When to plant bell peppers in Southampton: 17 June – 3 August

In Southampton, bell pepper: sow for seedlings from 28 March to 4 June; plant into a greenhouse from 27 May to 3 August; plant out into open ground from 17 June to 3 August. For plants and seeds, the places nearby include New Forest Garden Machinery (garden centre, 8 km) and Garsons (garden centre, 13 km); addresses and opening hours are below.

Bell Pepper in Southampton: soil, season and weather

In Southampton the soil, not frost, sets the date: the last frost is over around 4 April, but the top 7 cm of soil reaches 18 °C — the minimum on the bell pepper card — only around 17 June, 74 days later.

Last spring frost	4 April
Top 7 cm of soil at 18 °C	17 June, 74 days after the last frost
Into an unheated greenhouse	27 May – 3 August; May outside: 8.2 °C at night, 17.4 °C by day; card 15–30 °C
First autumn frost	23 November, 159 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	26 August – 12 October
Days left for picking	89
Daylight	13:59 on 18 April, 16:31 on 17 June
Watering outdoors when fruiting (card)	every 4 days; the driest month, July, has 10 rainy days

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

Bell Pepper in Southampton: care after planting

Planted on 17 June: in the first weeks water every 5 days.

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

17 June — feed: balanced (NPK)
15 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 Southampton during the bell pepper season

No month of the season averages above the bell pepper card's 15–30 °C by day; the warmest, July, averages 22.3 °C. Months that stay below 15 °C even by day on average: November (11.1 °C). Nights average below 15 °C in every month of the season, from 5.2 °C to 13.5 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	20.5	11.5	59	11	16:30
July	22.3	13.5	54	10	16:06
August	21.8	13.3	60	10	14:36
September	19.2	11.2	73	11	12:42
October	15.4	8.8	100	13	10:47
November	11.1	5.2	86	13	8:58

ERA5 2016–2025, Open-Meteo

Bell Pepper in nearby cities

Around Southampton, London is 5 days earlier and Brighton 33 days later.

City	Distance	Date	Difference
Portsmouth	24 km	16 June – 11 August	1 day earlier
Brighton	89 km	20 July – 11 August	33 days later
Oxford	95 km	23 June – 3 August	6 days later
Bristol	103 km	19 June – 2 August	2 days later
London	111 km	12 June – 3 August	5 days earlier
Cardiff	140 km	24 June – 2 August	7 days later

Where to buy bell pepper plants and seeds near Southampton

Buy plants ready to set out from 17 June to 3 August (from 27 May to 3 August for an unheated greenhouse); seed for raising your own is sown from 28 March to 4 June. Within 15 km of Southampton OpenStreetMap lists 28 garden centres, 15 plant nurseries, 1 market and 10 farm shops (collected 20 October 2026).

Garsons — garden centre
Fontley Road, PO15 6QX Fareham · 13 km · garsons.co.uk
Abbey Garden Centre — garden centre
Mill Lane, PO15 5RB · 13 km · abbeygardencentre.co.uk
New Forest Garden Machinery — garden centre
Salisbury Road 316-318, SO40 3ND Totton · 8 km
Hillier Garden Centre Braishfield — garden centre
Jermyns Lane, SO51 0QA Romsey · 13 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