When to plant watermelons in Moncton: 26 June – 26 July

In Moncton, watermelon: sow for seedlings from 8 May to 28 June; plant into a greenhouse from 5 June to 26 July; plant out into open ground from 26 June to 26 July. For plants and seeds, the places nearby include Hardy's Produce (farm shop, 2 km) and MacArthur's Nurseries Inc. (garden centre, 3 km); addresses and opening hours are below.

Watermelon in Moncton: soil, season and weather

In Moncton the soil, not frost, sets the date: the last frost is over around 1 May, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 26 June, 56 days later.

Last spring frost	1 May
Top 7 cm of soil at 18 °C	26 June, 56 days after the last frost
Into an unheated greenhouse	5 June – 26 July; June outside: 12 °C at night, 21.4 °C by day; card 18–35 °C
First autumn frost	4 November, 131 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	24 August – 23 September
Days left for picking	72
Daylight	15:25 on 29 May, 15:45 on 26 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 9 rainy days

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

Watermelon in Moncton: care after planting

Planted on 26 June: in the first weeks water every 5 days.

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

26 June — 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 Moncton during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 25.3 °C. Months that stay below 18 °C even by day on average: October (14.5 °C) and November (6.7 °C). Nights average below 18 °C in every month of the season, from -0.3 °C to 16.3 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	21.4	12	106	12	15:44
July	25.3	16.3	103	12	15:26
August	24.6	15.7	97	11	14:12
September	20.4	11.9	87	9	12:36
October	14.5	6.6	103	11	10:59
November	6.7	-0.3	123	12	9:29

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Moncton, Quebec City is 5 days earlier and Halifax 7 days later.

City	Distance	Date	Difference
Charlottetown	130 km	27 June – 24 July	1 day later
Fredericton	145 km	28 June – 19 July	2 days later
Halifax	186 km	3 July – 31 July	7 days later
Bangor	338 km	25 June – 25 July	1 day earlier
Augusta	437 km	22 June – 25 July	4 days earlier
Quebec City	497 km	21 June – 19 July	5 days earlier

Where to buy watermelon plants and seeds near Moncton

Buy plants ready to set out from 26 June to 26 July (from 5 June to 26 July for an unheated greenhouse); seed for raising your own is sown from 8 May to 28 June. Within 15 km of Moncton OpenStreetMap lists 1 garden centre, 2 markets and 1 farm shop (collected 20 October 2026).

MacArthur's Nurseries Inc. — garden centre
McLaughlin Drive 232 · Mon–Sat 09:00–18:00; Sun 10:00–17:00 · 3 km · macarthursnurseries.com
Marché Moncton Market — market
Westmorland Street 120, Moncton · Sat 08:00–14:00; Mon–Fri 10:00–16:00 · 2 km · marchemonctonmarket.ca
Dieppe Market — market
Gauvin Road 232 · Wed–Fri 10:00–18:00; Sat 08:00–13:00 · 4 km · marchedieppemarket.com
Hardy's Produce — farm shop
Mountain Road 1063, E1C 2S9 Moncton · Mon–Sat 09:00–20:00; Sun 00:00–18:00 · 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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