When to plant zucchini in Cambridge: 17 June – 7 September

In Cambridge, zucchini: sow for seedlings from 6 May to 17 August; plant into a greenhouse from 27 May to 7 September; plant out into open ground from 17 June to 7 September.

Zucchini in Cambridge: soil, season and weather

In Cambridge the soil, not frost, sets the date: the last frost is over around 3 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 17 June, 75 days later.

Last spring frost	3 April
Top 7 cm of soil at 18 °C	17 June, 75 days after the last frost
First autumn frost	24 November, 160 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	23 July – 13 October
Days left for picking	124
Daylight	16:14 on 27 May, 16:45 on 17 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 10 rainy days

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

Zucchini in Cambridge: care after planting

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

Pests and diseases of zucchini to watch for:

Weather in Cambridge during the zucchini season

About 366 mm of rain falls in the season; August is the driest month (50 mm) and October the wettest (71 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	20.6	11.7	57	10	16:44
July	22.5	13.8	66	12	16:19
August	22.5	13.6	50	10	14:44
September	19.8	11.4	62	10	12:43
October	15.3	8.6	71	11	10:43
November	10.6	4.9	60	11	8:49

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Cambridge, London is 5 days earlier and Norwich 10 days later.

City	Distance	Date	Difference
Ipswich	73 km	14 June – 12 September	3 days earlier
London	79 km	12 June – 6 September	5 days earlier
Norwich	93 km	27 June – 11 September	10 days later
Leicester	98 km	21 June – 2 September	4 days later
Oxford	107 km	23 June – 6 September	6 days later
Coventry	113 km	21 June – 31 August	4 days later

Where to buy zucchini plants and seeds near Cambridge

Buy plants ready to set out from 17 June to 7 September (from 27 May to 7 September for an unheated greenhouse); seed for raising your own is sown from 6 May to 17 August. Within 15 km of Cambridge OpenStreetMap lists 11 garden centres, 1 farm-supply shop, 2 markets and 7 farm shops (collected 20 October 2026).

Oaklands Nursery — garden centre
5 km
Ernest Doe & Sons Ltd — farm supply
8 km
Willow Grange Farm Shop — farm shop
14 km
Hackers Farm Shop — farm shop
7 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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