When to plant watermelons in Providence: 31 May – 30 July

In Providence, watermelon: sow for seedlings from 12 April to 2 July; plant into a greenhouse from 10 May to 30 July; plant out into open ground from 31 May to 30 July.

Watermelon in Providence: soil, season and weather

In Providence the soil, not frost, sets the date: the last frost is over around 11 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 31 May, 50 days later.

Last spring frost	11 April
Top 7 cm of soil at 18 °C	31 May, 50 days after the last frost
Into an unheated greenhouse	10 May – 30 July; May outside: 10.1 °C at night, 20 °C by day; card 18–35 °C
First autumn frost	8 November, 161 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	29 July – 27 September
Days left for picking	102
Daylight	14:05 on 3 May, 14:59 on 31 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, June, has 11 rainy days

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

Watermelon in Providence: care after planting

Planted on 31 May: in the first weeks water every 5 days.

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

31 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 Providence during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 28.7 °C. Months that stay below 18 °C even by day on average: October (17.8 °C) and November (11.2 °C). Nights average below 18 °C in May, June and September–November (2.8–15.5 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	20	10.1	111	13	14:32
June	25.4	15.5	84	11	15:12
July	28.7	19.5	120	12	14:56
August	27.6	18.6	91	12	13:54
September	23.4	15.2	111	10	12:32
October	17.8	9.7	133	10	11:08
November	11.2	2.8	92	9	9:51

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Providence, New Haven is 5 days earlier and Concord 1 day later.

City	Distance	Date	Difference
Worcester (United States)	60 km	31 May – 30 July	same day
Boston	67 km	29 May – 4 August	2 days earlier
Hartford	106 km	31 May – 30 July	same day
Manchester (United States)	130 km	30 May – 24 July	1 day earlier
New Haven	138 km	26 May – 3 August	5 days earlier
Concord	155 km	1 June – 22 July	1 day later

Where to buy watermelon plants and seeds near Providence

Buy plants ready to set out from 31 May to 30 July (from 10 May to 30 July for an unheated greenhouse); seed for raising your own is sown from 12 April to 2 July. Within 15 km of Providence OpenStreetMap lists 6 garden centres, 1 plant nursery, 1 market and 8 farm shops (collected 20 October 2026).

Seven Arrows Farm — garden centre
13 km
Evergreen Tree & Landscape — garden centre
13 km
Tranquil Lake Nursery — plant nursery
12 km
Simply Seasonal — market
7 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