When should I plant carrots in ZIP 95113?

In ZIP 95113, the main carrots target is around Jan 25, based on the representative San Jose frost station and USDA zone 9b.

When should I start carrots seeds indoors in 95113?

Carrots is usually direct-sown for ZIP 95113. Use the Jan 25 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 95113 planting calendar

When to plant carrots in San Jose, CA - Zone 9b

Q: When is the first frost in San Jose?

San Jose (ZIP 95113) has an average first fall frost around Dec 1, leaving about 289 frost-free days.

In ZIP 95113, plant carrots around Jan 25; this uses the San Jose frost station, USDA zone 9b, and carrots timing rules.

Your San Jose calendar has a 289-day estimated frost-free season. This estimate uses the representative San Jose frost station, USDA zone 9b, and carrots timing rules.

Source: san-jose-mineta 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 San Jose frost station University of California Agriculture and Natural Resources Updated 2026-06-28

Read the method

Answer first

When to start carrots seeds indoors in San Jose

In ZIP 95113, carrots is usually direct-sown around Jan 25 instead of started indoors.

Carrots is normally direct-sown in San Jose. Use around Jan 25 as the outdoor planting window for ZIP 95113.

Seed starting schedule

Carrots dates for San Jose, CA

Step	Date	How to use it
Direct Sow	January 25, 2026	Sow seed outside when the crop and soil can handle the window.

Last frost

When is the last frost in San Jose?

San Jose (ZIP 95113) has an average last spring frost around Feb 15.

First frost

When is the first frost in San Jose?

The average first fall frost is around Dec 1, giving about 289 frost-free days.

Season map

Carrots windows by month

JanFebMarAprMayJunJulAugSepOctNovDec

Direct sow

Jan 25

Harvest

Apr 5

Frost watch

Sep 22

Reminder workflow

Every date has a next action

Direct sow carrotsJan 25

Last frost windowFeb 15

First carrots harvest windowApr 5

Last carrots sowing targetSep 22

Signal	Value	Why it matters
Last frost estimate	February 15, 2026	Warm-season transplant risk starts falling after this window.
First frost estimate	December 1, 2026	Fall planting counts backward from this date.
Season length	289 days	Longer seasons can support succession crops.
Spacing	2-3 in	Airflow and root space affect yield.
Soil temperature	45 F+	Seeds and transplants stall in cold soil.

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Local data

Why this date changes by ZIP

San Jose 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

Carrots timing notes

Direct sow only; carrots dislike transplanting. Carrots prefers full sun, 2-3 in spacing, and soil near 45 F+.

For fall, count backward from Dec 1. A conservative last sowing target is around Sep 22.