When to plant watermelons in Lincoln (United Kingdom): 25 June – 10 August

In Lincoln (United Kingdom), watermelon: sow for seedlings from 7 May to 13 July; plant into a greenhouse from 4 June to 10 August; plant out into open ground from 25 June to 10 August.

Watermelon in Lincoln (United Kingdom): soil, season and weather

In Lincoln (United Kingdom) the soil, not frost, sets the date: the last frost is over around 1 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 25 June, 85 days later.

Last spring frost	1 April
Top 7 cm of soil at 18 °C	25 June, 85 days after the last frost
Into an unheated greenhouse	4 June – 10 August; June outside: 11.1 °C at night, 19.6 °C by day; card 18–35 °C
First autumn frost	19 November, 147 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	23 August – 8 October
Days left for picking	88
Daylight	16:27 on 28 May, 16:58 on 25 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 11 rainy days

The same dates in Lincoln (United Kingdom) hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Lincoln (United Kingdom): care after planting

Planted on 25 June: in the first weeks water every 5 days.

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

25 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 Lincoln (United Kingdom) during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 21.7 °C. Months that stay below 18 °C even by day on average: October (14.7 °C) and November (10.2 °C). Nights average below 18 °C in every month of the season, from 4.5 °C to 13 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	19.6	11.1	69	11	16:57
July	21.7	13	78	14	16:30
August	21.5	12.9	61	11	14:50
September	18.9	10.8	66	12	12:45
October	14.7	8.3	78	12	10:40
November	10.2	4.5	66	11	8:41

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Lincoln (United Kingdom), Nottingham is 5 days earlier and Sheffield 4 days later.

City	Distance	Date	Difference
Nottingham	51 km	20 June – 14 August	5 days earlier
Hull	58 km	27 June – 15 August	2 days later
Sheffield	64 km	29 June – 13 August	4 days later
Derby	72 km	22 June – 13 August	3 days earlier
Leicester	77 km	21 June – 10 August	4 days earlier
York	89 km	26 June – 5 August	1 day later

Where to buy watermelon plants and seeds near Lincoln (United Kingdom)

Buy plants ready to set out from 25 June to 10 August (from 4 June to 10 August for an unheated greenhouse); seed for raising your own is sown from 7 May to 13 July. Within 15 km of Lincoln (United Kingdom) OpenStreetMap lists 4 garden centres, 1 market and 2 farm shops (collected 28 October 2026).

Living Stone — garden centre
8 km
Cherry Tree Garden Centre — garden centre
7 km
Doddington Farm Shop — farm shop
8 km · doddingtonhall.com
Church Farm Shop — farm shop
15 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