When to plant zucchini in Kitchener: 31 May – 9 August

In Kitchener, zucchini: sow for seedlings from 19 April to 19 July; plant into a greenhouse from 10 May to 9 August; plant out into open ground from 31 May to 9 August.

Zucchini in Kitchener: soil, season and weather

In Kitchener the soil, not frost, sets the date: the last frost is over around 30 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 31 May, 31 days later.

Last spring frost	30 April
Top 7 cm of soil at 18 °C	31 May, 31 days after the last frost
First autumn frost	26 October, 148 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	6 July – 14 September
Days left for picking	112
Daylight	14:29 on 10 May, 15:09 on 31 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 9 rainy days

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

Zucchini in Kitchener: care after planting

Planted on 31 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Kitchener during the zucchini season

About 487 mm of rain falls in the season; September is the driest month (67 mm) and June the wettest (97 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19	7.8	80	12	14:41
June	24.4	13.6	97	11	15:24
July	26.8	16.3	79	12	15:07
August	25.3	15.7	80	11	14:00
September	22.1	12.5	67	9	12:33
October	15	6.7	84	12	11:05

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Kitchener, Cleveland is 3 days earlier and Hamilton 1 day later.

City	Distance	Date	Difference
Hamilton	57 km	1 June – 21 August	1 day later
London (Canada)	77 km	29 May – 21 August	2 days earlier
Toronto	94 km	29 May – 13 August	2 days earlier
Buffalo	145 km	29 May – 24 August	2 days earlier
Erie	149 km	30 May – 2 September	1 day earlier
Cleveland	236 km	28 May – 4 September	3 days earlier

Where to buy zucchini plants and seeds near Kitchener

Buy plants ready to set out from 31 May to 9 August (from 10 May to 9 August for an unheated greenhouse); seed for raising your own is sown from 19 April to 19 July. Within 15 km of Kitchener OpenStreetMap lists 13 garden centres, 1 farm-supply shop, 4 markets and 5 farm shops (collected 20 October 2026).

Gardenland — garden centre
15 km
inSeason Home and Garden — garden centre
15 km
Martin's Maple Syrup — market
10 km
Rolling Acres — market
10 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