When should I plant spinach in ZIP 85001?

In ZIP 85001, the main spinach target is around Jan 8, based on the representative Phoenix frost station and USDA zone 10a.

Is this a guaranteed planting date?

No. GrowZone uses frost-date estimates, hardiness zones, and crop timing rules for planning. Local microclimates and current weather can shift the right date.

ZIP 85001 planting calendar

In ZIP 85001, plant spinach around Jan 8.

Your Phoenix calendar has a 313-day estimated frost-free season. This estimate uses the representative Phoenix frost station, USDA zone 10a, and spinach timing rules.

USDA zone 10a Phoenix frost station University of Arizona Extension Updated 2026-06-28

Read the method

Season map

Spinach windows by month

JanFebMarAprMayJunJulAugSepOctNovDec

Direct sow

Jan 8

Harvest

Feb 22

Frost watch

Oct 31

Reminder workflow

Every date has a next action

Direct sow spinachJan 8

Last frost windowFeb 5

First spinach harvest windowFeb 22

Last spinach sowing targetOct 31

Signal	Value	Why it matters
Last frost estimate	February 5, 2026	Warm-season transplant risk starts falling after this window.
First frost estimate	December 15, 2026	Fall planting counts backward from this date.
Season length	313 days	Longer seasons can support succession crops.
Spacing	4-6 in	Airflow and root space affect yield.
Soil temperature	40 F+	Seeds and transplants stall in cold soil.

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Local data

Why this date changes by ZIP

Phoenix frost history and USDA zone 10a shift the safe planting window. GrowZone uses a local representative station instead of one national rule.

University of Arizona Extension is the kind of local source to verify against when a crop is expensive, weather is unusual, or your yard has a cold pocket.

Crop note

Spinach timing notes

Plant early and again in late summer for fall leaves. Spinach prefers sun to part shade, 4-6 in spacing, and soil near 40 F+.

For fall, count backward from Dec 15. A conservative last sowing target is around Oct 31.