When should I plant cilantro in ZIP 53202?

In ZIP 53202, the main cilantro target is around Apr 26, based on the representative Milwaukee frost station and USDA zone 6a.

When should I start cilantro seeds indoors in 53202?

Cilantro is usually direct-sown for ZIP 53202. Use the Apr 26 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 53202 planting calendar

When to plant cilantro in Milwaukee, WI - Zone 6a

Q: When is the first frost in Milwaukee?

Milwaukee (ZIP 53202) has an average first fall frost around Oct 10, leaving about 153 frost-free days.

In ZIP 53202, plant cilantro around Apr 26; this uses the Milwaukee frost station, USDA zone 6a, and cilantro timing rules.

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

Source: milwaukee-mitchell frost station, USDA zone 6a, last updated 2026-06-28. Verify locally before planting high-value crops because microclimates, current weather, and yard exposure can move the safe date.

Reviewed by GrowZone Editorial. Calculated from the milwaukee-mitchell frost station and USDA zone 6a, last updated 2026-06-28.

In the Milwaukee area, cilantro timing follows the Milwaukee frost window, so the local ZIP date can differ from a broad zone-only calendar.

USDA zone 6a Milwaukee frost station University of Wisconsin Extension Updated 2026-06-28

Read the method

Answer first

When to start cilantro seeds indoors in Milwaukee

In ZIP 53202, cilantro is usually direct-sown around Apr 26 instead of started indoors.

Cilantro is normally direct-sown in Milwaukee. Use around Apr 26 as the outdoor planting window for ZIP 53202.

Seed starting schedule

Cilantro dates for Milwaukee, WI

Step	Date	How to use it
Direct Sow	April 26, 2026	Sow seed outside when the crop and soil can handle the window.

Last frost

When is the last frost in Milwaukee?

Milwaukee (ZIP 53202) has an average last spring frost around May 10.

First frost

When is the first frost in Milwaukee?

The average first fall frost is around Oct 10, giving about 153 frost-free days.

Season map

Cilantro windows by month

JanFebMarAprMayJunJulAugSepOctNovDec

Direct sow

Apr 26

Harvest

Jun 10

Frost watch

Aug 26

Reminder workflow

Every date has a next action

Direct sow cilantroApr 26

Last frost windowMay 10

First cilantro harvest windowJun 10

Last cilantro sowing targetAug 26

Signal	Value	Why it matters
Last frost estimate	May 10, 2026	Warm-season transplant risk starts falling after this window.
First frost estimate	October 10, 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	45 F+	Seeds and transplants stall in cold soil.

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Local data

Why this date changes by ZIP

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

University of Wisconsin 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

Cilantro timing notes

Sow small batches often because cilantro bolts in heat. Cilantro prefers sun to part shade, 4-6 in spacing, and soil near 45 F+.

For fall, count backward from Oct 10. A conservative last sowing target is around Aug 26.