When to plant watermelons in Omaha: 17 May – 17 July

In Omaha, watermelon: sow for seedlings from 29 March to 19 June; plant into a greenhouse from 26 April to 17 July; plant out into open ground from 17 May to 17 July. For plants and seeds, the places nearby include Exist Green (farm shop, 4 km) and Wenninghoff's (farm shop, 11 km); addresses and opening hours are below.

Watermelon in Omaha: soil, season and weather

In Omaha the soil, not frost, sets the date: the last frost is over around 16 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 17 May, 31 days later.

Last spring frost	16 April
Top 7 cm of soil at 18 °C	17 May, 31 days after the last frost
Into an unheated greenhouse	26 April – 17 July; April outside: 5.5 °C at night, 17.3 °C by day; card 18–35 °C
First autumn frost	26 October, 162 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	15 July – 14 September
Days left for picking	103
Daylight	13:28 on 19 April, 14:33 on 17 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 7 rainy days

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

Watermelon in Omaha: care after planting

Planted on 17 May: in the first weeks water every 5 days.

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

17 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 Omaha during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 30.5 °C. Nights average below 18 °C in May (12.1 °C), September (16.3 °C) and October (8.4 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	22.8	12.1	138	14	14:29
June	29.8	18.8	93	10	15:08
July	30.5	20.5	94	10	14:53
August	29	19.2	99	10	13:52
September	26.6	16.3	74	7	12:31
October	18.5	8.4	75	7	11:09

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Omaha, Topeka is 11 days earlier and Sioux Falls 7 days later.

City	Distance	Date	Difference
Lincoln	79 km	11 May – 19 July	6 days earlier
Des Moines	198 km	17 May – 18 July	same day
Grand Island	206 km	18 May – 18 July	1 day later
Topeka	249 km	6 May – 20 July	11 days earlier
Sioux Falls	262 km	24 May – 12 July	7 days later
Kansas City	267 km	7 May – 23 July	10 days earlier

Where to buy watermelon plants and seeds near Omaha

Buy plants ready to set out from 17 May to 17 July (from 26 April to 17 July for an unheated greenhouse); seed for raising your own is sown from 29 March to 19 June. Within 15 km of Omaha OpenStreetMap lists 8 garden centres, 1 plant nursery, 5 markets and 2 farm shops (collected 20 October 2026).

Exist Green — farm shop
Underwood Avenue 4914, 68132-2414 Omaha · Tue–Fri 11:00–19:00; Sat 10:00–18:00 · 4 km · existgreen.com
Wenninghoff's — farm shop
Wenninghoff Road 6707, 68122 Omaha · Mon–Fri 09:00–19:00; Sat 09:00–17:00; Sun 10:00–17:00 · 11 km · linktr.ee
Hy-Vee Garden Center — garden centre
10 km
Moore's Landscaping & Nursery — garden centre
14 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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