When to plant pumpkins in London (Canada): 29 May – 13 July

In London (Canada), pumpkin: sow for seedlings from 27 March to 1 June; plant into a greenhouse from 8 May to 13 July; plant out into open ground from 29 May to 13 July. For plants and seeds, the places nearby include Millar Berry Farms (farm shop, 11 km) and The Living Centre (farm shop, 15 km); addresses and opening hours are below.

Pumpkin in London (Canada): soil, season and weather

In London (Canada) the soil, not frost, sets the date: the last frost is over around 28 April, but the top 7 cm of soil reaches 18 °C — the minimum on the pumpkin card — only around 29 May, 31 days later.

Last spring frost	28 April
Top 7 cm of soil at 18 °C	29 May, 31 days after the last frost
First autumn frost	7 November, 162 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	12 August – 26 September
Days left for picking	87
Daylight	13:28 on 17 April, 15:04 on 29 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 9 rainy days

The same dates in London (Canada) hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Watermelon.

Pumpkin in London (Canada): care after planting

Planted on 29 May: in the first weeks water every 4 days.

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

19 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 London (Canada) during the pumpkin season

About 605 mm of rain falls in the season; September is the driest month (62 mm) and July the wettest (103 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19.7	9	82	12	14:38
June	25	14.6	90	11	15:20
July	27	17.4	103	12	15:04
August	25.7	16.8	98	13	13:58
September	22.8	13.8	62	9	12:33
October	15.9	7.9	97	13	11:06
November	7.9	1.1	73	13	9:45

ERA5 2016–2025, Open-Meteo

Pumpkin in nearby cities

Around London (Canada), Windsor is 2 days earlier and Hamilton 3 days later.

City	Distance	Date	Difference
Kitchener	77 km	31 May – 1 July	2 days later
Hamilton	116 km	1 June – 13 July	3 days later
Erie	133 km	30 May – 25 July	1 day later
Windsor	165 km	27 May – 13 July	2 days earlier
Detroit	165 km	27 May – 13 July	2 days earlier
Toronto	167 km	29 May – 5 July	same day

Where to buy pumpkin plants and seeds near London (Canada)

Buy plants ready to set out from 29 May to 13 July (from 8 May to 13 July for an unheated greenhouse); seed for raising your own is sown from 27 March to 1 June. Within 15 km of London (Canada) OpenStreetMap lists 5 garden centres, 3 markets and 2 farm shops (collected 20 October 2026).

Covent Garden Market — market
King Street 130, N6A 1C5 London · Tue–Sat 09:00–19:00; Sun 10:00–17:00 · 2 km · coventmarket.com
The Market — market
King Street 900, N5Y 5P8 London · 1 km · westernfairdistrict.com
Millar Berry Farms — farm shop
Longwoods Road 7375, N6P1L2 London · 11 km · millarberryfarms.com
The Living Centre — farm shop
Bells Road 5871, N6P 1P3 · 15 km · thelivingcentre.com

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