September · Early autumn
What to sow in September in Calgary
5 crops are in their window this month in Calgary — timed to your local frost dates.
Last frost≈ 22 May
First frost≈ 13 Sep
Frost-free days12 days
September averages6°–19°C
Vegetables
1 in season
Rhubarb
Plant crowns · stop picking by midsummer to let the plant recover
Herbs · nothing to sow this month
Fruit
4 in season
Blackberries
Plant canes · thornless varieties are easiest for small gardens
Currants
Plant canes · prune out canes older than three years each winter
Gooseberries
Plant canes · mind the thorns; pick slightly underripe for pies
Raspberries
Plant canes · ever-bearing types fruit the first autumn