When to plant zucchini in Cleveland: 28 May – 4 September

In Cleveland, zucchini: sow for seedlings from 16 April to 14 August; plant into a greenhouse from 7 May to 4 September; plant out into open ground from 28 May to 4 September. For plants and seeds, the places nearby include Lakewood Garden Center (garden centre, 7 km) and Lakewood Plant Company (garden centre, 9 km); addresses and opening hours are below.

Zucchini in Cleveland: soil, season and weather

In Cleveland the soil, not frost, sets the date: the last frost is over around 9 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 28 May, 49 days later.

Last spring frost	9 April
Top 7 cm of soil at 18 °C	28 May, 49 days after the last frost
First autumn frost	21 November, 177 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	3 July – 10 October
Days left for picking	141
Daylight	14:13 on 7 May, 14:53 on 28 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 10 rainy days

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

Zucchini in Cleveland: care after planting

Planted on 28 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Cleveland during the zucchini season

About 703 mm of rain falls in the season; September is the driest month (77 mm) and July the wettest (124 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19	11.4	109	13	14:30
June	24.4	17.2	106	13	15:10
July	26.6	20.2	124	14	14:54
August	25.7	19.6	95	13	13:53
September	23.2	16.7	77	10	12:31
October	17.6	11	104	13	11:09
November	10.1	4.1	88	13	9:53

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Cleveland, Toledo (United States) is 4 days earlier and Erie 2 days later.

City	Distance	Date	Difference
Windsor	141 km	27 May – 21 August	1 day earlier
Detroit	145 km	27 May – 21 August	1 day earlier
Erie	151 km	30 May – 2 September	2 days later
Toledo (United States)	154 km	24 May – 21 August	4 days earlier
London (Canada)	169 km	29 May – 21 August	1 day later
Pittsburgh	185 km	26 May – 23 August	2 days earlier

Where to buy zucchini plants and seeds near Cleveland

Buy plants ready to set out from 28 May to 4 September (from 7 May to 4 September for an unheated greenhouse); seed for raising your own is sown from 16 April to 14 August. Within 15 km of Cleveland OpenStreetMap lists 9 garden centres and 8 markets (collected 20 October 2026).

Farmers Market (seasonal) — market
8 km
Turf World Co. — garden centre
Broadway Avenue 16626, 44137 Maple Heights · 15 km · turfworldco.com
Lakewood Garden Center — garden centre
Detroit Avenue 13220 · 7 km
Lakewood Plant Company — garden centre
Detroit Avenue 15612, 44107 Lakewood · 9 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