When to plant zucchini in Dover: 11 May – 9 September

In Dover, zucchini: sow for seedlings from 30 March to 19 August; plant into a greenhouse from 20 April to 9 September; plant out into open ground from 11 May to 9 September. For plants and seeds, the places nearby include Lancaster County Farmers Market (farm shop, 1 km) and Tractor Supply Co (farm shop, 7 km); addresses and opening hours are below.

Zucchini in Dover: soil, season and weather

In Dover the soil, not frost, sets the date: the last frost is over around 28 March, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 11 May, 44 days later.

Last spring frost	28 March
Top 7 cm of soil at 18 °C	11 May, 44 days after the last frost
First autumn frost	26 November, 199 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	16 June – 15 October
Days left for picking	163
Daylight	13:25 on 20 April, 14:11 on 11 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 7 rainy days

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

Zucchini in Dover: care after planting

Planted on 11 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Dover during the zucchini season

About 830 mm of rain falls in the season; November is the driest month (72 mm) and July the wettest (167 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	22	13.7	133	13	14:18
June	27.2	19	101	11	14:54
July	29.9	22.5	167	14	14:40
August	28.5	21.4	134	13	13:44
September	25.5	18.5	127	11	12:29
October	20.3	12.6	96	8	11:13
November	13.6	5.9	72	7	10:03

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Dover, Washington, D.C. is 7 days earlier and Trenton 10 days later.

City	Distance	Date	Difference
Annapolis	87 km	8 May – 2 September	3 days earlier
Philadelphia	93 km	14 May – 25 August	3 days later
Baltimore	95 km	5 May – 5 September	6 days earlier
Atlantic City	97 km	5 May – 5 September	6 days earlier
Washington, D.C.	134 km	4 May – 30 August	7 days earlier
Trenton	134 km	21 May – 26 August	10 days later

Where to buy zucchini plants and seeds near Dover

Buy plants ready to set out from 11 May to 9 September (from 20 April to 9 September for an unheated greenhouse); seed for raising your own is sown from 30 March to 19 August. Within 15 km of Dover OpenStreetMap lists 1 market and 2 farm shops (collected 28 October 2026).

Spence's Bazaar — market
South New Street 550, 19904 · Tue, Fri 07:30–17:00; Sat 07:30–15:00 · 1 km
Lancaster County Farmers Market — farm shop
South New Street 544, 19904 · Tue, Fri 07:00–17:00; Sat 07:00–15:00 · 1 km
Tractor Supply Co — farm shop
South Dupont Highway 4089, 19901 · Mon–Sat 08:00–20:00; Sun 09:00–19:00 · 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