When to plant potato 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. Potato in Phoenix is doable with planning outdoors. 85 suitable days are enough for fast varieties (70 days) but not slow ones (125 days).

Potato

How to grow Potato Phoenix climate Weekly temperatures and windows

Where are you growing?

Tight fit

Tight fit in greenhouse

Tight fit in a cold frame

Potato in Phoenix is doable with planning outdoors. 85 suitable days are enough for fast varieties (70 days) but not slow ones (125 days).

When to plantJanuary 25 – April 3

Harvest: April 5 – September 5
Season vs crop: 85 grow days vs 70–125 needed
Typical frost (last spring – first fall): January 17 – December 22

Potato in Phoenix is doable with planning outdoors. 85 suitable days are enough for fast varieties (70 days) but not slow ones (125 days).

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 row85

Days to harvest70–125 days from planting

Jan 25 – Apr 3

Direct sow

April 4

Grow outdoors

Apr 5 – Sep 5

Harvest

Activity	Window	Notes
Direct sow	Jan 25 – Apr 3	Plant outdoors in this window.
Grow outdoors	April 4	Plants grow outdoors until harvest.
Harvest	Apr 5 – Sep 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 – 24 °C59 – 75 °F15 – 24 °C (59 – 75 °F)) and tolerable (7 – 30 °C45 – 86 °F7 – 30 °C (45 – 86 °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 frostJanuary 17

Low-risk last spring frostFebruary 22

Typical first fall frostDecember 22

Low-risk first fall frostNovember 30

Frost-free days338

Outdoor sow dateJanuary 25

Direct sow windowJanuary 25 – April 3

Suitable growing windowJanuary 25 – April 19 (85 days)

Expected harvestApril 5 – September 5

How these dates are judged

Ideal conditions: Daytime air from 15 – 24 °C59 – 75 °F15 – 24 °C (59 – 75 °F).
Suitable conditions: Daytime air from 7 – 30 °C45 – 86 °F7 – 30 °C (45 – 86 °F).
Last frost and first frost: Typical spring and fall frost dates for Phoenix, shown in the key dates.
Days to harvest: 70–125 days from planting, 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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