When to plant watermelons in Waterford: 28 June – 11 August

In Waterford, watermelon: sow for seedlings from 10 May to 14 July; plant into a greenhouse from 7 June to 11 August; plant out into open ground from 28 June to 11 August.

Watermelon in Waterford: soil, season and weather

In Waterford the soil, not frost, sets the date: the last frost is over around 3 March, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 28 June, 117 days later.

Last spring frost	3 March
Top 7 cm of soil at 18 °C	28 June, 117 days after the last frost
Into an unheated greenhouse	7 June – 11 August; June outside: 11 °C at night, 17.7 °C by day; card 18–35 °C
First autumn frost	20 November, 145 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	26 August – 9 October
Days left for picking	86
Daylight	16:24 on 31 May, 16:45 on 28 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 13 rainy days

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

Watermelon in Waterford: care after planting

Planted on 28 June: in the first weeks water every 5 days.

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

28 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 Waterford during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 19.2 °C. Months that stay below 18 °C even by day on average: June and September–November (10.7–17.7 °C). Nights average below 18 °C in every month of the season, from 5.8 °C to 12.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	17.7	11	77	13	16:45
July	19.2	12.6	76	13	16:20
August	18.9	12.6	88	13	14:44
September	16.9	10.7	115	15	12:44
October	13.9	8.8	131	15	10:43
November	10.7	5.8	120	15	8:49

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon later than Waterford; the closest date is in Limerick, 8 days later.

City	Distance	Date	Difference
Kilkenny	44 km	15 July – 11 August	17 days later
Cork	101 km	15 July – 12 August	17 days later
Limerick	112 km	6 July – 12 August	8 days later
Dublin	134 km	16 July – 15 August	18 days later
Athlone	141 km	13 July – 17 August	15 days later
Galway	172 km	13 July – 19 August	15 days later

Where to buy watermelon plants and seeds near Waterford

Buy plants ready to set out from 28 June to 11 August (from 7 June to 11 August for an unheated greenhouse); seed for raising your own is sown from 10 May to 14 July. Within 15 km of Waterford OpenStreetMap lists 3 garden centres, 6 farm-supply shops, 4 plant nurseries and 1 market (collected 20 October 2026).

Tirlán FarmLife — farm supply
11 km
Tirlán FarmLife — farm supply
12 km
Tirlán CountryLife — farm supply
12 km
Shelburne Co-op Society Ltd — farm supply
12 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