When to plant zucchini in Indianapolis: 16 May – 20 August

In Indianapolis, zucchini: sow for seedlings from 4 April to 30 July; plant into a greenhouse from 25 April to 20 August; plant out into open ground from 16 May to 20 August. For plants and seeds, the places nearby include Botanical Bar (garden centre, 2 km) and Snakeroot Botanicals (garden centre, 3 km); addresses and opening hours are below.

Zucchini in Indianapolis: soil, season and weather

In Indianapolis the soil, not frost, sets the date: the last frost is over around 14 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 16 May, 32 days later.

Last spring frost	14 April
Top 7 cm of soil at 18 °C	16 May, 32 days after the last frost
First autumn frost	6 November, 174 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	21 June – 25 September
Days left for picking	138
Daylight	13:38 on 25 April, 14:23 on 16 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 9 rainy days

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

Zucchini in Indianapolis: care after planting

Planted on 16 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Indianapolis during the zucchini season

About 651 mm of rain falls in the season; November is the driest month (72 mm) and July the wettest (124 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	22.9	12.4	120	14	14:21
June	28.4	17.6	89	11	14:58
July	29.7	19.8	124	13	14:44
August	28.5	18.7	88	10	13:46
September	26.2	15.9	76	7	12:30
October	19.5	9.7	82	10	11:12
November	11.3	2.4	72	9	10:01

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Indianapolis, Evansville is 11 days earlier and Fort Wayne 5 days later.

City	Distance	Date	Difference
Cincinnati	159 km	13 May – 23 August	3 days earlier
Dayton	168 km	16 May – 23 August	same day
Fort Wayne	169 km	21 May – 16 August	5 days later
Louisville	173 km	7 May – 25 August	9 days earlier
Frankfort	207 km	13 May – 17 August	3 days earlier
Evansville	233 km	5 May – 24 August	11 days earlier

Where to buy zucchini plants and seeds near Indianapolis

Buy plants ready to set out from 16 May to 20 August (from 25 April to 20 August for an unheated greenhouse); seed for raising your own is sown from 4 April to 30 July. Within 15 km of Indianapolis OpenStreetMap lists 9 garden centres, 1 farm-supply shop, 2 plant nurseries and 4 markets (collected 20 October 2026).

Snakeroot Botanicals — garden centre
Virginia Avenue 1052, 46203 Indianapolis · Mon–Sun 11:00–19:00 · 3 km
Backyard Blessings Garden Center — garden centre
East 30th Street 8005, 46226 Indianapolis · 12 km · indygardencenter.com
DIGS — garden centre
Columbia Avenue 1302, 46201 Indianapolis · 3 km
Botanical Bar — garden centre
North College Avenue 1103, 46202 Indianapolis · 2 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