When to plant cucumbers in Gatineau: 11 June – 17 August

In Gatineau, cucumber: sow for seedlings from 23 April to 20 July; plant into a greenhouse from 21 May to 17 August; plant out into open ground from 11 June to 17 August. For plants and seeds, the places nearby include Budd Gardens (garden centre, 12 km) and Lindsay Landscape (garden centre, 13 km); addresses and opening hours are below.

Cucumber in Gatineau: soil, season and weather

In Gatineau 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 cucumber card — only around 11 June, 42 days later.

Last spring frost	30 April
Top 7 cm of soil at 18 °C	11 June, 42 days after the last frost
Into an unheated greenhouse	21 May – 17 August; May outside: 7.5 °C at night, 18.8 °C by day; card 18–25 °C
First autumn frost	1 November, 143 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	15 July – 20 September
Days left for picking	109
Daylight	14:50 on 14 May, 15:37 on 11 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, September, has 9 rainy days

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

Cucumber in Gatineau: care after planting

Planted on 11 June: in the first weeks water every 4 days.

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

18 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 Gatineau during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, July, averages 26.4 °C. Months that stay below 18 °C even by day on average: October (14.3 °C) and November (5.2 °C). Nights average below 18 °C in every month of the season, from -1.5 °C to 16.7 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.5	13.3	114	12	15:39
July	26.4	16.7	119	13	15:21
August	25	16.2	119	13	14:09
September	21.3	12.3	73	9	12:35
October	14.3	6.4	105	12	11:01
November	5.2	-1.5	81	13	9:32

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Gatineau, Montreal is 12 days earlier and Montpelier 9 days later.

City	Distance	Date	Difference
Ottawa	7 km	11 June – 17 August	same day
Montreal	166 km	30 May – 17 August	12 days earlier
Burlington	225 km	1 June – 19 August	10 days earlier
Trois-Rivières	262 km	31 May – 14 August	11 days earlier
Syracuse (United States)	272 km	31 May – 22 August	11 days earlier
Montpelier	282 km	20 June – 2 August	9 days later

Where to buy cucumber plants and seeds near Gatineau

Buy plants ready to set out from 11 June to 17 August (from 21 May to 17 August for an unheated greenhouse); seed for raising your own is sown from 23 April to 20 July. Within 15 km of Gatineau OpenStreetMap lists 9 garden centres, 1 farm-supply shop, 7 markets and 1 farm shop (collected 20 October 2026).

Artistic Landscape Designs — garden centre
Artistic Place 2079, K1V 8A8 · 14 km
Budd Gardens — garden centre
Innes Road 2832 · 12 km
Lindsay Landscape — garden centre
Russell Road 3968 · 13 km
Orleans Landscaping — garden centre
St. Joseph Boulevard 2473 · 14 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