When to plant cucumbers in Brighton: 20 July – 16 September

In Brighton, cucumber: sow for seedlings from 1 June to 19 August; plant into a greenhouse from 29 June to 16 September; plant out into open ground from 20 July to 16 September. For plants and seeds, the places nearby include Bonsai Ko (garden centre, 0 km) and Hugo & Green (garden centre, 1 km); addresses and opening hours are below.

Cucumber in Brighton: soil, season and weather

In Brighton the soil, not frost, sets the date: the last frost is over around 8 February, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 20 July, 162 days later.

Last spring frost	8 February
Top 7 cm of soil at 18 °C	20 July, 162 days after the last frost
Into an unheated greenhouse	29 June – 16 September; June outside: 13.8 °C at night, 16.5 °C by day; card 18–25 °C
First autumn frost	1 December, 134 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	23 August – 20 October
Days left for picking	100
Daylight	16:31 on 22 June, 15:54 on 20 July
Watering outdoors when fruiting (card)	every 2 days; the driest month, July, has 10 rainy days

The same dates in Brighton hold for Bell Pepper, Eggplant, Zucchini, Pumpkin and Watermelon.

Cucumber in Brighton: care after planting

Planted on 20 July: in the first weeks water every 4 days.

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

27 July — feed: nitrogen

Pests and diseases of cucumber 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 Brighton during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, August, averages 19.2 °C. Months that stay below 18 °C even by day on average: October (15.8 °C), November (12.3 °C) and December (10.3 °C). Nights average below 18 °C in every month of the season, from 7.6 °C to 16.5 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
July	18.6	16	53	10	16:06
August	19.2	16.5	63	10	14:36
September	18.2	15.1	87	11	12:42
October	15.8	12.9	131	15	10:47
November	12.3	9.3	121	15	8:59
December	10.3	7.6	106	16	7:59

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

All the nearest cities on our list plant cucumber earlier than Brighton; the closest date is in Oxford, 27 days earlier.

City	Distance	Date	Difference
Portsmouth	67 km	16 June – 16 September	34 days earlier
London	76 km	12 June – 8 September	38 days earlier
Southampton	89 km	17 June – 8 September	33 days earlier
Oxford	129 km	23 June – 8 September	27 days earlier
Le Havre	150 km	11 June – 27 September	39 days earlier
Cambridge	153 km	17 June – 9 September	33 days earlier

Where to buy cucumber plants and seeds near Brighton

Buy plants ready to set out from 20 July to 16 September (from 29 June to 16 September for an unheated greenhouse); seed for raising your own is sown from 1 June to 19 August. Within 15 km of Brighton OpenStreetMap lists 18 garden centres, 6 plant nurseries, 5 markets and 2 farm shops (collected 20 October 2026).

Bonsai Ko — garden centre
Sydney Street 45 · 0 km · bonsai-ko.co.uk
Hugo & Green — garden centre
Hanningtons Lane 3, Brighton · 1 km
Trug Ltd. — garden centre
High Street 110, BN6 9PU Hurstpierpoint · 12 km
Gardner Scardifield Garden Centre — garden centre
South Street, BN15 8AE Lancing · 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.

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