When should I plant spinach in ZIP 80202?

In ZIP 80202, the main spinach target is around Apr 7, based on the representative Denver frost station and USDA zone 6a.

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 80202 planting calendar

In ZIP 80202, plant spinach around Apr 7.

Your Denver calendar has a 153-day estimated frost-free season. This estimate uses the representative Denver frost station, USDA zone 6a, and spinach timing rules.

USDA zone 6a Denver frost station Colorado State University Extension Updated 2026-06-28

Read the method

Season map

Spinach windows by month

JanFebMarAprMayJunJulAugSepOctNovDec

Direct sow

Apr 7

Harvest

May 22

Frost watch

Aug 21

Reminder workflow

Every date has a next action

Direct sow spinachApr 7

Last frost windowMay 5

First spinach harvest windowMay 22

Last spinach sowing targetAug 21

Signal	Value	Why it matters
Last frost estimate	May 5, 2026	Warm-season transplant risk starts falling after this window.
First frost estimate	October 5, 2026	Fall planting counts backward from this date.
Season length	153 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.

GrowZone may earn from qualifying seed or supply links when real affiliate IDs are configured. No monetized links are active without disclosure.

Local data

Why this date changes by ZIP

Denver frost history and USDA zone 6a shift the safe planting window. GrowZone uses a local representative station instead of one national rule.

Colorado State University 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 5. A conservative last sowing target is around Aug 21.