When to plant cucumbers in Topeka: 6 May – 14 August

In Topeka, cucumber: sow for seedlings from 18 March to 17 July; plant into a greenhouse from 15 April to 14 August; plant out into open ground from 6 May to 14 August. For plants and seeds, the places nearby include Murphy Tractor & Equipment (farm shop, 6 km) and LDI - Topeka (farm supply, 7 km); addresses and opening hours are below.

Cucumber in Topeka: soil, season and weather

In Topeka the soil, not frost, sets the date: the last frost is over around 9 April, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 6 May, 27 days later.

Last spring frost	9 April
Top 7 cm of soil at 18 °C	6 May, 27 days after the last frost
Into an unheated greenhouse	15 April – 14 August; April outside: 7.9 °C at night, 20 °C by day; card 18–25 °C
First autumn frost	29 October, 176 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	9 June – 17 September
Days left for picking	142
Daylight	12:55 on 8 April, 14:00 on 6 May
Watering outdoors when fruiting (card)	every 2 days; the driest month, October, has 8 rainy days

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

Cucumber in Topeka: care after planting

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

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

13 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 Topeka during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, July, averages 31.8 °C. Nights average below 18 °C in May (13.8 °C), September (17.8 °C) and October (10.4 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	24.5	13.8	168	14	14:18
June	30.8	20.1	93	10	14:54
July	31.8	21.8	122	10	14:39
August	30.7	20.7	100	10	13:43
September	28	17.8	83	8	12:29
October	20.9	10.4	73	8	11:14

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Topeka, Wichita is 4 days earlier and Grand Island 12 days later.

City	Distance	Date	Difference
Kansas City	97 km	7 May – 17 August	1 day later
Wichita	207 km	2 May – 15 August	4 days earlier
Lincoln	215 km	11 May – 13 August	5 days later
Joplin	241 km	5 May – 17 August	1 day earlier
Omaha	249 km	17 May – 11 August	11 days later
Grand Island	309 km	18 May – 12 August	12 days later

Where to buy cucumber plants and seeds near Topeka

Buy plants ready to set out from 6 May to 14 August (from 15 April to 14 August for an unheated greenhouse); seed for raising your own is sown from 18 March to 17 July. Within 15 km of Topeka OpenStreetMap lists 2 farm-supply shops, 4 markets and 1 farm shop (collected 28 October 2026).

Hi-Crest Market — market
Southeast Golf Park Boulevard 455, 66605 Topeka · Sat[2] 09:00–11:00 · 3 km
Murphy Tractor & Equipment — farm shop
Northwest Gage Boulevard 1621, 66618 Topeka · 6 km
Farmers Market — market
2 km
LDI - Topeka — farm supply
Mon–Fri 08:00–17:00; Sat 08:00–12:00 · 7 km · ldi.us

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