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ZIP 74103 planting calendar

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

In ZIP 74103, plant cucumbers around Apr 15; this uses the Tulsa frost station, USDA zone 7b, and cucumbers 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 cucumbers 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.

Reviewed by GrowZone Editorial. Calculated from the tulsa-intl frost station and USDA zone 7b, last updated 2026-06-28.

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

USDA zone 7b Tulsa frost station Oklahoma State University Extension Updated 2026-06-28
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Answer first

When to start cucumbers seeds indoors in Tulsa

In ZIP 74103, start cucumbers seeds indoors around Mar 15, about 21 days before the Apr 5 last-frost estimate.

Start cucumbers seeds indoors in Tulsa around Mar 15, about 21 days before the Apr 5 last-frost estimate.

Seed starting schedule

Cucumbers dates for Tulsa, OK

StepDateHow to use it
Start IndoorsMarch 15, 2026Start seeds under lights or in a bright indoor seed-starting space.
Transplant OutdoorsApril 15, 2026Move hardened-off seedlings outside after the frost-risk window.
Direct SowApril 15, 2026Sow 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

Cucumbers windows by month

JanFebMarAprMayJunJulAugSepOctNovDec
Start indoors
Mar 15
Direct sow
Apr 15
Transplant
Apr 15
Harvest
Jun 14
Frost watch
Aug 31

Reminder workflow

Every date has a next action

Start cucumbers indoorsMar 15
Last frost windowApr 5
Direct sow cucumbersApr 15
Transplant cucumbersApr 15
First cucumbers harvest windowJun 14
Last cucumbers sowing targetAug 31
SignalValueWhy it matters
Last frost estimateApril 5, 2026Warm-season transplant risk starts falling after this window.
First frost estimateOctober 30, 2026Fall planting counts backward from this date.
Season length208 daysLonger seasons can support succession crops.
Spacing12-18 inAirflow and root space affect yield.
Soil temperature65 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

Cucumbers timing notes

Use a trellis if space is tight and keep soil evenly moist. Cucumbers prefers full sun, 12-18 in spacing, and soil near 65 F+.

For fall, count backward from Oct 30. A conservative last sowing target is around Aug 31.