When to plant zucchini in Wiesbaden: 30 May – 6 September

In Wiesbaden, zucchini: sow for seedlings from 18 April to 16 August; plant into a greenhouse from 9 May to 6 September; plant out into open ground from 30 May to 6 September.

Zucchini in Wiesbaden: soil, season and weather

In Wiesbaden the soil, not frost, sets the date: the last frost is over around 5 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 30 May, 55 days later.

Last spring frost	5 April
Top 7 cm of soil at 18 °C	30 May, 55 days after the last frost
First autumn frost	23 November, 177 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	5 July – 12 October
Days left for picking	141
Daylight	15:06 on 9 May, 16:00 on 30 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 9 rainy days

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

Zucchini in Wiesbaden: care after planting

Planted on 30 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Wiesbaden during the zucchini season

About 421 mm of rain falls in the season; August is the driest month (56 mm) and May the wettest (66 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19.9	9.9	66	12	15:24
June	25.1	14.7	59	11	16:21
July	25.9	15.7	64	10	15:59
August	26.1	15.8	56	9	14:32
September	21.6	12.1	56	9	12:41
October	15.7	8	63	13	10:49
November	9	3.4	57	13	9:04

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

1 of the nearest cities share Wiesbaden's date.

City	Distance	Date	Difference
Frankfurt	32 km	4 June – 31 August	5 days later
Mannheim	68 km	1 June – 3 September	2 days later
Bonn	108 km	4 June – 2 September	5 days later
Karlsruhe	120 km	30 May – 2 September	same day
Saarbrücken	130 km	3 June – 1 September	4 days later
Cologne	132 km	3 June – 3 September	4 days later

Where to buy zucchini plants and seeds near Wiesbaden

Buy plants ready to set out from 30 May to 6 September (from 9 May to 6 September for an unheated greenhouse); seed for raising your own is sown from 18 April to 16 August. Within 15 km of Wiesbaden OpenStreetMap lists 18 garden centres, 1 farm-supply shop, 6 plant nurseries, 17 markets and 28 farm shops (collected 28 October 2026).

Wochenmarkt Mainz Leichhof — market
Leichhof, 55116 Mainz · Mon, Wed 11:00–18:00 · 9 km · mainz.de
Wiesbadener Wochenmarkt — market
Wed 07:00–14:00; Sat 07:00–14:00 · 0 km · wiesbaden.de
Wochenmarkt Bierstadt — market
Fri 10:00–15:00 · 3 km · wiesbaden.de
Wochenmarkt — market
Fri 10:00–18:00 · 5 km · wiesbaden.de

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