When to plant bell peppers in Letterkenny: 7 July – 8 August

In Letterkenny, bell pepper: sow for seedlings from 17 April to 9 June; plant into a greenhouse from 16 June to 8 August; plant out into open ground from 7 July to 8 August. For plants and seeds, the places nearby include Gary's Petworld and Garden Centre (garden centre, 2 km); addresses and opening hours are below.

Bell Pepper in Letterkenny: soil, season and weather

In Letterkenny the soil, not frost, sets the date: the last frost is over around 30 March, but the top 7 cm of soil reaches 18 °C — the minimum on the bell pepper card — only around 7 July, 99 days later.

Last spring frost	30 March
Top 7 cm of soil at 18 °C	7 July, 99 days after the last frost
Into an unheated greenhouse	16 June – 8 August; June outside: 10.1 °C at night, 16.8 °C by day; card 15–30 °C
First autumn frost	28 November, 144 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	15 September – 17 October
Days left for picking	74
Daylight	15:40 on 8 May, 17:08 on 7 July
Watering outdoors when fruiting (card)	every 4 days; the driest month, September, has 18 rainy days

The same dates in Letterkenny hold for Cucumber, Eggplant, Zucchini, Pumpkin and Watermelon.

Bell Pepper in Letterkenny: care after planting

Planted on 7 July: in the first weeks water every 5 days.

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

7 July — feed: balanced (NPK)
4 August — feed: nitrogen

Pests and diseases of bell pepper 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 Letterkenny during the bell pepper season

No month of the season averages above the bell pepper card's 15–30 °C by day; the warmest, August, averages 17.7 °C. Months that stay below 15 °C even by day on average: October (12.8 °C) and November (9.5 °C). Nights average below 15 °C in every month of the season, from 4.9 °C to 11.5 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
July	17.6	11.4	115	18	16:50
August	17.7	11.5	126	20	15:01
September	15.8	9.8	102	18	12:48
October	12.8	7.9	120	18	10:35
November	9.5	4.9	103	18	8:27

ERA5 2016–2025, Open-Meteo

Bell Pepper in nearby cities

Around Letterkenny, Sligo is 7 days earlier and Dundalk 10 days later.

City	Distance	Date	Difference
Derry	26 km	13 July – 1 August	6 days later
Sligo	91 km	30 June – 1 August	7 days earlier
Belfast	122 km	7 July – 30 July	same day
Dundalk	137 km	17 July – 31 July	10 days later
Athlone	172 km	13 July – 6 August	6 days later
Dublin	203 km	16 July – 4 August	9 days later

Where to buy bell pepper plants and seeds near Letterkenny

Buy plants ready to set out from 7 July to 8 August (from 16 June to 8 August for an unheated greenhouse); seed for raising your own is sown from 17 April to 9 June. Within 15 km of Letterkenny OpenStreetMap lists 3 garden centres and 1 market (collected 28 October 2026).

Gary's Petworld and Garden Centre — garden centre
Mon–Fri 09:00–18:00 · 2 km
Alcorns — garden centre
2 km · alcorns.ie
Raphoe Garden Centre — garden centre
12 km
Market Square — market
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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