When to plant watermelons in Fayetteville: 9 May – 1 August

In Fayetteville, watermelon: sow for seedlings from 21 March to 4 July; plant into a greenhouse from 18 April to 1 August; plant out into open ground from 9 May to 1 August. For plants and seeds, the places nearby include Garden IQ Organics (garden centre, 8 km) and Bomgaars (farm supply, 14 km); addresses and opening hours are below.

Watermelon in Fayetteville: soil, season and weather

In Fayetteville the soil, not frost, sets the date: the last frost is over around 30 March, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 9 May, 40 days later.

Last spring frost	30 March
Top 7 cm of soil at 18 °C	9 May, 40 days after the last frost
Into an unheated greenhouse	18 April – 1 August; April outside: 9.6 °C at night, 20.2 °C by day; card 18–35 °C
First autumn frost	10 November, 185 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	7 July – 29 September
Days left for picking	126
Daylight	12:57 on 11 April, 13:54 on 9 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 7 rainy days

The same dates in Fayetteville hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Fayetteville: care after planting

Planted on 9 May: in the first weeks water every 5 days.

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

9 May — feed: balanced (NPK)

Pests and diseases of watermelon 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 Fayetteville during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 31.7 °C. Months that stay below 18 °C even by day on average: November (15.5 °C). Nights average below 18 °C in May (14.6 °C), October (12.2 °C) and November (5.8 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	24.4	14.6	147	14	14:04
June	29.8	19.6	88	11	14:36
July	31.7	21.8	91	11	14:23
August	30.7	21	104	12	13:33
September	28.5	18.1	64	7	12:27
October	22.2	12.2	106	9	11:19
November	15.5	5.8	64	8	10:17

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Fayetteville, Oklahoma City is 24 days earlier and Jefferson City 2 days later.

City	Distance	Date	Difference
Fort Smith	78 km	1 May – 9 August	8 days earlier
Joplin	118 km	5 May – 23 July	4 days earlier
Tulsa	165 km	29 April – 8 August	10 days earlier
Little Rock	223 km	22 April – 11 August	17 days earlier
Oklahoma City	310 km	15 April – 1 August	24 days earlier
Jefferson City	329 km	11 May – 26 July	2 days later

Where to buy watermelon plants and seeds near Fayetteville

Buy plants ready to set out from 9 May to 1 August (from 18 April to 1 August for an unheated greenhouse); seed for raising your own is sown from 21 March to 4 July. Within 15 km of Fayetteville OpenStreetMap lists 5 garden centres, 1 farm-supply shop and 1 market (collected 28 October 2026).

Garden IQ Organics — garden centre
Main Drive 3133, 72704 Fayetteville · 8 km · gardeniq.com
Bomgaars — farm supply
North Maestri Road 211, 72762 Springdale · 14 km · bomgaars.com
Hippie Hollow Refill — market
North College Avenue 3019, 72703 Fayetteville · Tue–Sat 10:00–17:00; Sun 12:00–17:00 · 5 km
Sharum's — garden centre
13 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.

Questions