When to plant pumpkins in Trois-Rivières: 31 May – 4 July

In Trois-Rivières, pumpkin: sow for seedlings from 29 March to 23 May; plant into a greenhouse from 10 May to 4 July; plant out into open ground from 31 May to 4 July. For plants and seeds, the places nearby include Ferme horticole Gagnon (farm shop, 8 km) and Rovibec Agrisolutions Inc. (farm supply, 11 km); addresses and opening hours are below.

Pumpkin in Trois-Rivières: soil, season and weather

In Trois-Rivières the soil, not frost, sets the date: the last frost is over around 29 April, but the top 7 cm of soil reaches 18 °C — the minimum on the pumpkin card — only around 31 May, 32 days later.

Last spring frost	29 April
Top 7 cm of soil at 18 °C	31 May, 32 days after the last frost
First autumn frost	29 October, 151 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	14 August – 17 September
Days left for picking	76
Daylight	13:45 on 19 April, 15:31 on 31 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 9 rainy days

The same dates in Trois-Rivières hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Watermelon.

Pumpkin in Trois-Rivières: care after planting

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

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

21 June — 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 Trois-Rivières during the pumpkin season

About 674 mm of rain falls in the season; September is the driest month (78 mm) and August the wettest (131 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19.2	7.9	93	12	14:58
June	23.6	13.7	125	14	15:47
July	26.2	17	130	15	15:27
August	24.8	15.9	131	14	14:13
September	21	12	78	9	12:36
October	14.4	6.3	117	12	10:59

ERA5 2016–2025, Open-Meteo

Pumpkin in nearby cities

Around Trois-Rivières, Montreal is 1 day earlier and Saguenay 32 days later.

City	Distance	Date	Difference
Quebec City	114 km	21 June – 3 July	21 days later
Sherbrooke	116 km	18 June – 2 July	18 days later
Montreal	123 km	30 May – 7 July	1 day earlier
Burlington	213 km	1 June – 9 July	1 day later
Montpelier	231 km	20 June – 22 June	20 days later
Saguenay	257 km	2 July – 8 August	32 days later

Where to buy pumpkin plants and seeds near Trois-Rivières

Buy plants ready to set out from 31 May to 4 July (from 10 May to 4 July for an unheated greenhouse); seed for raising your own is sown from 29 March to 23 May. Within 15 km of Trois-Rivières OpenStreetMap lists 1 garden centre, 2 farm-supply shops, 1 market and 2 farm shops (collected 20 October 2026).

Rovibec Agrisolutions Inc. — farm supply
Route du Port 475, J3T 1W3 Nicolet · 11 km · rovibecagrisolutions.com
Marché La Providence — market
Rue Champflour 1008, G9A 1Z7 Trois-Rivières · 1 km
Ferme horticole Gagnon — farm shop
Chemin Sainte-Marguerite 8620 · 8 km
Jardins Dugré — farm shop
Rang Saint-Charles 3861 · 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