When to plant tomatoes in Bangor: 31 May – 14 July

In Bangor, tomato: sow for seedlings from 19 March to 23 May; plant into a greenhouse from 10 May to 14 July; plant out into open ground from 31 May to 14 July. For plants and seeds, the places nearby include Bangor Community Garden (garden centre, 5 km); addresses and opening hours are below.

Tomato 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 15 °C — the minimum on the tomato card — only around 31 May, 37 days later.

Last spring frost	24 April
Top 7 cm of soil at 15 °C	31 May, 37 days after the last frost
Into an unheated greenhouse	10 May – 14 July; May outside: 7.2 °C at night, 17.7 °C by day; card 16–27 °C
First autumn frost	3 November, 156 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	9 August – 22 September
Days left for picking	86
Daylight	13:10 on 9 April, 15:20 on 31 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 7 rainy days

Tomato in Bangor: care after planting

Planted on 31 May: in the first weeks water every 4 days.

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

31 May — feed: balanced (NPK)
28 June — feed: nitrogen

Pests and diseases of tomato 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 tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, July, averages 26.5 °C. Months that stay below 16 °C even by day on average: October (15.2 °C) and November (7.3 °C). Nights average below 16 °C in May, June and September–November (-0.1–12.8 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	17.7	7.2	82	10	14:49
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

Tomato in nearby cities

Around Bangor, Concord is 9 days earlier and Fredericton 5 days later.

City	Distance	Date	Difference
Augusta	101 km	27 May – 14 July	4 days earlier
Portland, Maine	179 km	28 May – 15 July	3 days earlier
Fredericton	203 km	5 June – 8 July	5 days later
Sherbrooke	253 km	27 May – 7 July	4 days earlier
Quebec City	288 km	27 May – 8 July	4 days earlier
Concord	288 km	22 May – 11 July	9 days earlier

Where to buy tomato plants and seeds near Bangor

Buy plants ready to set out from 31 May to 14 July (from 10 May to 14 July for an unheated greenhouse); seed for raising your own is sown from 19 March to 23 May. 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