Frost Dates for Tulsa, OK 74133

Last spring frost April 2 · First fall frost October 28 · 209 frost-free days · USDA Zone 7b

Frost probability for 74133

Frost10%50%90%
Spring (last frost)April 16April 2March 19
Fall (first frost)October 13October 28November 12

Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (6.4 km away); the 50% date is the median year.

Frost dates by ZIP code in Tulsa, OK

ZIPLast spring frost (50%)First fall frost (50%)Zone
74133April 2October 287b
74136April 2October 287b
74137April 2October 267b
74105April 2October 287b
74115April 2October 287b
74134April 2October 287b
74112April 2October 287b
74135April 2October 287b
74107April 2October 267b
74129April 2October 287b
74145April 2October 287b
74146April 2October 287b
74127April 2October 267b
74114April 2October 287b
74106April 2October 267b
74110April 2October 287b
74128April 2October 287b
74104April 2October 287b
74132April 2October 267b
74126April 2October 267b
74108April 2October 287b
74120April 2October 287b
74119April 2October 287b
74116April 2October 287b
74103April 2October 267b
74131April 2October 267b
74130April 2October 287b
74171April 2October 267b
74117April 2October 287b

Month by month in Tulsa

MonthWhat to do
JanuaryPlan your garden layout and order seeds. Research varieties suited to your frost dates.
FebruaryStart peppers and eggplant indoors 8–10 weeks before your last frost (around April 2). Start tomatoes about two weeks later, 6–8 weeks before last frost.
MarchStart herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable.
AprilLast frost around April 2. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings.
MayFrost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini.
JuneSuccession plant lettuce and greens. Keep beds weeded and watered consistently.
JulyHarvest regularly to encourage production. Monitor for pests and disease.
AugustMidsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall.
SeptemberFirst fall frost approaching (around October 28). Transplant fall brassicas. Sow spinach, arugula, and radishes.
OctoberFirst frost around October 28. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season.
NovemberHarvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year.
DecemberClean up spent plants. Add compost to beds. Rest, review, and plan next year's garden.

What grows in a 209-day season

Frequently Asked Questions

What is the last frost date for Tulsa, OK (ZIP 74133)?

The median last spring frost date for Tulsa, OK (ZIP code 74133) is around April 2. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.

What is the first fall frost date in Tulsa, OK?

The median first fall frost date for Tulsa, OK is around October 28. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.

How long is the growing season in Tulsa, OK?

The frost-free growing season in Tulsa is about 209 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.

What USDA hardiness zone is Tulsa, OK?

Based on frost date patterns, Tulsa falls approximately in 7b. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.

When should I start tomatoes indoors in Tulsa, OK?

Start tomato seeds indoors 6–8 weeks before your last frost date (around April 2). For Tulsa, that's roughly February 6 to February 20. Transplant outdoors 1–2 weeks after your last frost.

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