When to plant zucchini in Billings: 2 June – 28 July

In Billings, zucchini: sow for seedlings from 21 April to 7 July; plant into a greenhouse from 12 May to 28 July; plant out into open ground from 2 June to 28 July.

Zucchini 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 zucchini 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
First autumn frost	14 October, 134 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	8 July – 2 September
Days left for picking	98
Daylight	14:47 on 12 May, 15:29 on 2 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, July, has 3 rainy days

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

Zucchini in Billings: care after planting

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

Pests and diseases of zucchini to watch for:

Weather in Billings during the zucchini season

About 181 mm of rain falls in the season; July is the driest month (18 mm) and June the wettest (57 mm).

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

Zucchini in nearby cities

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

City	Distance	Date	Difference
Helena	287 km	3 July – 17 July	31 days later
Idaho Falls	377 km	4 June – 28 July	2 days later
Missoula	441 km	30 June – 20 July	28 days later
Rapid City	457 km	6 June – 26 July	4 days later
Regina	594 km	6 June – 20 July	4 days later
Cheyenne	595 km	8 June – 27 July	6 days later

Where to buy zucchini plants and seeds near Billings

Buy plants ready to set out from 2 June to 28 July (from 12 May to 28 July for an unheated greenhouse); seed for raising your own is sown from 21 April to 7 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).

General Implement Distributors — farm supply
6 km
Yellowstone Valley Food Hub — farm supply
6 km
Shipton's Big R Heights — farm supply
6 km
Trebro Manufacturing — farm supply
8 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