When to plant zucchini in Buffalo: 29 May – 24 August

In Buffalo, zucchini: sow for seedlings from 17 April to 3 August; plant into a greenhouse from 8 May to 24 August; plant out into open ground from 29 May to 24 August. For plants and seeds, the places nearby include Urban Roots Garden Center (garden centre, 3 km) and Northtown Garden Center (garden centre, 10 km); addresses and opening hours are below.

Zucchini in Buffalo: soil, season and weather

In Buffalo the soil, not frost, sets the date: the last frost is over around 24 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 29 May, 35 days later.

Last spring frost	24 April
Top 7 cm of soil at 18 °C	29 May, 35 days after the last frost
First autumn frost	10 November, 165 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	4 July – 29 September
Days left for picking	129
Daylight	14:22 on 8 May, 15:03 on 29 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 9 rainy days

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

Zucchini in Buffalo: care after planting

Planted on 29 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Buffalo during the zucchini season

About 618 mm of rain falls in the season; September is the driest month (73 mm) and October the wettest (103 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19.1	9.4	83	12	14:38
June	24.1	15.3	84	11	15:20
July	26.7	18.7	98	13	15:03
August	25.7	18.1	94	13	13:58
September	22.9	14.9	73	9	12:33
October	16.2	9.1	103	13	11:06
November	8.7	2.2	83	12	9:46

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

2 of the nearest cities share Buffalo's date.

City	Distance	Date	Difference
Hamilton	88 km	1 June – 21 August	3 days later
Toronto	94 km	29 May – 13 August	same day
Rochester	106 km	2 June – 26 August	4 days later
Erie	130 km	30 May – 2 September	1 day later
Kitchener	145 km	31 May – 9 August	2 days later
London (Canada)	192 km	29 May – 21 August	same day

Where to buy zucchini plants and seeds near Buffalo

Buy plants ready to set out from 29 May to 24 August (from 8 May to 24 August for an unheated greenhouse); seed for raising your own is sown from 17 April to 3 August. Within 15 km of Buffalo OpenStreetMap lists 10 garden centres and 3 markets (collected 20 October 2026).

Urban Roots Garden Center — garden centre
Rhode Island Street 428, 14213 Buffalo · 3 km
Northtown Garden Center — garden centre
Sheridan Drive 2121, 14223 Buffalo · 10 km
Fiorella's Garden Center — garden centre
Delaware Street 55, 14150 Tonawanda · 14 km
Zittel's Country Market — garden centre
Southwestern Boulevard 4415, 14075 Hamburg · 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