When should I plant spinach in ZIP 55401?

In ZIP 55401, the main spinach target is around Apr 12, based on the representative Minneapolis frost station and USDA zone 5a.

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 55401 planting calendar

In ZIP 55401, plant spinach around Apr 12.

Your Minneapolis calendar has a 144-day estimated frost-free season. This estimate uses the representative Minneapolis frost station, USDA zone 5a, and spinach timing rules.

USDA zone 5a Minneapolis frost station University of Minnesota Extension Updated 2026-06-28

Read the method

Season map

Spinach windows by month

JanFebMarAprMayJunJulAugSepOctNovDec

Direct sow

Apr 12

Harvest

May 27

Frost watch

Aug 17

Reminder workflow

Every date has a next action

Direct sow spinachApr 12

Last frost windowMay 10

First spinach harvest windowMay 27

Last spinach sowing targetAug 17

Signal	Value	Why it matters
Last frost estimate	May 10, 2026	Warm-season transplant risk starts falling after this window.
First frost estimate	October 1, 2026	Fall planting counts backward from this date.
Season length	144 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

Minneapolis frost history and USDA zone 5a shift the safe planting window. GrowZone uses a local representative station instead of one national rule.

University of Minnesota 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 Oct 1. A conservative last sowing target is around Aug 17.