When to plant watermelons in Stirling: 11 July – 31 July

In Stirling, watermelon: sow for seedlings from 23 May to 3 July; plant into a greenhouse from 20 June to 31 July; plant out into open ground from 11 July to 31 July.

Watermelon in Stirling: soil, season and weather

In Stirling the soil, not frost, sets the date: the last frost is over around 29 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 11 July, 73 days later.

Last spring frost	29 April
Top 7 cm of soil at 18 °C	11 July, 73 days after the last frost
Into an unheated greenhouse	20 June – 31 July; June outside: 9.1 °C at night, 16.4 °C by day; card 18–35 °C
First autumn frost	9 November, 121 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	8 September – 28 September
Days left for picking	62
Daylight	17:35 on 13 June, 17:15 on 11 July
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 16 rainy days

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

Watermelon in Stirling: care after planting

Planted on 11 July: in the first weeks water every 5 days.

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

11 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 Stirling during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 17.6 °C. Months that stay below 18 °C even by day on average: July–November (7.7–17.6 °C). Nights average below 18 °C in every month of the season, from 2.9 °C to 10.7 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
July	17.6	10.7	112	18	17:05
August	17.1	10.5	135	18	15:10
September	15	8.8	119	17	12:50
October	11.5	6.3	143	17	10:31
November	7.7	2.9	111	16	8:16

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Stirling, Edinburgh is 5 days earlier and Glasgow 10 days later.

City	Distance	Date	Difference
Glasgow	35 km	21 July – 2 August	10 days later
Perth (United Kingdom)	44 km	19 July – 2 August	8 days later
Edinburgh	50 km	6 July – 31 July	5 days earlier
Dundee	71 km	21 July – 3 August	10 days later
Carlisle	151 km	15 July – 6 August	4 days later
Inverness	152 km	17 July – 4 August	6 days later

Where to buy watermelon plants and seeds near Stirling

Buy plants ready to set out from 11 July to 31 July (from 20 June to 31 July for an unheated greenhouse); seed for raising your own is sown from 23 May to 3 July. Within 15 km of Stirling OpenStreetMap lists 6 garden centres, 1 plant nursery and 3 farm shops (collected 28 October 2026).

Bonnyview Garden Centre & Plant Nursery — garden centre
14 km
Woodside Garden Store — garden centre
15 km
Gardens and Grounds — plant nursery
4 km · propman.stir.ac.uk
Smiddy Farm Shop, Butchery and Cafe — farm shop
9 km · blairdrummondsmiddy.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.

Questions