When to plant tomatoes in Plymouth: 21 June – 11 August

In Plymouth, tomato: sow for seedlings from 9 April to 20 June; plant into a greenhouse from 31 May to 11 August; plant out into open ground from 21 June to 11 August. For plants and seeds, the places nearby include Plymouth Garden Centre (garden centre, 4 km) and Plants Galore (garden centre, 6 km); addresses and opening hours are below.

Tomato in Plymouth: soil, season and weather

In Plymouth the soil, not frost, sets the date: the last frost is over around 1 March, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 21 June, 112 days later.

Last spring frost	1 March
Top 7 cm of soil at 15 °C	21 June, 112 days after the last frost
Into an unheated greenhouse	31 May – 11 August; May outside: 10.9 °C at night, 13.6 °C by day; card 16–27 °C
First autumn frost	1 December, 163 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	30 August – 20 October
Days left for picking	93
Daylight	14:39 on 30 April, 16:26 on 21 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, July, has 9 rainy days

Tomato in Plymouth: care after planting

Planted on 21 June: in the first weeks water every 4 days.

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

21 June — feed: balanced (NPK)
19 July — feed: nitrogen

Pests and diseases of tomato 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 Plymouth during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, August, averages 18 °C. Months that stay below 16 °C even by day on average: October (15.1 °C), November (12.6 °C) and December (11.2 °C). Nights average below 16 °C in every month of the season, from 8.8 °C to 15.7 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	16.1	13.6	60	10	16:24
July	17.9	15.3	54	9	16:01
August	18	15.7	64	10	14:33
September	17.1	14.5	93	13	12:41
October	15.1	12.7	140	16	10:49
November	12.6	10	141	17	9:02
December	11.2	8.8	138	18	8:03

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

All the nearest cities on our list plant tomato earlier than Plymouth; the closest date is in Exeter, 20 days earlier.

City	Distance	Date	Difference
Exeter	58 km	1 June – 7 August	20 days earlier
Swansea	140 km	24 May – 11 August	28 days earlier
Cardiff	141 km	26 May – 2 August	26 days earlier
Bristol	162 km	28 May – 2 August	24 days earlier
Southampton	202 km	23 May – 3 August	29 days earlier
Portsmouth	221 km	21 May – 11 August	31 days earlier

Where to buy tomato plants and seeds near Plymouth

Buy plants ready to set out from 21 June to 11 August (from 31 May to 11 August for an unheated greenhouse); seed for raising your own is sown from 9 April to 20 June. Within 15 km of Plymouth OpenStreetMap lists 8 garden centres, 1 farm-supply shop, 5 markets and 2 farm shops (collected 20 October 2026).

Endsleigh Garden Centre — garden centre
A38, PL21 9JL Ivybridge · Mon 09:30–18:00; Tue 09:00–18:00; Wed 09:00–20:00; Thu–Sat 09:00–18:00; Sun 10:30–16:30 · 14 km · g-l.co.uk
Plymouth Garden Centre — garden centre
Fort Austin Avenue, PL6 5NU Plymouth · 4 km · plymouthgardencentre.co.uk
Plants Galore — garden centre
Mon–Sat 08:00–17:30; Sun 10:00–16:30 · 6 km
The Plot — market
Union Street 80-84, PL1 3EZ Plymouth · Tue–Sat 11:00–17:00 · 1 km · nudge.community

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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