When to plant bell peppers in Bonn: 4 June – 30 July

In Bonn, bell pepper: sow for seedlings from 15 March to 31 May; plant into a greenhouse from 14 May to 30 July; plant out into open ground from 4 June to 30 July. For plants and seeds, the places nearby include Kissener's Gartenmarkt (garden centre, 3 km) and BAMboo-bamBOO (garden centre, 6 km); addresses and opening hours are below.

Bell Pepper in Bonn: soil, season and weather

In Bonn the soil, not frost, sets the date: the last frost is over around 8 April, but the top 7 cm of soil reaches 18 °C — the minimum on the bell pepper card — only around 4 June, 57 days later.

Last spring frost	8 April
Top 7 cm of soil at 18 °C	4 June, 57 days after the last frost
Into an unheated greenhouse	14 May – 30 July; May outside: 8.9 °C at night, 19 °C by day; card 15–30 °C
First autumn frost	19 November, 168 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	13 August – 8 October
Days left for picking	98
Daylight	13:09 on 5 April, 16:16 on 4 June
Watering outdoors when fruiting (card)	every 4 days; the driest month, August, has 12 rainy days

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

Bell Pepper in Bonn: care after planting

Planted on 4 June: in the first weeks water every 5 days.

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

4 June — feed: balanced (NPK)
2 July — 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 Bonn 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 24.8 °C. Months that stay below 15 °C even by day on average: November (10.1 °C). Nights average below 15 °C in every month of the season, from 4.3 °C to 14.9 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.6	13.6	76	12	16:28
July	24.3	14.6	83	13	16:05
August	24.8	14.9	64	12	14:35
September	21	11.8	77	10	12:41
October	15.9	8.9	70	14	10:48
November	10.1	4.3	73	15	9:00

ERA5 2016–2025, Open-Meteo

Bell Pepper in nearby cities

Around Bonn, Cologne is 1 day earlier and Dortmund 1 day later.

City	Distance	Date	Difference
Cologne	25 km	3 June – 31 July	1 day earlier
Düsseldorf	60 km	3 June – 1 August	1 day earlier
Duisburg	81 km	3 June – 2 August	1 day earlier
Essen	81 km	3 June – 1 August	1 day earlier
Bochum	84 km	3 June – 31 July	1 day earlier
Dortmund	90 km	5 June – 27 July	1 day later

Where to buy bell pepper plants and seeds near Bonn

Buy plants ready to set out from 4 June to 30 July (from 14 May to 30 July for an unheated greenhouse); seed for raising your own is sown from 15 March to 31 May. Within 15 km of Bonn OpenStreetMap lists 32 garden centres, 4 farm-supply shops, 3 plant nurseries, 9 markets and 50 farm shops (collected 28 October 2026).

Baumschule Reinhardt GbR — garden centre
Peppenhovener Straße, 53359 Rheinbach · Sat 08:00–12:00 · 14 km · baumschulereinhardt.de
BAMboo-bamBOO — garden centre
Ampèrestraße 11, 53844 Troisdorf · 6 km · bamboo-bamboo.de
Fischer Baumschulen — garden centre
Rheinbacher Landstraße 2, 53340 Meckenheim · 14 km · fischer-baumschulen.de
Kissener's Gartenmarkt — garden centre
Mon–Fri 08:30–18:30; Sat 08:30–14:00; Sun, public holidays closed · 3 km · gartenmarkt-kissener.de

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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