When to plant watermelons in Halifax: 3 July – 31 July

In Halifax, watermelon: sow for seedlings from 15 May to 3 July; plant into a greenhouse from 12 June to 31 July; plant out into open ground from 3 July to 31 July. For plants and seeds, the places nearby include Halifax Seed Company (garden centre, 2 km) and Walker's Feed (farm supply, 9 km); addresses and opening hours are below.

Watermelon in Halifax: soil, season and weather

In Halifax 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 watermelon card — only around 3 July, 65 days later.

Last spring frost	29 April
Top 7 cm of soil at 18 °C	3 July, 65 days after the last frost
Into an unheated greenhouse	12 June – 31 July; June outside: 11.6 °C at night, 20.2 °C by day; card 18–35 °C
First autumn frost	9 November, 129 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	31 August – 28 September
Days left for picking	70
Daylight	15:25 on 5 June, 15:30 on 3 July
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 11 rainy days

The same dates in Halifax hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Halifax: care after planting

Planted on 3 July: in the first weeks water every 5 days.

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

3 July — feed: balanced (NPK)

Pests and diseases of watermelon 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 Halifax during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 24.2 °C. Months that stay below 18 °C even by day on average: October (15.3 °C) and November (8.7 °C). Nights average below 18 °C in every month of the season, from 2 °C to 16.4 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
July	24.2	16.2	103	12	15:15
August	24.1	16.4	98	11	14:05
September	20.6	13.3	103	9	12:34
October	15.3	8.2	137	10	11:02
November	8.7	2	142	12	9:37

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon earlier than Halifax; the closest date is in Fredericton, 5 days earlier.

City	Distance	Date	Difference
Charlottetown	179 km	27 June – 24 July	6 days earlier
Moncton	186 km	26 June – 26 July	7 days earlier
Fredericton	282 km	28 June – 19 July	5 days earlier
Bangor	410 km	25 June – 25 July	8 days earlier
Augusta	493 km	22 June – 25 July	11 days earlier
Portland, Maine	544 km	20 June – 26 July	13 days earlier

Where to buy watermelon plants and seeds near Halifax

Buy plants ready to set out from 3 July to 31 July (from 12 June to 31 July for an unheated greenhouse); seed for raising your own is sown from 15 May to 3 July. Within 15 km of Halifax OpenStreetMap lists 2 garden centres, 1 farm-supply shop, 7 markets and 2 farm shops (collected 20 October 2026).

Halifax Seed Company — garden centre
Kane Street 5860, B3K 5L8 Halifax · Mon–Fri 09:00–17:00; Sat 09:00–16:00 · 2 km · halifaxseed.ca
Lakeland Plant World — garden centre
Highway 7 909, B2W 3V2 Westphal · 9 km
Walker's Feed — farm supply
Cole Harbour Road 1397, B2V 1N5 Cole Harbour · Mon–Wed, Fri 09:00–17:00; Thu 09:00–18:00; Sat 09:00–15:00 · 9 km · walkersfeed.ca
Warehouse Market — market
Isleville Street 2867, B3K 3X4 Halifax · Wed–Fri 11:00–18:00; Sat 09:00–16:00 · 2 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.

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