When to plant cucumbers in Billings: 2 June – 30 July

In Billings, cucumber: sow for seedlings from 14 April to 2 July; plant into a greenhouse from 12 May to 30 July; plant out into open ground from 2 June to 30 July.

Cucumber in Billings: soil, season and weather

In Billings the soil, not frost, sets the date: the last frost is over around 25 April, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 2 June, 38 days later.

Last spring frost	25 April
Top 7 cm of soil at 18 °C	2 June, 38 days after the last frost
Into an unheated greenhouse	12 May – 30 July; May outside: 6.9 °C at night, 20.3 °C by day; card 18–25 °C
First autumn frost	14 October, 134 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	6 July – 2 September
Days left for picking	100
Daylight	14:29 on 5 May, 15:29 on 2 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, July, has 3 rainy days

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

Cucumber in Billings: care after planting

Planted on 2 June: in the first weeks water every 4 days.

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

9 June — 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 Billings during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, July, averages 31.9 °C. Months that stay below 18 °C even by day on average: October (16 °C). Nights average below 18 °C in every month of the season, from 3.7 °C to 16.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	26.7	12.5	57	8	15:42
July	31.9	16.6	18	3	15:23
August	31	15.8	20	3	14:10
September	25.9	11.2	39	5	12:36
October	16	3.7	47	7	11:00

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

All the nearest cities on our list plant cucumber later than Billings; the closest date is in Idaho Falls, 2 days later.

City	Distance	Date	Difference
Helena	287 km	3 July – 19 July	31 days later
Idaho Falls	377 km	4 June – 30 July	2 days later
Missoula	441 km	30 June – 22 July	28 days later
Rapid City	457 km	6 June – 28 July	4 days later
Regina	594 km	6 June – 22 July	4 days later
Cheyenne	595 km	8 June – 29 July	6 days later

Where to buy cucumber plants and seeds near Billings

Buy plants ready to set out from 2 June to 30 July (from 12 May to 30 July for an unheated greenhouse); seed for raising your own is sown from 14 April to 2 July. Within 15 km of Billings OpenStreetMap lists 7 garden centres, 11 farm-supply shops, 3 plant nurseries and 4 markets (collected 20 October 2026).

Meadow Green Sales — garden centre
8 km
Billings Nursery & Landscaping — garden centre
11 km
Spring Creek Landscaping Co — garden centre
13 km
Gainan's Heights Flowers & Garden — plant nursery
5 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