Greenly Garden
Get the app
EN

Last and first frost dates in Tulsa

United States

In Tulsa the last spring frost usually comes around 6 March and the first autumn frost around 17 November, which leaves about 256 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 6 April to 28 July.

Last spring frostaround 6 March
First autumn frostaround 17 November
Frost-free days256 days
Hardiness zone (USDA-equivalent)official USDA map: 7b

Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.

When is the last frost in Tulsa?

The last frost in Tulsa usually comes around 6 March: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 13 February, while corn waits until 14 March. The first autumn frost follows around 17 November, about 256 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha11 January – 9 August20 February – 18 September13 March – 18 September
Ageratumfrom 19 January—from 6 April
Arugula——sow 13 February – 13 October
Basil1 March – 15 September8 April – 23 October29 April – 23 October
Beet——sow 13 February – 18 September
Bell Pepper7 February – 29 May8 April – 28 July29 April – 28 July
Black-eyed Susanfrom 20 December—from 13 March
Bok Choy16 January – 26 September20 February – 31 October13 March – 31 October
Borage——sow 13 March – 23 September
Broad bean——sow 13 February – 9 August
Broccoli——sow 13 February – 2 August
Brussels Sprouts9 December – 30 June23 January – 14 August13 February – 14 August
Busy Lizziefrom 19 December—from 13 March
Cabbage——sow 13 February – 10 July
Calendula——sow from 13 February
Carrot——sow 13 February – 25 August
Cauliflower12 December – 2 August23 January – 13 September13 February – 13 September
Celeriac5 December – 30 May20 February – 15 August13 March – 15 August
Celery5 December – 9 June20 February – 25 August13 March – 25 August
Celosiafrom 3 Februaryfrom 20 Marchfrom 10 April
Chamomile——sow 13 February – 13 September
Chayote25 November – 23 May21 February – 19 August14 March – 19 August
Chickpea——sow 13 February – 30 July
Chicory29 December – 24 August—13 February – 18 September
Chili Pepper7 February – 5 July8 April – 3 September29 April – 3 September
China asterfrom 15 Februaryfrom 8 Aprilfrom 29 April
Chives——sow 13 February – 4 September
Cilantro——sow 13 February – 14 September
Corn——sow 14 March – 30 July
Corn poppy——sow from 13 February
Cosmosfrom 3 Februaryfrom 20 Marchfrom 10 April
Cucumber11 March – 5 August8 April – 2 September29 April – 2 September
Daikon——sow 13 February – 11 September
Delphiniumfrom 25 November—from 13 February
Dill——sow 13 February – 24 September
Edging lobeliafrom 19 December—from 13 March
Eggplant7 February – 29 May8 April – 28 July29 April – 28 July
Florence fennel6 January – 9 August20 February – 23 September13 March – 23 September
Foxglovefrom 7 November—from 13 February
Garden sorrel——sow 13 February – 12 September
Green Beans——sow 10 April – 7 August
Hollyhock——sow from 13 February
Hyssop——sow 13 February – 5 August
Kale——sow 13 February – 6 September
Kiwano12 February – 12 August16 March – 13 September6 April – 13 September
Kohlrabi——sow 13 February – 16 September
Leek14 November – 21 May23 January – 30 July13 February – 30 July
Lemon balm——sow 13 February – 8 September
Lettuce——sow 13 February – 21 September
Lisianthusfrom 28 Octoberfrom 23 Januaryfrom 13 February
Lovage——sow from 13 February
Luffa25 February – 6 June8 April – 18 July29 April – 18 July
Marigoldfrom 9 Januaryfrom 20 Februaryfrom 13 March
Marjoram7 February – 24 August—29 April – 23 October
Melon11 March – 23 July8 April – 20 August29 April – 20 August
Microgreens——sow 10 April – 3 November
Moringa25 February – 29 August21 April – 23 October12 May – 23 October
Moss rosefrom 26 December—from 13 March
Mustard greens——sow 13 February – 3 October
Napa cabbage18 January – 3 September20 February – 6 October13 March – 6 October
Nasturtiumfrom 13 Januaryfrom 20 Februaryfrom 13 March
Okra25 February – 17 August8 April – 28 September29 April – 28 September
Oregano24 November – 14 August23 January – 13 October13 February – 13 October
Pansyfrom 28 Novemberfrom 23 Januaryfrom 13 February
Parsley——sow 13 February – 2 September
Parsnip——sow 13 February – 22 July
Peanut2 March – 13 July8 April – 19 August29 April – 19 August
Peas——sow 13 February – 4 September
Petuniafrom 4 Februaryfrom 8 Aprilfrom 29 April
Physalis30 January – 10 July16 March – 24 August6 April – 24 August
Pumpkin25 February – 11 June8 April – 23 July29 April – 23 July
Purple coneflowerfrom 22 November—from 13 February
Radish——sow 13 February – 18 October
Sage5 December – 10 August23 January – 28 September13 February – 28 September
Scarlet sagefrom 23 January—from 6 April
Snapdragonfrom 19 Novemberfrom 23 Januaryfrom 13 February
Soybean——sow 29 April – 29 August
Spinach——sow 13 February – 23 September
Stevia26 January – 1 July16 March – 19 August6 April – 19 August
Stock——sow from 13 February
Sunflower——sow from 10 April
Sweet alyssum——sow from 13 February
Sweet Corn6 February – 24 August28 February – 15 September21 March – 15 September
Sweet peafrom 12 Decemberfrom 23 Januaryfrom 13 February
Sweet William——sow from 13 February
Swiss Chard——sow 13 February – 18 September
Thyme——sow 13 February – 30 July
Tomato23 January – 6 June16 March – 28 July6 April – 28 July
Turnip——sow 13 February – 20 September
Watercress——sow 13 February – 1 October
Watermelon11 March – 11 July8 April – 8 August29 April – 8 August
Zinniafrom 17 Marchfrom 21 Aprilfrom 12 May
Zucchini18 March – 10 August8 April – 31 August29 April – 31 August

Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day. Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

What planting zone is Tulsa?

The official USDA map (2023, 1991–2020 data) puts the centre of Tulsa (ZIP 74119) in zone 7b. Zone 7b stands for an average coldest night of 5 to 10 °F (-15 to -12.2 °C), so perennials hardy to zone 7b or a colder zone should come through a typical winter here.

Check the official USDA map for Tulsa: USDA Plant Hardiness Zone Map.

When the soil warms up in Tulsa

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 1 day before the last spring frost and 15 °C 31 days after it.

SoilDateAgainst the last spring frost
5 °C25 January40 days earlier
10 °C5 March1 day earlier
15 °C6 April31 days later
18 °C29 April54 days later

Frost dates near Tulsa

Of the nearest cities on our list, the last spring frost ends earliest in Oklahoma City (14 March) and latest in Wichita (3 April).

CityDistanceLast spring frostFirst autumn frost
Oklahoma City157 km14 March10 November
Fayetteville165 km30 March10 November
Joplin168 km30 March1 November
Fort Smith169 km16 March18 November
Wichita209 km3 April30 October

Seeds, seedlings and markets in Tulsa

Within 15 km of Tulsa OpenStreetMap lists 8 garden centres, 2 farm-supply shops, 1 plant nursery, 1 market and 1 farm shop (collected 20 October 2026). The nearest garden centre to the city centre is Garden Deva, 2 km away.

Places: © OpenStreetMap contributors, ODbL.

What to grow at home in winter in Tulsa

Frosts in Tulsa usually come from about 17 November to about 6 March. These plants have indoor care in their Greenly cards and are harvested quickly, so they can be sown on a windowsill in winter.

Weather in Tulsa by month

Average weather in Tulsa over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: April–October (21.9–33.6 °C). Months that average 30 °C or more by day: June (31.8 °C), July (33.6 °C) and August (32.6 °C). Nights average below 0 °C in January (-0.9 °C). About 1153 mm of rain falls in a year, on 103 days; May is the wettest month (164 mm) and December the driest (42 mm).

MonthDay, °CNight, °CRain, mmRainy days
January8.7-0.9556
February12.21547
March18.57959
April21.910.715511
May26.11616414
June31.821.51089
July33.623.69810
August32.622.810810
September29.919.7947
October23.413.11078
November16.46.6737
December11.82.3425

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).

Planted in autumn

CropWhen to plant
Bearded Irisby 18 October
Crocusby 18 October
Daffodilby 18 October
Garlic18 October – end of December
Grape hyacinthby 18 October
Helleboreby 18 October
Hyacinthby 18 October
Lilyby 18 October
Ornamental onionby 18 October
Peonyby 18 October
Saffronby 18 October
Snowdropby 18 October
Tulipby 18 October
Wild garlicby 18 October

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).