When to plant watermelons in Newcastle upon Tyne: 26 June – 11 August

In Newcastle upon Tyne, watermelon: sow for seedlings from 8 May to 14 July; plant into a greenhouse from 5 June to 11 August; plant out into open ground from 26 June to 11 August. For plants and seeds, the places nearby include Green Fingers Garden Centre (garden centre, 11 km) and Lintzford Garden Centre (garden centre, 13 km); addresses and opening hours are below.

Watermelon in Newcastle upon Tyne: soil, season and weather

In Newcastle upon Tyne the soil, not frost, sets the date: the last frost is over around 8 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 26 June, 79 days later.

Last spring frost	8 April
Top 7 cm of soil at 18 °C	26 June, 79 days after the last frost
Into an unheated greenhouse	5 June – 11 August; June outside: 10.7 °C at night, 17.1 °C by day; card 18–35 °C
First autumn frost	20 November, 147 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	24 August – 9 October
Days left for picking	88
Daylight	16:50 on 29 May, 17:21 on 26 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, June, has 12 rainy days

The same dates in Newcastle upon Tyne hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Newcastle upon Tyne: care after planting

Planted on 26 June: in the first weeks water every 5 days.

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

26 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 Newcastle upon Tyne during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 19 °C. Months that stay below 18 °C even by day on average: June and September–November (9.7–17.1 °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
June	17.1	10.7	69	12	17:20
July	19	12.6	88	16	16:50
August	18.9	12.5	72	15	15:02
September	16.8	10.6	73	13	12:48
October	13.5	8.3	85	15	10:35
November	9.7	5	77	15	8:27

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Newcastle upon Tyne, Leeds is 1 day earlier and Carlisle 19 days later.

City	Distance	Date	Difference
Carlisle	86 km	15 July – 6 August	19 days later
York	118 km	26 June – 5 August	same day
Leeds	131 km	25 June – 14 August	1 day earlier
Bradford	133 km	27 June – 9 August	1 day later
Edinburgh	147 km	6 July – 31 July	10 days later
Hull	161 km	27 June – 15 August	1 day later

Where to buy watermelon plants and seeds near Newcastle upon Tyne

Buy plants ready to set out from 26 June to 11 August (from 5 June to 11 August for an unheated greenhouse); seed for raising your own is sown from 8 May to 14 July. Within 15 km of Newcastle upon Tyne OpenStreetMap lists 30 garden centres, 6 markets and 5 farm shops (collected 20 October 2026).

Grainger Market — market
1 km
Community Garden produce stall — farm shop
10 km
Green Fingers Garden Centre — garden centre
Western Approach, NE33 5QY South Shields · Mon–Sat 09:00–17:00; Sun 10:00–16:00 · 11 km · greenfingersgardencentre.co.uk
Lintzford Garden Centre — garden centre
Lintzford Road, NE39 1DG Rowlands Gill · Mon–Fri 09:00–22:00; Sat–Sun 09:00–22:00 · 13 km · lintzfordgardencentre.co.uk

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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