When to plant watermelons in Norwich: 27 June – 19 August

In Norwich, watermelon: sow for seedlings from 9 May to 22 July; plant into a greenhouse from 6 June to 19 August; plant out into open ground from 27 June to 19 August. For plants and seeds, the places nearby include The Egg Shed (farm shop, 14 km); addresses and opening hours are below.

Watermelon in Norwich: soil, season and weather

In Norwich the soil, not frost, sets the date: the last frost is over around 31 March, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 27 June, 88 days later.

Last spring frost	31 March
Top 7 cm of soil at 18 °C	27 June, 88 days after the last frost
Into an unheated greenhouse	6 June – 19 August; June outside: 11.3 °C at night, 19.6 °C by day; card 18–35 °C
First autumn frost	28 November, 154 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	25 August – 17 October
Days left for picking	95
Daylight	16:26 on 30 May, 16:50 on 27 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 11 rainy days

The same dates in Norwich hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Norwich: care after planting

Planted on 27 June: in the first weeks water every 5 days.

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

27 June — feed: balanced (NPK)

Pests and diseases of watermelon 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 Norwich during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 21.6 °C. Months that stay below 18 °C even by day on average: October (14.9 °C) and November (10.4 °C). Nights average below 18 °C in every month of the season, from 5.1 °C to 13.3 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	19.6	11.3	66	12	16:49
July	21.5	13	73	13	16:24
August	21.6	13.3	55	11	14:46
September	19	11.3	63	10	12:44
October	14.9	8.7	76	13	10:42
November	10.4	5.1	63	11	8:46

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

1 of the nearest cities share Norwich's date.

City	Distance	Date	Difference
Ipswich	64 km	14 June – 20 August	13 days earlier
Cambridge	93 km	17 June – 15 August	10 days earlier
Lincoln (United Kingdom)	140 km	25 June – 10 August	2 days earlier
London	158 km	12 June – 14 August	15 days earlier
Leicester	164 km	21 June – 10 August	6 days earlier
Hull	165 km	27 June – 15 August	same day

Where to buy watermelon plants and seeds near Norwich

Buy plants ready to set out from 27 June to 19 August (from 6 June to 19 August for an unheated greenhouse); seed for raising your own is sown from 9 May to 22 July. Within 15 km of Norwich OpenStreetMap lists 20 garden centres, 1 farm-supply shop, 1 plant nursery, 1 market and 14 farm shops (collected 20 October 2026).

The Egg Shed — farm shop · sells: eggs
South Burlingham Road · 14 km
Next — garden centre
8 km · next.co.uk
Forsters Garden Centre — garden centre
5 km
Bibbin Brothers Roadside Nurseries — garden centre
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.

Questions