When to plant parsley in Detroit

In Detroit, typical last spring frost is April 12 and typical first fall frost is November 8. Typical last spring frost: April 12. Parsley in Detroit is a good fit outdoors. The suitable growing window of 100 days covers the 70–80 days this plant usually needs.

Parsley

How to grow Parsley Detroit climate Weekly temperatures and windows

Where are you growing?

Comfortable

Comfortable in greenhouse

Comfortable in a cold frame

Parsley in Detroit is a good fit outdoors. The suitable growing window of 100 days covers the 70–80 days this plant usually needs.

When to plantMarch 26 – May 20

Harvest: June 4 – August 8
Season vs crop: 100 grow days vs 70–80 needed
Typical frost (last spring – first fall): April 12 – November 8

Parsley in Detroit is a good fit outdoors. The suitable growing window of 100 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 row100

Days to harvest70–80 days from seed

Mar 26 – May 20

Direct sow

May 21 – Jun 3

Grow outdoors

Jun 4 – Aug 8

Harvest

Activity	Window	Notes
Direct sow	Mar 26 – May 20	Plant outdoors in this window.
Grow outdoors	May 21 – Jun 3	Plants grow outdoors until harvest.
Harvest	Jun 4 – Aug 8	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 12

Low-risk last spring frostApril 22

Typical first fall frostNovember 8

Low-risk first fall frostOctober 30

Frost-free days209

Outdoor sow dateMarch 26

Direct sow windowMarch 26 – May 20

Suitable growing windowMarch 26 – July 3 (100 days)

Expected harvestJune 4 – August 8

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 Detroit, 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 Detroit

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 Detroit use ERA5-Land cell 42.33, -83.05. How we calculated this · Algorithm 2026-10-season-10.

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