When to plant pumpkins in Hartford: 31 May – 14 July

In Hartford, pumpkin: sow for seedlings from 29 March to 2 June; plant into a greenhouse from 10 May to 14 July; plant out into open ground from 31 May to 14 July.

Pumpkin in Hartford: soil, season and weather

In Hartford the soil, not frost, sets the date: the last frost is over around 13 April, but the top 7 cm of soil reaches 18 °C — the minimum on the pumpkin card — only around 31 May, 48 days later.

Last spring frost	13 April
Top 7 cm of soil at 18 °C	31 May, 48 days after the last frost
First autumn frost	8 November, 161 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	14 August – 27 September
Days left for picking	86
Daylight	13:30 on 19 April, 14:58 on 31 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, June, has 12 rainy days

The same dates in Hartford hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Watermelon.

Pumpkin in Hartford: care after planting

Planted on 31 May: in the first weeks water every 4 days.

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

21 June — feed: nitrogen

Pests and diseases of pumpkin 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 Hartford during the pumpkin season

About 767 mm of rain falls in the season; June is the driest month (82 mm) and July the wettest (141 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	20.8	9.9	114	13	14:31
June	26.5	15.2	82	12	15:12
July	29.5	19	141	14	14:56
August	28.1	18.1	95	11	13:54
September	24.1	14.5	127	9	12:32
October	18.1	8.9	126	11	11:08
November	10.8	1.9	82	9	9:51

ERA5 2016–2025, Open-Meteo

Pumpkin in nearby cities

2 of the nearest cities share Hartford's date.

City	Distance	Date	Difference
New Haven	54 km	26 May – 18 July	5 days earlier
Worcester (United States)	93 km	31 May – 14 July	same day
Providence	106 km	31 May – 14 July	same day
Albany	133 km	30 May – 12 July	1 day earlier
Boston	150 km	29 May – 19 July	2 days earlier
New York	161 km	21 May – 26 July	10 days earlier

Where to buy pumpkin plants and seeds near Hartford

Buy plants ready to set out from 31 May to 14 July (from 10 May to 14 July for an unheated greenhouse); seed for raising your own is sown from 29 March to 2 June. Within 15 km of Hartford OpenStreetMap lists 10 garden centres, 1 farm-supply shop, 1 plant nursery, 5 markets and 11 farm shops (collected 20 October 2026).

Bidwell's — garden centre
13 km
Plummer Landscaping — garden centre
15 km
Warner Nursery — garden centre
15 km
Lowes — plant nursery
6 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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