When to plant pumpkins in Hamilton: 1 June – 13 July

In Hamilton, pumpkin: sow for seedlings from 30 March to 1 June; plant into a greenhouse from 11 May to 13 July; plant out into open ground from 1 June to 13 July. For plants and seeds, the places nearby include Garden Centre (garden centre, 3 km) and The Dirt Depot (garden centre, 9 km); addresses and opening hours are below.

Pumpkin 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 pumpkin 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
First autumn frost	7 November, 159 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	15 August – 26 September
Days left for picking	84
Daylight	13:37 on 20 April, 15:10 on 1 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 9 rainy days

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

Pumpkin 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:

22 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 Hamilton during the pumpkin season

About 431 mm of rain falls in the season; September is the driest month (59 mm) and July the wettest (86 mm).

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

Pumpkin in nearby cities

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

City	Distance	Date	Difference
Kitchener	57 km	31 May – 1 July	1 day earlier
Toronto	58 km	29 May – 5 July	3 days earlier
Buffalo	88 km	29 May – 16 July	3 days earlier
London (Canada)	116 km	29 May – 13 July	3 days earlier
Erie	126 km	30 May – 25 July	2 days earlier
Rochester	181 km	2 June – 18 July	1 day later

Where to buy pumpkin plants and seeds near Hamilton

Buy plants ready to set out from 1 June to 13 July (from 11 May to 13 July for an unheated greenhouse); seed for raising your own is sown from 30 March to 1 June. Within 15 km of Hamilton OpenStreetMap lists 10 garden centres, 5 markets and 4 farm shops (collected 20 October 2026).

Fora Outdoor — garden centre
Fiddlers Green Road 591, L9G 3L1 · Mon–Sat 09:00–17:00 · 12 km · foraoutdoor.com
The Dirt Depot — garden centre
Highway 5 West 163 · 9 km · thedirtdepot.com
Terra — garden centre
Dundas Street 2273, Burlington · 13 km
Garden Centre — garden centre
Upper James Street 675 · 3 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