When to plant pumpkins in Quebec City: 21 June – 3 July

In Quebec City, pumpkin: sow for seedlings from 19 April to 22 May; plant into a greenhouse from 31 May to 3 July; plant out into open ground from 21 June to 3 July. For plants and seeds, the places nearby include L'Haies Pro (garden centre, 4 km) and Jardin Hamel (garden centre, 10 km); addresses and opening hours are below.

Pumpkin in Quebec City: soil, season and weather

In Quebec City the soil, not frost, sets the date: the last frost is over around 5 May, but the top 7 cm of soil reaches 18 °C — the minimum on the pumpkin card — only around 21 June, 47 days later. 129 days separate planting out (21 June) from the first autumn frost (28 October); the card's 75 days to the first harvest leave 54 for picking, so a start 7 weeks late would still fit.

Last spring frost	5 May
Top 7 cm of soil at 18 °C	21 June, 47 days after the last frost
First autumn frost	28 October, 129 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	4 September – 16 September
Days left for picking	54
Daylight	14:48 on 10 May, 15:52 on 21 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 11 rainy days

The same dates in Quebec City hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Watermelon.

Pumpkin in Quebec City: care after planting

Planted on 21 June: in the first weeks water every 4 days.

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

12 July — feed: nitrogen

Pests and diseases of pumpkin 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 Quebec City during the pumpkin season

About 678 mm of rain falls in the season; September is the driest month (101 mm) and July the wettest (161 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.6	12.6	144	13	15:51
July	25.4	16.2	161	16	15:31
August	24.2	15.3	144	15	14:15
September	20.2	11.1	101	11	12:37
October	13.3	5.4	128	12	10:58

ERA5 2016–2025, Open-Meteo

Pumpkin in nearby cities

Around Quebec City, Montreal is 22 days earlier and Saguenay 11 days later.

City	Distance	Date	Difference
Trois-Rivières	114 km	31 May – 4 July	21 days earlier
Sherbrooke	165 km	18 June – 2 July	3 days earlier
Saguenay	180 km	2 July – 8 August	11 days later
Montreal	233 km	30 May – 7 July	22 days earlier
Bangor	288 km	25 June – 9 July	4 days later
Augusta	299 km	22 June – 9 July	1 day later

Where to buy pumpkin plants and seeds near Quebec City

Buy plants ready to set out from 21 June to 3 July (from 31 May to 3 July for an unheated greenhouse); seed for raising your own is sown from 19 April to 22 May. Within 15 km of Quebec City OpenStreetMap lists 6 garden centres, 1 farm-supply shop and 3 markets (collected 20 October 2026).

L'Haies Pro — garden centre
Rue De Ségur 1633, G6W 0T6 Lévis · Mon–Fri 06:00–18:00 · 4 km · haiespro.com
Jardin Hamel — garden centre
Boulevard Wilfrid-Hamel 6029, L'Ancienne-Lorette · Mon–Wed 09:00–18:00; Thu–Fri 09:00–21:00; Sat–Sun 08:30–17:00 · 10 km
Centre Jardin de l'aeroport — garden centre
Route de l'Aéroport 1762 · 13 km · jardindeaeroport.com
Floralies Jouvences — garden centre
Avenue Jules-Verne 2020, G2G 2R2 Québec · 13 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