When should I plant spinach in ZIP 93301?

In ZIP 93301, the main spinach target is around Jan 23, based on the representative Bakersfield frost station and USDA zone 9b.

When should I start spinach seeds indoors in 93301?

Spinach is usually direct-sown for ZIP 93301. Use the Jan 23 planting window instead of starting it indoors.

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 93301 planting calendar

When to plant spinach in Bakersfield, CA - Zone 9b

Q: When is the first frost in Bakersfield?

Bakersfield (ZIP 93301) has an average first fall frost around Nov 25, leaving about 278 frost-free days.

In ZIP 93301, plant spinach around Jan 23; this uses the Bakersfield frost station, USDA zone 9b, and spinach timing rules.

Your Bakersfield calendar has a 278-day estimated frost-free season. This estimate uses the representative Bakersfield frost station, USDA zone 9b, and spinach timing rules.

Source: bakersfield-meadows frost station, USDA zone 9b, last updated 2026-06-28. Verify locally before planting high-value crops because microclimates, current weather, and yard exposure can move the safe date.

USDA zone 9b Bakersfield frost station University of California Agriculture and Natural Resources Updated 2026-06-28

Read the method

Answer first

When to start spinach seeds indoors in Bakersfield

In ZIP 93301, spinach is usually direct-sown around Jan 23 instead of started indoors.

Spinach is normally direct-sown in Bakersfield. Use around Jan 23 as the outdoor planting window for ZIP 93301.

Seed starting schedule

Spinach dates for Bakersfield, CA

Step	Date	How to use it
Direct Sow	January 23, 2026	Sow seed outside when the crop and soil can handle the window.

Last frost

When is the last frost in Bakersfield?

Bakersfield (ZIP 93301) has an average last spring frost around Feb 20.

First frost

When is the first frost in Bakersfield?

The average first fall frost is around Nov 25, giving about 278 frost-free days.

Season map

Spinach windows by month

JanFebMarAprMayJunJulAugSepOctNovDec

Direct sow

Jan 23

Harvest

Mar 9

Frost watch

Oct 11

Reminder workflow

Every date has a next action

Direct sow spinachJan 23

Last frost windowFeb 20

First spinach harvest windowMar 9

Last spinach sowing targetOct 11

Signal	Value	Why it matters
Last frost estimate	February 20, 2026	Warm-season transplant risk starts falling after this window.
First frost estimate	November 25, 2026	Fall planting counts backward from this date.
Season length	278 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

Bakersfield frost history and USDA zone 9b shift the safe planting window. GrowZone uses a local representative station instead of one national rule.

University of California Agriculture and Natural Resources 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 Nov 25. A conservative last sowing target is around Oct 11.