When to plant peas in Portsmouth: 11 February – 18 September

In Portsmouth, peas: sow straight into the bed from 11 February to 18 September.

Peas in Portsmouth: soil, season and weather

Peas tolerates light frost, so it goes in three weeks before the last frost (4 March); the top 7 cm of soil averages its minimum of 4 °C already in the first week of January.

Last spring frost	4 March
Top 7 cm of soil at 4 °C	already in the first week of January
First autumn frost	1 December, 293 days after the start
Days in the bed to the first harvest (card)	74
First harvest, if planted in this window	26 April – 1 December
Days left for picking	219
Daylight	9:48 on 11 February
Watering outdoors when fruiting (card)	every 3 days; the driest month, April, has 9 rainy days

Peas in Portsmouth: care after planting

Planted on 11 February: in the first weeks water every 6 days.

Pests and diseases of peas to watch for:

Weather in Portsmouth during the peas season

About 799 mm of rain falls in the season; April is the driest month (45 mm) and October the wettest (108 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
February	9	4.4	68	12	10:02
March	10.3	5.1	67	13	11:49
April	12.8	6.1	45	9	13:47
May	16.1	9.4	51	11	15:30
June	19	12.8	59	11	16:29
July	20.7	14.9	60	12	16:05
August	20.7	14.8	64	11	14:36
September	18.9	13	79	11	12:42
October	15.5	10.8	108	14	10:47
November	11.7	7.1	100	14	8:59
December	9.7	5.6	98	14	7:59

ERA5 2016–2025, Open-Meteo

Peas in nearby cities

Around Portsmouth, Brighton is 24 days earlier and Bristol 38 days later.

City	Distance	Date	Difference
Southampton	24 km	14 March – 10 September	31 days later
Brighton	67 km	18 January – 18 September	24 days earlier
London	103 km	14 March – 10 September	31 days later
Oxford	105 km	13 March – 10 September	30 days later
Bristol	127 km	21 March – 9 September	38 days later
Cardiff	164 km	4 March – 9 September	21 days later

Where to buy peas seeds in Portsmouth

Seeds go straight into the bed from 11 February to 18 September; buy them before that. Within 15 km of Portsmouth OpenStreetMap lists 16 garden centres, 4 plant nurseries, 5 markets and 8 farm shops (collected 28 October 2026).

The Coastal Gardener — plant nursery
12 km · thecoastalgardener.co.uk
Plantation — plant nursery
14 km
Tree Plantation — plant nursery
15 km
McCarthys — farm shop
14 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