When to plant watermelons in Aberdeen: 19 July – 11 August

In Aberdeen, watermelon: sow for seedlings from 31 May to 14 July; plant into a greenhouse from 28 June to 11 August; plant out into open ground from 19 July to 11 August. For plants and seeds, the places nearby include Highland Moss (garden centre, 2 km) and Ben Reid Garden Centre (garden centre, 5 km); addresses and opening hours are below.

Watermelon in Aberdeen: soil, season and weather

In Aberdeen the soil, not frost, sets the date: the last frost is over around 10 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 19 July, 100 days later.

Last spring frost	10 April
Top 7 cm of soil at 18 °C	19 July, 100 days after the last frost
Into an unheated greenhouse	28 June – 11 August; June outside: 9.6 °C at night, 16.2 °C by day; card 18–35 °C
First autumn frost	20 November, 124 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	16 September – 9 October
Days left for picking	65
Daylight	17:56 on 21 June, 17:07 on 19 July
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 14 rainy days

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

Watermelon in Aberdeen: care after planting

Planted on 19 July: in the first weeks water every 5 days.

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

19 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 Aberdeen during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 17.8 °C. Months that stay below 18 °C even by day on average: July–November (9–17.8 °C). Nights average below 18 °C in every month of the season, from 4.4 °C to 11.5 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
July	17.8	11.5	103	18	17:19
August	17.7	11.4	74	15	15:18
September	15.8	9.9	68	14	12:51
October	12.7	7.6	108	16	10:27
November	9	4.4	87	15	8:06

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Aberdeen, Edinburgh is 13 days earlier and Dundee 2 days later.

City	Distance	Date	Difference
Dundee	91 km	21 July – 3 August	2 days later
Perth (United Kingdom)	115 km	19 July – 2 August	same day
Inverness	133 km	17 July – 4 August	2 days earlier
Edinburgh	148 km	6 July – 31 July	13 days earlier
Stirling	160 km	11 July – 31 July	8 days earlier
Glasgow	194 km	21 July – 2 August	2 days later

Where to buy watermelon plants and seeds near Aberdeen

Buy plants ready to set out from 19 July to 11 August (from 28 June to 11 August for an unheated greenhouse); seed for raising your own is sown from 31 May to 14 July. Within 15 km of Aberdeen OpenStreetMap lists 7 garden centres, 3 plant nurseries and 2 farm shops (collected 20 October 2026).

Ben Reid Garden Centre — garden centre
Countesswells Road, AB15 7AL Aberdeen · Mon–Sat 09:00–17:00; Sun 10:00–17:00 · 5 km · ben-reid.co.uk
Highland Moss — garden centre
Constitution Street 61 · Mon 12:00–16:00; Tue closed; Wed–Sun 10:00–18:00 · 2 km · highlandmoss.com
Foxlane Garden Centre — garden centre
Tarland Road, AB32 6JZ Westhill · 12 km · fox-lane.net
Dobbies — garden centre
Lang Stracht, AB15 6AX Aberdeen · 6 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.

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