When to plant watermelons in Hull: 27 June – 15 August

In Hull, watermelon: sow for seedlings from 9 May to 18 July; plant into a greenhouse from 6 June to 15 August; plant out into open ground from 27 June to 15 August.

Watermelon in Hull: soil, season and weather

In Hull the soil, not frost, sets the date: the last frost is over around 28 March, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 27 June, 91 days later.

Last spring frost	28 March
Top 7 cm of soil at 18 °C	27 June, 91 days after the last frost
Into an unheated greenhouse	6 June – 15 August; June outside: 11.1 °C at night, 18.6 °C by day; card 18–35 °C
First autumn frost	24 November, 150 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	25 August – 13 October
Days left for picking	91
Daylight	16:38 on 30 May, 17:04 on 27 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 13 rainy days

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

Watermelon in Hull: 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 Hull during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 20.8 °C. Months that stay below 18 °C even by day on average: October (14.5 °C) and November (10.2 °C). Nights average below 18 °C in every month of the season, from 4.9 °C to 13 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	18.6	11.1	68	12	17:03
July	20.8	13	77	14	16:36
August	20.8	13	67	13	14:53
September	18.3	11	67	12	12:46
October	14.5	8.5	74	13	10:39
November	10.2	4.9	70	12	8:37

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Hull, Nottingham is 7 days earlier and Sheffield 2 days later.

City	Distance	Date	Difference
York	54 km	26 June – 5 August	1 day earlier
Lincoln (United Kingdom)	58 km	25 June – 10 August	2 days earlier
Leeds	80 km	25 June – 14 August	2 days earlier
Sheffield	85 km	29 June – 13 August	2 days later
Bradford	93 km	27 June – 9 August	same day
Nottingham	103 km	20 June – 14 August	7 days earlier

Where to buy watermelon plants and seeds near Hull

Buy plants ready to set out from 27 June to 15 August (from 6 June to 15 August for an unheated greenhouse); seed for raising your own is sown from 9 May to 18 July. Within 15 km of Hull OpenStreetMap lists 8 garden centres, 1 plant nursery, 4 markets and 1 farm shop (collected 20 October 2026).

Cherry Lane Garden Centre — garden centre
14 km
Skirlaugh Garden & Aquatic Centre — garden centre
11 km
Trinity Market — market
1 km
Corn Hill — market
13 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