When to plant watermelons in Bangor: 25 June – 25 July

In Bangor, watermelon: sow for seedlings from 7 May to 27 June; plant into a greenhouse from 4 June to 25 July; plant out into open ground from 25 June to 25 July. For plants and seeds, the places nearby include Bangor Community Garden (garden centre, 5 km); addresses and opening hours are below.

Watermelon in Bangor: soil, season and weather

In Bangor the soil, not frost, sets the date: the last frost is over around 24 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 25 June, 62 days later.

Last spring frost	24 April
Top 7 cm of soil at 18 °C	25 June, 62 days after the last frost
Into an unheated greenhouse	4 June – 25 July; June outside: 12.8 °C at night, 22.7 °C by day; card 18–35 °C
First autumn frost	3 November, 131 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	23 August – 22 September
Days left for picking	72
Daylight	15:15 on 28 May, 15:36 on 25 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 7 rainy days

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

Watermelon in Bangor: care after planting

Planted on 25 June: in the first weeks water every 5 days.

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

25 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 Bangor during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 26.5 °C. Months that stay below 18 °C even by day on average: October (15.2 °C) and November (7.3 °C). Nights average below 18 °C in every month of the season, from -0.1 °C to 16.8 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.7	12.8	90	13	15:35
July	26.5	16.8	88	11	15:17
August	25.6	16.3	86	10	14:06
September	21.6	12.7	80	7	12:35
October	15.2	7.1	111	10	11:02
November	7.3	-0.1	95	11	9:36

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Bangor, Concord is 24 days earlier and Fredericton 3 days later.

City	Distance	Date	Difference
Augusta	101 km	22 June – 25 July	3 days earlier
Portland, Maine	179 km	20 June – 26 July	5 days earlier
Fredericton	203 km	28 June – 19 July	3 days later
Sherbrooke	253 km	18 June – 18 July	7 days earlier
Quebec City	288 km	21 June – 19 July	4 days earlier
Concord	288 km	1 June – 22 July	24 days earlier

Where to buy watermelon plants and seeds near Bangor

Buy plants ready to set out from 25 June to 25 July (from 4 June to 25 July for an unheated greenhouse); seed for raising your own is sown from 7 May to 27 June. Within 15 km of Bangor OpenStreetMap lists 2 garden centres (collected 28 October 2026).

Bangor Community Garden — garden centre
402 Essex Street · 5 km · bangorme.myrec.com
Evermay Nursery — garden centre
6 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