When to plant in Rosthern, SK
Planting dates worked out from Rosthern's own frost records, not a generic zone chart.
Safe to plant out
May 28
1 year in 10 has a later frost
Average last frost
May 20
about a 50% chance of a later one
Average first fall frost
Sep 14
1 year in 10 by Sep 1
Frost-free days
117
median, 1991–2020
Station used: Langham 2w · 57.0 km away · station 503 m, town 507 m. How we match towns to stations
The nearest reliable station is 57 km away, so frost dates here may be off by a week or more. Check them against local experience.
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Apr 2 – Apr 16 | May 28 – Jun 11 | Jul 22 |
| Sweet pepper | Mar 19 – Apr 2 | May 28 – Jun 11 | Jul 27 |
| Lettuce (leaf) | Mar 18 – Mar 25 | Apr 22 – May 6 | Jun 1 |
| Peas | — | Apr 8 – May 6 | Jun 2 |
| Bush beans | — | May 21 – Jun 11 | Jul 10 |
| Carrot | — | Apr 29 – Jun 10 | Jun 28 |
| Beet | — | Apr 22 – Jun 3 | Jun 11 |
| Potato | — | Apr 29 – May 20 | Jul 8 |
| Kale | Mar 11 – Mar 25 | Apr 22 – May 6 | Jun 4 |
| Broccoli | Mar 11 – Mar 25 | Apr 22 – May 13 | Jun 21 |
| Cucumber | Apr 30 – May 7 | May 28 – Jun 11 | Jul 17 |
| Summer squash and zucchini | Apr 30 – May 7 | May 28 – Jun 11 | Jul 12 |
| Winter squash | Apr 30 – May 7 | May 28 – Jun 11 | Aug 16 |
| Sweet corn | — | May 21 – Jun 11 | Jul 20 |
| Onion (from sets) | — | Apr 22 – May 13 | Jul 21 |
| Garlic | — | Aug 31 – Sep 28 (fall) | following summer |
| Spinach | — | Apr 8 – May 6 | May 16 |
| Basil | Apr 16 – Apr 30 | May 28 – Jun 11 | Jul 24 |
Rosthern'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 |
|---|---|
| 1991 | May 7 |
| 1992 | May 25 |
| 1993 | May 24 |
| 1994 | May 15 |
| 1995 | May 26 |
| 1996 | May 13 |
| 1997 | May 23 |
| 1998 | Jun 3 |
| 1999 | May 11 |
| 2000 | May 30 |
| 2001 | May 21 |
| 2002 | May 26 |
| 2003 | May 21 |
| 2004 | May 22 |
| 2005 | May 14 |
| 2006 | May 11 |
| 2007 | May 25 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1991 | 120 |
| 1992 | 91 |
| 1993 | 110 |
| 1994 | 141 |
| 1995 | 114 |
| 1996 | 119 |
| 1997 | 113 |
| 1998 | 118 |
| 1999 | 124 |
| 2000 | 103 |
| 2001 | 113 |
| 2002 | 118 |
| 2003 | 117 |
| 2004 | 89 |
| 2005 | 130 |
| 2006 | 129 |
| 2007 | 111 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1991 | 14.2 °C |
| 1992 | 11.5 °C |
| 1993 | 11.8 °C |
| 1994 | 13.2 °C |
| 1995 | 12.3 °C |
| 1996 | 12.5 °C |
| 1997 | 13.2 °C |
| 1998 | 14.6 °C |
| 1999 | 12.8 °C |
| 2000 | 12.8 °C |
| 2001 | 14.5 °C |
| 2002 | 12.4 °C |
| 2003 | 14.2 °C |
| 2004 | 11.6 °C |
| 2005 | 12.8 °C |
| 2006 | 14.5 °C |
| 2007 | 13.2 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Langham 2w (NOAA GHCN-Daily, from Environment and Climate Change Canada). Years with too many missing days are left out.