When to plant cucumbers in Cincinnati: 13 May – 25 August

In Cincinnati, cucumber: sow for seedlings from 25 March to 28 July; plant into a greenhouse from 22 April to 25 August; plant out into open ground from 13 May to 25 August. For plants and seeds, the places nearby include Fern (garden centre, 2 km) and Convenient Gardens (garden centre, 7 km); addresses and opening hours are below.

Cucumber in Cincinnati: soil, season and weather

In Cincinnati the soil, not frost, sets the date: the last frost is over around 11 April, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 13 May, 32 days later.

Last spring frost	11 April
Top 7 cm of soil at 18 °C	13 May, 32 days after the last frost
Into an unheated greenhouse	22 April – 25 August; April outside: 7 °C at night, 18.1 °C by day; card 18–25 °C
First autumn frost	9 November, 180 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	16 June – 28 September
Days left for picking	146
Daylight	13:12 on 15 April, 14:14 on 13 May
Watering outdoors when fruiting (card)	every 2 days; the driest month, September, has 7 rainy days

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

Cucumber in Cincinnati: care after planting

Planted on 13 May: in the first weeks water every 4 days.

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

20 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 Cincinnati during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, July, averages 30.1 °C. Months that stay below 18 °C even by day on average: November (12 °C). Nights average below 18 °C in May, June and September–November (3–17.8 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	23.3	13	125	15	14:18
June	28.3	17.8	99	12	14:54
July	30.1	20.2	109	13	14:40
August	28.9	19.1	83	12	13:44
September	26.6	16.4	75	7	12:29
October	20.1	10.1	76	10	11:14
November	12	3	76	9	10:04

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Cincinnati, Louisville is 6 days earlier and Columbus 7 days later.

City	Distance	Date	Difference
Dayton	75 km	16 May – 25 August	3 days later
Frankfort	108 km	13 May – 19 August	same day
Lexington	127 km	15 May – 23 August	2 days later
Louisville	146 km	7 May – 27 August	6 days earlier
Indianapolis	159 km	16 May – 22 August	3 days later
Columbus	159 km	20 May – 18 August	7 days later

Where to buy cucumber plants and seeds near Cincinnati

Buy plants ready to set out from 13 May to 25 August (from 22 April to 25 August for an unheated greenhouse); seed for raising your own is sown from 25 March to 28 July. Within 15 km of Cincinnati OpenStreetMap lists 10 garden centres, 6 markets and 2 farm shops (collected 20 October 2026).

Convenient Gardens — garden centre
Paxton Avenue 3862, 45209 Cincinnati · 7 km · convenientgardens.com
Fern — garden centre
East McMillan Street 737, 45206 Cincinnati · 2 km
Findlay Market — market
Sun 10:00–16:00; Tue–Fri 09:00–18:00; Sat 08:00–18:00 · 2 km · findlaymarket.org
B&D Asian Nepali Market — market
Winton Road 9172, 45231 Cincinnati · 12 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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