When to plant parsley in Ottawa

In Ottawa, typical last spring frost is April 28 and typical first fall frost is October 29. Typical last spring frost: April 28. Parsley in Ottawa is a good fit outdoors. The suitable growing window of 195 days covers the 70–80 days this plant usually needs.

Parsley

How to grow Parsley Ottawa climate Weekly temperatures and windows

Where are you growing?

Comfortable

Comfortable in greenhouse

Comfortable in a cold frame

Parsley in Ottawa is a good fit outdoors. The suitable growing window of 195 days covers the 70–80 days this plant usually needs.

When to plantApril 14 – June 8

Harvest: June 23 – August 27
Season vs crop: 195 grow days vs 70–80 needed
Typical frost (last spring – first fall): April 28 – October 29

Parsley in Ottawa is a good fit outdoors. The suitable growing window of 195 days covers the 70–80 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 row195

Days to harvest70–80 days from seed

Apr 14 – Jun 8

Direct sow

Jun 9 – Jun 22

Grow outdoors

Jun 23 – Aug 27

Harvest

Activity	Window	Notes
Direct sow	Apr 14 – Jun 8	Plant outdoors in this window.
Grow outdoors	Jun 9 – Jun 22	Plants grow outdoors until harvest.
Harvest	Jun 23 – Aug 27	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 – 27 °C39 – 81 °F4 – 27 °C (39 – 81 °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 frostApril 28

Low-risk last spring frostMay 8

Typical first fall frostOctober 29

Low-risk first fall frostOctober 17

Frost-free days183

Outdoor sow dateApril 14

Direct sow windowApril 14 – June 8

Suitable growing windowApril 14 – October 25 (195 days)

Expected harvestJune 23 – August 27

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 – 27 °C39 – 81 °F4 – 27 °C (39 – 81 °F).
Last frost and first frost: Typical spring and fall frost dates for Ottawa, shown in the key dates.
Days to harvest: 70–80 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 Ottawa

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 Ottawa use ERA5-Land cell 45.41, -75.70. How we calculated this · Algorithm 2026-10-season-10.

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