When to plant watermelons in Wrexham: 5 July – 14 August

In Wrexham, watermelon: sow for seedlings from 17 May to 17 July; plant into a greenhouse from 14 June to 14 August; plant out into open ground from 5 July to 14 August.

Watermelon in Wrexham: soil, season and weather

In Wrexham the soil, not frost, sets the date: the last frost is over around 7 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 5 July, 89 days later.

Last spring frost	7 April
Top 7 cm of soil at 18 °C	5 July, 89 days after the last frost
Into an unheated greenhouse	14 June – 14 August; June outside: 11.1 °C at night, 19 °C by day; card 18–35 °C
First autumn frost	23 November, 141 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	2 September – 12 October
Days left for picking	82
Daylight	16:45 on 7 June, 16:47 on 5 July
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 13 rainy days

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

Watermelon in Wrexham: care after planting

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

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

5 July — 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 Wrexham during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 20.3 °C. Months that stay below 18 °C even by day on average: September (17.4 °C), October (13.8 °C) and November (9.7 °C). Nights average below 18 °C in every month of the season, from 5 °C to 12.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
July	20.3	12.6	81	13	16:28
August	19.8	12.6	68	13	14:49
September	17.4	10.8	94	14	12:45
October	13.8	8.2	94	15	10:41
November	9.7	5	84	14	8:43

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon earlier than Wrexham; the closest date is in Sheffield, 6 days earlier.

City	Distance	Date	Difference
Liverpool	40 km	17 June – 17 August	18 days earlier
Stoke-on-Trent	54 km	20 June – 6 August	15 days earlier
Manchester	69 km	28 June – 5 August	7 days earlier
Birmingham	97 km	20 June – 10 August	15 days earlier
Derby	102 km	22 June – 13 August	13 days earlier
Sheffield	108 km	29 June – 13 August	6 days earlier

Where to buy watermelon plants and seeds near Wrexham

Buy plants ready to set out from 5 July to 14 August (from 14 June to 14 August for an unheated greenhouse); seed for raising your own is sown from 17 May to 17 July. Within 15 km of Wrexham OpenStreetMap lists 6 garden centres, 2 farm-supply shops, 1 plant nursery, 2 markets and 5 farm shops (collected 28 October 2026).

Pentre Nursery — plant nursery
14 km
Jones Brothers Farm Shop — farm supply
2 km
Butchers' Market — market
1 km
Swan's Farm Shop — farm shop
11 km · swansfarmshop.com

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