When to plant zucchini in Allentown: 23 May – 17 August

In Allentown, zucchini: sow for seedlings from 11 April to 27 July; plant into a greenhouse from 2 May to 17 August; plant out into open ground from 23 May to 17 August. For plants and seeds, the places nearby include Dominican Produce (farm shop, 2 km) and Saab Farmers Market (farm shop, 4 km); addresses and opening hours are below.

Zucchini in Allentown: soil, season and weather

In Allentown the soil, not frost, sets the date: the last frost is over around 15 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 23 May, 38 days later.

Last spring frost	15 April
Top 7 cm of soil at 18 °C	23 May, 38 days after the last frost
First autumn frost	3 November, 164 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	28 June – 22 September
Days left for picking	128
Daylight	13:58 on 2 May, 14:40 on 23 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 9 rainy days

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

Zucchini in Allentown: care after planting

Planted on 23 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Allentown during the zucchini season

About 752 mm of rain falls in the season; November is the driest month (80 mm) and August the wettest (127 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	21.6	10.8	120	13	14:25
June	26.9	15.9	101	12	15:04
July	30.2	19.6	125	14	14:49
August	28.2	18.3	127	13	13:49
September	24.9	14.9	106	10	12:30
October	18.7	9.2	93	9	11:11
November	11.3	2.4	80	9	9:57

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Allentown, Atlantic City is 18 days earlier and Harrisburg 2 days later.

City	Distance	Date	Difference
Trenton	73 km	21 May – 26 August	2 days earlier
Philadelphia	77 km	14 May – 25 August	9 days earlier
Harrisburg	124 km	25 May – 25 August	2 days later
New York	125 km	21 May – 3 September	2 days earlier
Dover	160 km	11 May – 9 September	12 days earlier
Atlantic City	165 km	5 May – 5 September	18 days earlier

Where to buy zucchini plants and seeds near Allentown

Buy plants ready to set out from 23 May to 17 August (from 2 May to 17 August for an unheated greenhouse); seed for raising your own is sown from 11 April to 27 July. Within 15 km of Allentown OpenStreetMap lists 14 garden centres, 1 plant nursery, 6 markets and 7 farm shops (collected 29 October 2026).

Dominican Produce — farm shop
West Green Street 352, 18102 Allentown · 2 km
Saab Farmers Market — farm shop
Union Boulevard 936, 18109 Allentown · 4 km
Scholl Orchards — farm shop
Center Street 3057, 18017 Bethlehem · 11 km
Parkland Nurseries — garden centre
10 km · parklandnurseries.net

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