | 13.6 °C |
| 2022 | 13.0 °C |
| 2023 | 13.4 °C |
| 2024 | 14.2 °C |
| 2025 | 13.2 °C |
| 2026 | 12.7 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Charlo Auto (NOAA GHCN-Daily, from Environment and Climate Change Canada). Years with too many missing days are left out.