When to plant eggplants in Billings: 2 June – 24 June

In Billings, eggplant: sow for seedlings from 13 March to 25 April; plant into a greenhouse from 12 May to 24 June; plant out into open ground from 2 June to 24 June.

Eggplant 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 eggplant 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 – 24 June; May outside: 6.9 °C at night, 20.3 °C by day; card 21–29 °C
First autumn frost	14 October, 134 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	11 August – 2 September
Days left for picking	64
Daylight	12:53 on 3 April, 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, Zucchini, Pumpkin and Watermelon.

Eggplant 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:

2 June — feed: balanced (NPK)
30 June — feed: nitrogen

Pests and diseases of eggplant 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 eggplant season

Days average above the eggplant card's 21–29 °C in July (31.9 °C) and August (31 °C). Months that stay below 21 °C even by day on average: October (16 °C). Nights average below 21 °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

Eggplant in nearby cities

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

City	Distance	Date	Difference
Helena	287 km	3 July – 25 July	31 days later
Idaho Falls	377 km	4 June – 24 June	2 days later
Missoula	441 km	30 June – 28 July	28 days later
Rapid City	457 km	6 June – 22 June	4 days later
Regina	594 km	6 June – 16 June	4 days later
Cheyenne	595 km	8 June – 23 June	6 days later

Where to buy eggplant plants and seeds near Billings

Buy plants ready to set out from 2 June to 24 June (from 12 May to 24 June for an unheated greenhouse); seed for raising your own is sown from 13 March to 25 April. Within 15 km of Billings OpenStreetMap lists 7 garden centres, 11 farm-supply shops, 3 plant nurseries and 4 markets (collected 20 October 2026).

Anderson Service — farm supply
4 km
West Feeds Bulk Plant — farm supply
4 km
C & B Operations — farm supply
5 km
Billings Farmhand — farm supply
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