When to plant zucchini in Concord: 1 June – 14 August

In Concord, zucchini: sow for seedlings from 20 April to 24 July; plant into a greenhouse from 11 May to 14 August; plant out into open ground from 1 June to 14 August.

Zucchini in Concord: soil, season and weather

In Concord 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 zucchini card — only around 1 June, 40 days later.

Last spring frost	22 April
Top 7 cm of soil at 18 °C	1 June, 40 days after the last frost
First autumn frost	31 October, 152 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	7 July – 19 September
Days left for picking	116
Daylight	14:31 on 11 May, 15:09 on 1 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 11 rainy days

The same dates in Concord hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.

Zucchini in Concord: care after planting

Planted on 1 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Concord during the zucchini season

About 479 mm of rain falls in the season; August is the driest month (86 mm) and July the wettest (110 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	25.5	13.8	91	11	15:22
July	28.6	17.5	110	13	15:05
August	27.1	16.5	86	11	13:59
September	22.9	12.8	86	9	12:33
October	16.3	7	106	10	11:06

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Concord, Boston is 3 days earlier and Portland, Maine 19 days later.

City	Distance	Date	Difference
Manchester (United States)	25 km	30 May – 16 August	2 days earlier
Boston	102 km	29 May – 27 August	3 days earlier
Worcester (United States)	107 km	31 May – 22 August	1 day earlier
Portland, Maine	115 km	20 June – 18 August	19 days later
Montpelier	143 km	20 June – 31 July	19 days later
Providence	155 km	31 May – 22 August	1 day earlier

Where to buy zucchini plants and seeds near Concord

Buy plants ready to set out from 1 June to 14 August (from 11 May to 14 August for an unheated greenhouse); seed for raising your own is sown from 20 April to 24 July. Within 15 km of Concord OpenStreetMap lists 3 garden centres, 1 farm-supply shop and 6 farm shops (collected 28 October 2026).

Black Forest Nursery — garden centre
13 km
LaValley Farms — farm shop
14 km
Nature's Country Farm Stand — farm shop
14 km
Stonynook Farm — farm shop
15 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