When to plant in Hanna, AB
Planting dates worked out from Hanna's own frost records, not a generic zone chart.
Safe to plant out
Jun 10
1 year in 10 has a later frost
Average last frost
May 25
about a 50% chance of a later one
Average first fall frost
Sep 12
1 year in 10 by Sep 3
Frost-free days
108
median, 1991–2020
Station used: Craigmyle · 30.2 km away · station 846 m, town 826 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 15 – Apr 29 | Jun 10 – Jun 24 | Aug 4 |
| Sweet pepper | Apr 1 – Apr 15 | Jun 10 – Jun 24 | Aug 9 |
| Lettuce (leaf) | Mar 23 – Mar 30 | Apr 27 – May 11 | Jun 6 |
| Peas | — | Apr 25 – May 23 | Jun 19 |
| Bush beans | — | Jun 3 – Jun 24 | Jul 23 |
| Carrot | — | May 4 – Jun 15 | Jul 3 |
| Beet | — | May 4 – Jun 15 | Jun 23 |
| Potato | — | May 4 – May 25 | Jul 13 |
| Kale | Mar 21 – Apr 4 | May 2 – May 16 | Jun 14 |
| Broccoli | Mar 16 – Mar 30 | Apr 27 – May 18 | Jun 26 |
| Cucumber | May 13 – May 20 | Jun 10 – Jun 24 | Jul 30 |
| Summer squash and zucchini | May 13 – May 20 | Jun 10 – Jun 24 | Jul 25 |
| Winter squash | May 13 – May 20 | Jun 10 – Jun 24 | Aug 29 |
| Sweet corn | — | Jun 3 – Jun 24 | Aug 2 |
| Onion (from sets) | — | Apr 27 – May 18 | Jul 26 |
| Garlic | — | Aug 29 – Sep 26 (fall) | following summer |
| Spinach | — | Apr 25 – May 23 | Jun 2 |
| Basil | Apr 29 – May 13 | Jun 10 – Jun 24 | Aug 6 |
Hanna'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 |
|---|---|
| 1963 | May 21 |
| 1964 | Jun 1 |
| 1965 | May 21 |
| 1966 | May 15 |
| 1967 | Jun 23 |
| 1968 | Jun 14 |
| 1969 | Jun 14 |
| 1970 | May 21 |
| 1971 | Jul 3 |
| 1972 | May 12 |
| 1973 | May 22 |
| 1974 | May 30 |
| 1975 | May 22 |
| 1977 | Jun 11 |
| 1978 | May 12 |
| 1979 | Jun 16 |
| 1986 | May 17 |
| 1987 | May 22 |
| 1988 | May 21 |
| 1990 | May 16 |
| 1991 | May 7 |
| 1992 | May 21 |
| 1993 | May 3 |
| 1994 | May 21 |
| 1995 | May 26 |
| 1996 | May 24 |
| 1997 | May 23 |
| 1998 | Jun 8 |
| 1999 | Jun 8 |
| 2000 | Jun 17 |
| 2001 | May 21 |
| 2002 | May 25 |
| 2003 | May 20 |
| 2004 | Jun 17 |
| 2005 | May 28 |
| 2006 | May 4 |
| 2007 | May 6 |
| 2008 | May 13 |
| 2009 | Jun 9 |
| 2010 | Jun 1 |
| 2011 | May 30 |
| 2012 | May 27 |
| 2013 | Jun 11 |
| 2014 | Jun 6 |
| 2015 | May 29 |
| 2017 | May 16 |
| 2018 | May 3 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1963 | 137 |
| 1964 | 96 |
| 1965 | 101 |
| 1966 | 137 |
| 1967 | 91 |
| 1968 | 62 |
| 1969 | 92 |
| 1970 | 110 |
| 1971 | 75 |
| 1972 | 114 |
| 1973 | 88 |
| 1974 | 93 |
| 1975 | 92 |
| 1977 | 59 |
| 1978 | 81 |
| 1986 | 111 |
| 1987 | 116 |
| 1988 | 110 |
| 1990 | 133 |
| 1991 | 124 |
| 1992 | 93 |
| 1993 | 132 |
| 1994 | 122 |
| 1995 | 115 |
| 1996 | 104 |
| 1997 | 117 |
| 1998 | 109 |
| 1999 | 84 |
| 2000 | 94 |
| 2001 | 107 |
| 2002 | 119 |
| 2003 | 118 |
| 2004 | 80 |
| 2005 | 106 |
| 2006 | 136 |
| 2007 | 124 |
| 2008 | 113 |
| 2009 | 91 |
| 2010 | 87 |
| 2011 | 106 |
| 2012 | 106 |
| 2013 | 99 |
| 2014 | 89 |
| 2015 | 110 |
| 2017 | 122 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1963 | 13.4 °C |
| 1964 | 12.2 °C |
| 1965 | 11.7 °C |
| 1966 | 12.2 °C |
| 1967 | 12.4 °C |
| 1968 | 11.5 °C |
| 1969 | 12.9 °C |
| 1970 | 12.9 °C |
| 1971 | 12.8 °C |
| 1972 | 11.8 °C |
| 1973 | 11.9 °C |
| 1974 | 11.0 °C |
| 1975 | 10.8 °C |
| 1976 | 13.1 °C |
| 1977 | 12.3 °C |
| 1978 | 12.3 °C |
| 1986 | 11.7 °C |
| 1987 | 13.2 °C |
| 1988 | 13.2 °C |
| 1989 | 12.8 °C |
| 1990 | 12.8 °C |
| 1991 | 12.9 °C |
| 1992 | 11.7 °C |
| 1993 | 11.7 °C |
| 1994 | 13.1 °C |
| 1995 | 11.7 °C |
| 1996 | 11.4 °C |
| 1997 | 12.1 °C |
| 1998 | 13.7 °C |
| 1999 | 11.6 °C |
| 2000 | 12.2 °C |
| 2001 | 13.5 °C |
| 2002 | 11.8 °C |
| 2003 | 12.7 °C |
| 2004 | 11.8 °C |
| 2005 | 11.8 °C |
| 2006 | 13.9 °C |
| 2007 | 12.5 °C |
| 2008 | 11.8 °C |
| 2009 | 12.1 °C |
| 2010 | 10.7 °C |
| 2011 | 11.5 °C |
| 2012 | 12.6 °C |
| 2013 | 11.8 °C |
| 2014 | 12.0 °C |
| 2015 | 12.3 °C |
| 2016 | 13.5 °C |
| 2017 | 13.4 °C |
| 2018 | 11.9 °C |
What this means for you: Since 1963, Hanna's last spring frost has come about 1 day earlier per decade, on average. The frost-free season has grown by about 2 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Craigmyle (NOAA GHCN-Daily, from Environment and Climate Change Canada). Years with too many missing days are left out.