When should I plant carrots in ZIP 48226?

In ZIP 48226, the main carrots target is around Apr 14, based on the representative Detroit frost station and USDA zone 6b.

When should I start carrots seeds indoors in 48226?

Carrots is usually direct-sown for ZIP 48226. Use the Apr 14 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 48226 planting calendar

When to plant carrots in Detroit, MI - Zone 6b

Q: When is the first frost in Detroit?

Detroit (ZIP 48226) has an average first fall frost around Oct 15, leaving about 163 frost-free days.

In ZIP 48226, plant carrots around Apr 14; this uses the Detroit frost station, USDA zone 6b, and carrots timing rules.

Your Detroit calendar has a 163-day estimated frost-free season. This estimate uses the representative Detroit frost station, USDA zone 6b, and carrots timing rules.

Source: detroit-metro frost station, USDA zone 6b, 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 6b Detroit frost station Michigan State University Extension Updated 2026-06-28

Read the method

Answer first

When to start carrots seeds indoors in Detroit

In ZIP 48226, carrots is usually direct-sown around Apr 14 instead of started indoors.

Carrots is normally direct-sown in Detroit. Use around Apr 14 as the outdoor planting window for ZIP 48226.

Seed starting schedule

Carrots dates for Detroit, MI

Step	Date	How to use it
Direct Sow	April 14, 2026	Sow seed outside when the crop and soil can handle the window.

Last frost

When is the last frost in Detroit?

Detroit (ZIP 48226) has an average last spring frost around May 5.

First frost

When is the first frost in Detroit?

The average first fall frost is around Oct 15, giving about 163 frost-free days.

Season map

Carrots windows by month

JanFebMarAprMayJunJulAugSepOctNovDec

Direct sow

Apr 14

Harvest

Jun 23

Frost watch

Aug 6

Reminder workflow

Every date has a next action

Direct sow carrotsApr 14

Last frost windowMay 5

First carrots harvest windowJun 23

Last carrots sowing targetAug 6

Signal	Value	Why it matters
Last frost estimate	May 5, 2026	Warm-season transplant risk starts falling after this window.
First frost estimate	October 15, 2026	Fall planting counts backward from this date.
Season length	163 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

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

Michigan 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

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 Oct 15. A conservative last sowing target is around Aug 6.