When should I plant cilantro in ZIP 74103?

In ZIP 74103, the main cilantro target is around Mar 22, based on the representative Tulsa frost station and USDA zone 7b.

When should I start cilantro seeds indoors in 74103?

Cilantro is usually direct-sown for ZIP 74103. Use the Mar 22 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 74103 planting calendar

When to plant cilantro in Tulsa, OK - Zone 7b

Q: When is the first frost in Tulsa?

Tulsa (ZIP 74103) has an average first fall frost around Oct 30, leaving about 208 frost-free days.

In ZIP 74103, plant cilantro around Mar 22; this uses the Tulsa frost station, USDA zone 7b, and cilantro timing rules.

Your Tulsa calendar has a 208-day estimated frost-free season. This estimate uses the representative Tulsa frost station, USDA zone 7b, and cilantro timing rules.

Source: tulsa-intl frost station, USDA zone 7b, 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 7b Tulsa frost station Oklahoma State University Extension Updated 2026-06-28

Read the method

Answer first

When to start cilantro seeds indoors in Tulsa

In ZIP 74103, cilantro is usually direct-sown around Mar 22 instead of started indoors.

Cilantro is normally direct-sown in Tulsa. Use around Mar 22 as the outdoor planting window for ZIP 74103.

Seed starting schedule

Cilantro dates for Tulsa, OK

Step	Date	How to use it
Direct Sow	March 22, 2026	Sow seed outside when the crop and soil can handle the window.

Last frost

When is the last frost in Tulsa?

Tulsa (ZIP 74103) has an average last spring frost around Apr 5.

First frost

When is the first frost in Tulsa?

The average first fall frost is around Oct 30, giving about 208 frost-free days.

Season map

Cilantro windows by month

JanFebMarAprMayJunJulAugSepOctNovDec

Direct sow

Mar 22

Harvest

May 6

Frost watch

Sep 15

Reminder workflow

Every date has a next action

Direct sow cilantroMar 22

Last frost windowApr 5

First cilantro harvest windowMay 6

Last cilantro sowing targetSep 15

Signal	Value	Why it matters
Last frost estimate	April 5, 2026	Warm-season transplant risk starts falling after this window.
First frost estimate	October 30, 2026	Fall planting counts backward from this date.
Season length	208 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

Tulsa frost history and USDA zone 7b shift the safe planting window. GrowZone uses a local representative station instead of one national rule.

Oklahoma 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

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 30. A conservative last sowing target is around Sep 15.