When to plant eggplants in Sioux Falls: 24 May – 1 July

In Sioux Falls, eggplant: sow for seedlings from 4 March to 2 May; plant into a greenhouse from 3 May to 1 July; plant out into open ground from 24 May to 1 July.

Eggplant in Sioux Falls: soil, season and weather

In Sioux Falls the soil, not frost, sets the date: the last frost is over around 24 April, but the top 7 cm of soil reaches 18 °C — the minimum on the eggplant card — only around 24 May, 30 days later.

Last spring frost	24 April
Top 7 cm of soil at 18 °C	24 May, 30 days after the last frost
Into an unheated greenhouse	3 May – 1 July; May outside: 10 °C at night, 21.5 °C by day; card 21–29 °C
First autumn frost	21 October, 150 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	2 August – 9 September
Days left for picking	80
Daylight	12:22 on 25 March, 14:59 on 24 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 8 rainy days

The same dates in Sioux Falls hold for Cucumber, Bell Pepper, Zucchini, Pumpkin and Watermelon.

Eggplant in Sioux Falls: care after planting

Planted on 24 May: in the first weeks water every 4 days.

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

24 May — feed: balanced (NPK)
21 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 Sioux Falls during the eggplant season

Days average above the eggplant card's 21–29 °C in July (29.2 °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 6 °C to 18.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	21.5	10	108	11	14:41
June	28.2	16.9	110	11	15:24
July	29.2	18.6	71	8	15:07
August	27.5	17.5	90	10	14:01
September	25.1	14.5	64	8	12:33
October	16	6	67	8	11:05

ERA5 2016–2025, Open-Meteo

Eggplant in nearby cities

Around Sioux Falls, Lincoln is 13 days earlier and Minneapolis 4 days later.

City	Distance	Date	Difference
Omaha	262 km	17 May – 6 July	7 days earlier
Pierre	302 km	25 May – 4 July	1 day later
Lincoln	304 km	11 May – 8 July	13 days earlier
Minneapolis	319 km	28 May – 4 July	4 days later
Grand Island	321 km	18 May – 7 July	6 days earlier
Des Moines	334 km	17 May – 7 July	7 days earlier

Where to buy eggplant plants and seeds near Sioux Falls

Buy plants ready to set out from 24 May to 1 July (from 3 May to 1 July for an unheated greenhouse); seed for raising your own is sown from 4 March to 2 May. Within 15 km of Sioux Falls OpenStreetMap lists 1 garden centre, 5 farm-supply shops, 2 markets and 1 farm shop (collected 20 October 2026).

Landscape Garden Centers — garden centre
9 km
Equipment Blades — farm supply
11 km
Monsanto — farm supply
12 km
AgReliant Genetics — farm supply
13 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