When to plant watermelons in Worcester (United States): 31 May – 30 July

In Worcester (United States), 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. For plants and seeds, the places nearby include The Plant Ward (garden centre, 4 km) and Busy Bee Landscape & Garden Center (garden centre, 14 km); addresses and opening hours are below.

Watermelon in Worcester (United States): soil, season and weather

In Worcester (United States) 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: 9.4 °C at night, 19.9 °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	14:07 on 3 May, 15:02 on 31 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 8 rainy days

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

Watermelon in Worcester (United States): 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 Worcester (United States) during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 28.6 °C. Months that stay below 18 °C even by day on average: October (17 °C) and November (9.9 °C). Nights average below 18 °C in May, June and August–November (1.8–17.7 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19.9	9.4	101	13	14:34
June	25.5	14.9	88	12	15:15
July	28.6	18.6	130	14	14:59
August	27.4	17.7	85	11	13:56
September	23.1	14.2	115	10	12:32
October	17	8.6	114	10	11:07
November	9.9	1.8	81	8	9:49

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Worcester (United States), New Haven is 5 days earlier and Concord 1 day later.

City	Distance	Date	Difference
Providence	60 km	31 May – 30 July	same day
Boston	62 km	29 May – 4 August	2 days earlier
Manchester (United States)	85 km	30 May – 24 July	1 day earlier
Hartford	93 km	31 May – 30 July	same day
Concord	107 km	1 June – 22 July	1 day later
New Haven	141 km	26 May – 3 August	5 days earlier

Where to buy watermelon plants and seeds near Worcester (United States)

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 Worcester (United States) OpenStreetMap lists 3 garden centres, 1 plant nursery, 5 markets and 4 farm shops (collected 28 October 2026).

Worcester Public Market — market
2 km · worcesterpublicmarket.org
Gibson's Dairy — market
4 km
Busy Bee Landscape & Garden Center — garden centre
Broad Street 58 · Mon–Sat 08:00–17:00; Sun 10:00–17:00 · 14 km
The Plant Ward — garden centre
Pleasant Street 1102A, 01602 Worcester · 4 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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