When to plant cucumbers in Omaha: 17 May – 11 August

In Omaha, cucumber: sow for seedlings from 29 March to 14 July; plant into a greenhouse from 26 April to 11 August; plant out into open ground from 17 May to 11 August.

Cucumber 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 cucumber 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 – 11 August; April outside: 5.5 °C at night, 17.3 °C by day; card 18–25 °C
First autumn frost	26 October, 162 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	20 June – 14 September
Days left for picking	128
Daylight	13:28 on 19 April, 14:33 on 17 May
Watering outdoors when fruiting (card)	every 2 days; the driest month, September, has 7 rainy days

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

Cucumber in Omaha: care after planting

Planted on 17 May: in the first weeks water every 4 days.

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

24 May — feed: nitrogen

Pests and diseases of cucumber 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 cucumber season

No month of the season averages above the cucumber 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

Cucumber 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 – 13 August	6 days earlier
Des Moines	198 km	17 May – 12 August	same day
Grand Island	206 km	18 May – 12 August	1 day later
Topeka	249 km	6 May – 14 August	11 days earlier
Sioux Falls	262 km	24 May – 6 August	7 days later
Kansas City	267 km	7 May – 17 August	10 days earlier

Where to buy cucumber plants and seeds near Omaha

Buy plants ready to set out from 17 May to 11 August (from 26 April to 11 August for an unheated greenhouse); seed for raising your own is sown from 29 March to 14 July. Within 15 km of Omaha OpenStreetMap lists 8 garden centres, 1 plant nursery, 5 markets and 2 farm shops (collected 20 October 2026).

Omaha Farmer's Market — market
May Sat[1]–Oct Sat[2] Sat 08:00–12:30 · 1 km · omahafarmersmarket.com
Omaha Farmer's Market — market
May Sun[1]–Oct Sun[2] Sun 09:00–13:00 · 7 km
Farmers Market — market
Thu 16:30–19:30 · 7 km
Farmers Market — market
Sun 10:00–15:00 · 10 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