When to plant pumpkins in Southampton: 17 June – 29 July

In Southampton, pumpkin: sow for seedlings from 15 April to 17 June; plant into a greenhouse from 27 May to 29 July; plant out into open ground from 17 June to 29 July. For plants and seeds, the places nearby include Pickwell Farm Shop (farm shop, 5 km); addresses and opening hours are below.

Pumpkin 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 pumpkin 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
First autumn frost	23 November, 159 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	31 August – 12 October
Days left for picking	84
Daylight	15:02 on 6 May, 16:31 on 17 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 10 rainy days

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

Pumpkin in Southampton: care after planting

Planted on 17 June: in the first weeks water every 4 days.

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

8 July — feed: nitrogen

Pests and diseases of pumpkin 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 pumpkin season

About 432 mm of rain falls in the season; July is the driest month (54 mm) and October the wettest (100 mm).

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

Pumpkin in nearby cities

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

City	Distance	Date	Difference
Portsmouth	24 km	16 June – 6 August	1 day earlier
Brighton	89 km	20 July – 6 August	33 days later
Oxford	95 km	23 June – 29 July	6 days later
Bristol	103 km	19 June – 28 July	2 days later
London	111 km	12 June – 29 July	5 days earlier
Cardiff	140 km	24 June – 28 July	7 days later

Where to buy pumpkin plants and seeds near Southampton

Buy plants ready to set out from 17 June to 29 July (from 27 May to 29 July for an unheated greenhouse); seed for raising your own is sown from 15 April to 17 June. Within 15 km of Southampton OpenStreetMap lists 28 garden centres, 15 plant nurseries, 1 market and 10 farm shops (collected 20 October 2026).

Pickwell Farm Shop — farm shop
Grange Rd, SO31 8GD Southampton · 5 km
Hillier Nurseries Woodlands — plant nursery
13 km · hillier.co.uk
World Garden Plants — plant nursery
15 km · worldgardenplants.com
Hillier Trees Broadmead Nursery — plant nursery · sells: trees, large_plants, shrubs, saplings
12 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