When to plant fava bean in Calgary

In Calgary, typical last spring frost is May 16 and typical first fall frost is September 25. Typical last spring frost: May 16. Fava bean in Calgary is a good fit outdoors. The suitable growing window of 158 days covers the 80–110 days this plant usually needs.

Fava bean

How to grow Fava bean Calgary climate Weekly temperatures and windows

Where are you growing?

Comfortable

Tight fit in greenhouse

Comfortable in a cold frame

Fava bean in Calgary is a good fit outdoors. The suitable growing window of 158 days covers the 80–110 days this plant usually needs.

When to plantApril 21 – June 12

Harvest: July 10 – October 5
Season vs crop: 158 grow days vs 80–110 needed
Typical frost (last spring – first fall): May 16 – September 25

Fava bean in Calgary is a good fit outdoors. The suitable growing window of 158 days covers the 80–110 days this plant usually needs.

Planting conditions

Direct sow
Grow outdoors
Harvest

Local activity windows for this place and growing method. Blue fill is usually too cold for this plant. Dashed lines are typical last and first frost.

Suitable growing days in a row158

Days to harvest80–110 days from seed

Apr 21 – Jun 12

Direct sow

Jun 13 – Jul 9

Grow outdoors

Jul 10 – Oct 5

Harvest

Activity	Window	Notes
Direct sow	Apr 21 – Jun 12	Plant outdoors in this window.
Grow outdoors	Jun 13 – Jul 9	Plants grow outdoors until harvest.
Harvest	Jul 10 – Oct 5	Expected harvest from typical days to harvest.

Direct sow
Grow outdoors
Harvest

Blue fill is usually too cold for this plant. Dashed lines are typical last and first frost (35 seasons (1991–2025)). Adjust a week or two for your conditions.

Planting and growing across the year

Planting is the sow / plant-out window. Growing is daytime air versus this plant’s ideal (15 – 21 °C59 – 70 °F15 – 21 °C (59 – 70 °F)) and tolerable (4 – 24 °C39 – 75 °F4 – 24 °C (39 – 75 °F)) ranges.

Ideal / plantable
Tolerable
Too cold
Too hot
Outside window

Planting uses sow / plant-out rules; growing shows daytime air against this plant’s ideal and tolerable ranges.

Key dates

Typical last spring frostMay 16

Low-risk last spring frostMay 26

Typical first fall frostSeptember 25

Low-risk first fall frostSeptember 15

Frost-free days131

Outdoor sow dateApril 21

Direct sow windowApril 21 – June 12

Suitable growing windowApril 21 – September 25 (158 days)

Expected harvestJuly 10 – October 5

How these dates are judged

Ideal conditions: Daytime air from 15 – 21 °C59 – 70 °F15 – 21 °C (59 – 70 °F).
Suitable conditions: Daytime air from 4 – 24 °C39 – 75 °F4 – 24 °C (39 – 75 °F).
Last frost and first frost: Typical spring and fall frost dates for Calgary, shown in the key dates.
Days to harvest: 80–110 days from seed, from typical days to harvest.
Sowing window: Dated sow and harvest bars use frost dates, soil minima, night limits, and last-sow count-back from typical crop timing. Air ratings on the weekly chart colour only weeks inside that same window — see weekly temperatures and windows.

Other plants for Calgary

Calculated by Plan & Plant. Method. Data 35 seasons (1991–2025).

Frost and suitability dates are typical figures from climate statistics.

Based on 35 years (1991–2025) of ERA5-Land data from Open-Meteo, for an area of about 10 km. Typical dates, not a guarantee.

Dates for Calgary use ERA5-Land cell 51.00, -114.10. How we calculated this · Algorithm 2026-10-season-10.

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