When to plant zucchini in Windsor: 27 May – 21 August

In Windsor, zucchini: sow for seedlings from 15 April to 31 July; plant into a greenhouse from 6 May to 21 August; plant out into open ground from 27 May to 21 August.

Zucchini in Windsor: soil, season and weather

In Windsor 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 zucchini card — only around 27 May, 33 days later.

Last spring frost	24 April
Top 7 cm of soil at 18 °C	27 May, 33 days after the last frost
First autumn frost	7 November, 164 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	2 July – 26 September
Days left for picking	128
Daylight	14:14 on 6 May, 14:56 on 27 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 9 rainy days

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

Zucchini in Windsor: care after planting

Planted on 27 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Windsor during the zucchini season

About 585 mm of rain falls in the season; November is the driest month (60 mm) and July the wettest (92 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	20.7	10.6	90	13	14:34
June	26.6	16.5	90	11	15:15
July	28.6	19.3	92	12	14:59
August	27.2	18.4	91	11	13:56
September	24	15.5	72	9	12:32
October	17.2	9.2	90	12	11:07
November	9.1	2	60	9	9:49

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Windsor, Toledo (United States) is 3 days earlier and Ann Arbor 2 days later.

City	Distance	Date	Difference
Detroit	4 km	27 May – 21 August	same day
Ann Arbor	60 km	29 May – 19 August	2 days later
Toledo (United States)	84 km	24 May – 21 August	3 days earlier
Lansing	134 km	28 May – 16 August	1 day later
Cleveland	141 km	28 May – 4 September	1 day later
London (Canada)	165 km	29 May – 21 August	2 days later

Where to buy zucchini plants and seeds near Windsor

Buy plants ready to set out from 27 May to 21 August (from 6 May to 21 August for an unheated greenhouse); seed for raising your own is sown from 15 April to 31 July. Within 15 km of Windsor OpenStreetMap lists 3 garden centres, 1 farm-supply shop, 11 plant nurseries, 8 markets and 3 farm shops (collected 20 October 2026).

Hantz Woodlands — plant nursery
8 km
Hantz Woodlands — plant nursery
8 km
Hantz Woodslands — plant nursery
8 km
Hantz Woodlands — plant nursery
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