When to plant zucchini in Plymouth: 17 July – 14 September

In Plymouth, zucchini: sow for seedlings from 5 June to 24 August; plant into a greenhouse from 26 June to 14 September; plant out into open ground from 17 July to 14 September. 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.

Zucchini 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 18 °C — the minimum on the zucchini card — only around 17 July, 138 days later.

Last spring frost	1 March
Top 7 cm of soil at 18 °C	17 July, 138 days after the last frost
First autumn frost	1 December, 137 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	22 August – 20 October
Days left for picking	101
Daylight	16:25 on 26 June, 15:57 on 17 July
Watering outdoors when fruiting (card)	every 3 days; the driest month, July, has 9 rainy days

The same dates in Plymouth hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.

Zucchini in Plymouth: care after planting

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

Pests and diseases of zucchini to watch for:

Weather in Plymouth during the zucchini season

About 630 mm of rain falls in the season; July is the driest month (54 mm) and November the wettest (141 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
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

Zucchini in nearby cities

All the nearest cities on our list plant zucchini earlier than Plymouth; the closest date is in Cardiff, 23 days earlier.

City	Distance	Date	Difference
Exeter	58 km	23 June – 10 September	24 days earlier
Swansea	140 km	21 June – 14 September	26 days earlier
Cardiff	141 km	24 June – 5 September	23 days earlier
Bristol	162 km	19 June – 5 September	28 days earlier
Southampton	202 km	17 June – 6 September	30 days earlier
Portsmouth	221 km	16 June – 14 September	31 days earlier

Where to buy zucchini plants and seeds near Plymouth

Buy plants ready to set out from 17 July to 14 September (from 26 June to 14 September for an unheated greenhouse); seed for raising your own is sown from 5 June to 24 August. 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.

Questions