When to plant parsley in Phoenix

In Phoenix, typical last spring frost is January 17 and typical first fall frost is December 22. Typical last spring frost: January 17. Parsley in Phoenix is not realistic outdoors: 69 suitable days are fewer than the 70 days this plant usually needs.

Parsley

How to grow Parsley Phoenix climate Weekly temperatures and windows

Where are you growing?

Not realistic outdoors

Not realistic in greenhouse

Comfortable in a cold frame

Parsley in Phoenix is a good fit under fleece. The suitable growing window of 92 days covers the 70–80 days this plant usually needs.

When to plantJanuary 2 – February 26

Harvest: March 13 – May 17
Season vs crop: 92 grow days vs 70–80 needed
Typical frost (last spring – first fall): January 3 – December 30

Parsley in Phoenix is a good fit under fleece. The suitable growing window of 92 days covers the 70–80 days this plant usually needs.

Estimate. Protection varies with the cover, the weather and how you vent it.

Fleece adds about 1–4 °C on frosty nights, depending on its weight. Remove it on warm days.

Fleece also cuts light: about 5–10 % for light fleece, up to 50–70 % for heavy grades. Take it off by day once frosts are over.

Cover dates are modelled from weather-model data using published greenhouse studies. They are not measured in your greenhouse. A max–min thermometer inside will tell you more.

Planting conditions

Direct sow
Grow outdoors
Harvest

Local activity windows for this place and growing method. Dashed lines are typical last and first frost.

Suitable growing days in a row92

Days to harvest70–80 days from seed

Jan 2 – Feb 26

Direct sow

Feb 27 – Mar 12

Grow outdoors

Mar 13 – May 17

Harvest

Activity	Window	Notes
Direct sow	Jan 2 – Feb 26	Plant outdoors in this window.
Grow outdoors	Feb 27 – Mar 12	Plants grow outdoors until harvest.
Harvest	Mar 13 – May 17	Expected harvest from typical days to harvest.

Direct sow
Grow outdoors
Harvest

Based on average frost dates (35 seasons (1991–2025)). Adjust a week or two for your conditions.

Protected frost and sowing dates are modelled estimates from weather-model data and published greenhouse studies, not measured in your greenhouse. A max–min thermometer inside will tell you more.

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, from modelled cover temperatures for the growing method you selected.

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 frostJanuary 3

Low-risk last spring frostJanuary 30

Typical first fall frostDecember 30

Low-risk first fall frostDecember 26

Frost-free days360

Outdoor sow dateJanuary 2

Direct sow windowJanuary 2 – February 26

Suitable growing windowJanuary 2 – April 3 (92 days)

Expected harvestMarch 13 – May 17

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 Phoenix, 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 Phoenix

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 Phoenix use ERA5-Land cell 33.45, -112.07. How we calculated this · Algorithm 2026-10-season-10.

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