When to plant watermelons in Piacenza: 11 May – 22 August

In Piacenza, watermelon: sow for seedlings from 23 March to 25 July; plant into a greenhouse from 20 April to 22 August; plant out into open ground from 11 May to 22 August. For plants and seeds, the places nearby include Il Vivaio (plant nursery, 4 km) and Vivaio Maserati (plant nursery, 10 km); addresses and opening hours are below.

Watermelon in Piacenza: soil, season and weather

In Piacenza the soil, not frost, sets the date: the last frost is over around 20 March, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 11 May, 52 days later.

Last spring frost	20 March
Top 7 cm of soil at 18 °C	11 May, 52 days after the last frost
Into an unheated greenhouse	20 April – 22 August; April outside: 7.9 °C at night, 19.3 °C by day; card 18–35 °C
First autumn frost	1 December, 204 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	9 July – 20 October
Days left for picking	145
Daylight	13:22 on 13 April, 14:41 on 11 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 9 rainy days

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

Watermelon in Piacenza: care after planting

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

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

11 May — 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 Piacenza during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 31.3 °C. Months that stay below 18 °C even by day on average: November (12.7 °C) and December (8.1 °C). Nights average below 18 °C in May and September–December (1.4–15.6 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	22.6	12.6	128	15	14:50
June	28.9	18	72	9	15:36
July	31.3	20.1	55	9	15:18
August	31.2	20.1	79	10	14:07
September	25.8	15.6	74	8	12:35
October	19.9	11	104	10	11:02
November	12.7	5.6	96	10	9:34
December	8.1	1.4	81	8	8:47

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon later than Piacenza; the closest date is in Milan, 1 day later.

City	Distance	Date	Difference
Parma	58 km	19 May – 20 August	8 days later
Milan	60 km	12 May – 21 August	1 day later
Brescia	68 km	15 May – 19 August	4 days later
Bergamo	72 km	31 May – 9 August	20 days later
Mantua	87 km	14 May – 19 August	3 days later
Genoa	93 km	20 June – 17 August	40 days later

Where to buy watermelon plants and seeds near Piacenza

Buy plants ready to set out from 11 May to 22 August (from 20 April to 22 August for an unheated greenhouse); seed for raising your own is sown from 23 March to 25 July. Within 15 km of Piacenza OpenStreetMap lists 2 garden centres, 7 plant nurseries, 3 markets and 1 farm shop (collected 27 October 2026).

Mercato Coperto — market
1 km
Mercato Coperto — market
1 km
Il Vivaio — plant nursery
Via Ragazzi del 99, San Bonico · 4 km
Vivaio Maserati — plant nursery
Ponte Vangaro, 29020 Ponte Vangaro · 10 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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