When to plant cucumbers in Hamilton: 1 June – 23 August

In Hamilton, cucumber: sow for seedlings from 13 April to 26 July; plant into a greenhouse from 11 May to 23 August; plant out into open ground from 1 June to 23 August. For plants and seeds, the places nearby include Garden Centre (garden centre, 3 km) and Northland Nurseries (garden centre, 15 km); addresses and opening hours are below.

Cucumber in Hamilton: soil, season and weather

In Hamilton the soil, not frost, sets the date: the last frost is over around 19 April, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 1 June, 43 days later.

Last spring frost	19 April
Top 7 cm of soil at 18 °C	1 June, 43 days after the last frost
Into an unheated greenhouse	11 May – 23 August; May outside: 9.4 °C at night, 18.8 °C by day; card 18–25 °C
First autumn frost	7 November, 159 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	5 July – 26 September
Days left for picking	125
Daylight	14:14 on 4 May, 15:10 on 1 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, September, has 9 rainy days

The same dates in Hamilton hold for Bell Pepper, Eggplant, Zucchini, Pumpkin and Watermelon.

Cucumber in Hamilton: care after planting

Planted on 1 June: in the first weeks water every 4 days.

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

8 June — feed: nitrogen

Pests and diseases of cucumber 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 Hamilton during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, July, averages 28 °C. Months that stay below 18 °C even by day on average: October (16.6 °C) and November (9.1 °C). Nights average below 18 °C in June and September–November (2.4–15.6 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	24.8	15.6	71	10	15:22
July	28	18.8	86	11	15:05
August	26.6	18.5	69	11	13:59
September	23.2	15.3	59	9	12:33
October	16.6	9.4	85	11	11:05
November	9.1	2.4	61	10	9:44

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Hamilton, Toronto is 3 days earlier and Rochester 1 day later.

City	Distance	Date	Difference
Kitchener	57 km	31 May – 11 August	1 day earlier
Toronto	58 km	29 May – 15 August	3 days earlier
Buffalo	88 km	29 May – 26 August	3 days earlier
London (Canada)	116 km	29 May – 23 August	3 days earlier
Erie	126 km	30 May – 4 September	2 days earlier
Rochester	181 km	2 June – 28 August	1 day later

Where to buy cucumber plants and seeds near Hamilton

Buy plants ready to set out from 1 June to 23 August (from 11 May to 23 August for an unheated greenhouse); seed for raising your own is sown from 13 April to 26 July. Within 15 km of Hamilton OpenStreetMap lists 10 garden centres, 5 markets and 4 farm shops (collected 20 October 2026).

Garden Centre — garden centre
Upper James Street 675 · 3 km
Northland Nurseries — garden centre
Mon–Sun, public holidays 09:00–17:00 · 15 km
Ottawa Street Farmers' Market — market
Britannia Avenue 3, L8H 3Z5 Hamilton · Sat 08:00–14:00 · 3 km · ottawastreetfarmers.com
Hamilton Farmer's Market — market
York Boulevard 35 · Tue–Fri 09:00–16:00; Wed closed; Sat 08:00–16:00 · 2 km · hamiltonfarmersmarket.ca

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.

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