When to plant watermelons in Manchester (United States): 30 May – 24 July

In Manchester (United States), watermelon: sow for seedlings from 11 April to 26 June; plant into a greenhouse from 9 May to 24 July; plant out into open ground from 30 May to 24 July. For plants and seeds, the places nearby include Twist Hill Farms (farm shop, 10 km); addresses and opening hours are below.

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

In Manchester (United States) the soil, not frost, sets the date: the last frost is over around 22 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 30 May, 38 days later.

Last spring frost	22 April
Top 7 cm of soil at 18 °C	30 May, 38 days after the last frost
Into an unheated greenhouse	9 May – 24 July; May outside: 9 °C at night, 20.1 °C by day; card 18–35 °C
First autumn frost	2 November, 156 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	28 July – 21 September
Days left for picking	97
Daylight	14:08 on 2 May, 15:05 on 30 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 9 rainy days

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

Watermelon in Manchester (United States): care after planting

Planted on 30 May: in the first weeks water every 5 days.

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

30 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 Manchester (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 28.9 °C. Months that stay below 18 °C even by day on average: October (16.6 °C) and November (8.9 °C). Nights average below 18 °C in May, June and August–November (0.7–17 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	20.1	9	98	12	14:38
June	25.8	14.5	94	11	15:20
July	28.9	18.1	116	13	15:04
August	27.4	17	97	11	13:58
September	23.2	13.4	91	9	12:33
October	16.6	7.7	121	10	11:06
November	8.9	0.7	80	9	9:45

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Manchester (United States), Boston is 1 day earlier and Portland, Maine 21 days later.

City	Distance	Date	Difference
Concord	25 km	1 June – 22 July	2 days later
Boston	77 km	29 May – 4 August	1 day earlier
Worcester (United States)	85 km	31 May – 30 July	1 day later
Portland, Maine	122 km	20 June – 26 July	21 days later
Providence	130 km	31 May – 30 July	1 day later
Montpelier	167 km	20 June – 8 July	21 days later

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

Buy plants ready to set out from 30 May to 24 July (from 9 May to 24 July for an unheated greenhouse); seed for raising your own is sown from 11 April to 26 June. Within 15 km of Manchester (United States) OpenStreetMap lists 6 garden centres, 1 farm-supply shop and 8 farm shops (collected 28 October 2026).

Twist Hill Farms — farm shop
08:00–18:00 · 10 km
The Home Depot Garden Center — garden centre
3 km
Green Thumb Landscaping & Garden Center — garden centre
7 km
Tim's Turf Landscape Materials — garden centre
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.

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