When to plant tomatoes in Tulsa: 6 April – 28 July

In Tulsa, tomato: sow for seedlings from 23 January to 6 June; plant into a greenhouse from 16 March to 28 July; plant out into open ground from 6 April to 28 July. For plants and seeds, the places nearby include Garden Deva (garden centre, 2 km) and Grumpy's Garden (garden centre, 2 km); addresses and opening hours are below.

Tomato in Tulsa: soil, season and weather

In Tulsa the soil, not frost, sets the date: the last frost is over around 6 March, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 6 April, 31 days later.

Last spring frost	6 March
Top 7 cm of soil at 15 °C	6 April, 31 days after the last frost
Into an unheated greenhouse	16 March – 28 July; March outside: 7 °C at night, 18.5 °C by day; card 16–27 °C
First autumn frost	17 November, 225 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	15 June – 6 October
Days left for picking	155
Daylight	10:48 on 13 February, 12:46 on 6 April
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 7 rainy days

Tomato in Tulsa: care after planting

Planted on 6 April: in the first weeks water every 4 days.

Feeding, by the card’s schedule from that day:

6 April — feed: balanced (NPK)
4 May — feed: nitrogen

Pests and diseases of tomato to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Weather in Tulsa during the tomato season

Days average above the tomato card's 16–27 °C in June–September (29.9–33.6 °C). Nights average below 16 °C in April (10.7 °C), October (13.1 °C) and November (6.6 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
April	21.9	10.7	155	11	13:06
May	26.1	16	164	14	14:04
June	31.8	21.5	108	9	14:36
July	33.6	23.6	98	10	14:24
August	32.6	22.8	108	10	13:34
September	29.9	19.7	94	7	12:27
October	23.4	13.1	107	8	11:19
November	16.4	6.6	73	7	10:16

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Tulsa, Lawton is 24 days earlier and Wichita 7 days later.

City	Distance	Date	Difference
Oklahoma City	157 km	23 March – 21 July	14 days earlier
Fayetteville	165 km	10 April – 21 July	4 days later
Joplin	168 km	11 April – 12 July	5 days later
Fort Smith	169 km	5 April – 29 July	1 day earlier
Wichita	209 km	13 April – 10 July	7 days later
Lawton	278 km	13 March – 22 July	24 days earlier

Where to buy tomato plants and seeds near Tulsa

Buy plants ready to set out from 6 April to 28 July (from 16 March to 28 July for an unheated greenhouse); seed for raising your own is sown from 23 January to 6 June. 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).

Garden Deva — garden centre
East 3rd Street South 1326, 74120 Tulsa · 2 km · gardendeva.com
Southwood Home & Garden — garden centre
South Lewis Avenue East 1102, 74104 Tulsa · Wed–Sun 10:00–18:00 · 3 km
Grumpy's Garden — garden centre
East 15th Street South 1140, 74120 Tulsa · 2 km
Under the Sun Garden Center — garden centre
South Sheridan Road East 8998, 74133 Tulsa · 15 km

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.

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