When to plant watermelons in Dundee: 21 July – 3 August

In Dundee, watermelon: sow for seedlings from 2 June to 6 July; plant into a greenhouse from 30 June to 3 August; plant out into open ground from 21 July to 3 August. For plants and seeds, the places nearby include Mill of Inverarity Farm Shop (farm shop, 14 km); addresses and opening hours are below.

Watermelon in Dundee: soil, season and weather

In Dundee the soil, not frost, sets the date: the last frost is over around 28 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 21 July, 84 days later. 114 days separate planting out (21 July) from the first autumn frost (12 November); the card's 59 days to the first harvest leave 55 for picking, so a start 7 weeks late would still fit.

Last spring frost	28 April
Top 7 cm of soil at 18 °C	21 July, 84 days after the last frost
Into an unheated greenhouse	30 June – 3 August; June outside: 9.3 °C at night, 16.6 °C by day; card 18–35 °C
First autumn frost	12 November, 114 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	18 September – 1 October
Days left for picking	55
Daylight	17:45 on 23 June, 16:51 on 21 July
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 13 rainy days

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

Watermelon in Dundee: care after planting

Planted on 21 July: in the first weeks water every 5 days.

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

21 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 Dundee during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 18.3 °C. Months that stay below 18 °C even by day on average: August–November (8.2–17.8 °C). Nights average below 18 °C in every month of the season, from 3.1 °C to 11.1 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
July	18.3	11.1	87	16	17:10
August	17.8	10.9	87	14	15:12
September	15.7	9.1	71	13	12:50
October	12.1	6.5	114	15	10:29
November	8.2	3.1	88	13	8:13

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

1 of the nearest cities share Dundee's date.

City	Distance	Date	Difference
Perth (United Kingdom)	29 km	19 July – 2 August	2 days earlier
Edinburgh	59 km	6 July – 31 July	15 days earlier
Stirling	71 km	11 July – 31 July	10 days earlier
Aberdeen	91 km	19 July – 11 August	2 days earlier
Glasgow	104 km	21 July – 2 August	same day
Inverness	135 km	17 July – 4 August	4 days earlier

Where to buy watermelon plants and seeds near Dundee

Buy plants ready to set out from 21 July to 3 August (from 30 June to 3 August for an unheated greenhouse); seed for raising your own is sown from 2 June to 6 July. Within 15 km of Dundee OpenStreetMap lists 4 garden centres, 1 farm-supply shop, 1 plant nursery, 2 markets and 3 farm shops (collected 20 October 2026).

Dundee Farmers' Market — market
City Square, DD1 3BG Dundee · Sat [3] 09:00–16:00; Jan closed · 1 km · dundeesfarmersmarket.wordpress.com
Errol Sunday Market — market
Sun 10:00–16:00 · 15 km · errolsundaymarket.co.uk
Mill of Inverarity Farm Shop — farm shop
Mill Of Inverarity, DD8 2JN Forfar · 14 km
Turriff Broomhill Nurseries — garden centre
5 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