When to plant zucchini in Mulhouse: 1 June – 31 August

In Mulhouse, zucchini: sow for seedlings from 20 April to 10 August; plant into a greenhouse from 11 May to 31 August; plant out into open ground from 1 June to 31 August.

Zucchini in Mulhouse: soil, season and weather

In Mulhouse the soil, not frost, sets the date: the last frost is over around 6 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 1 June, 56 days later.

Last spring frost	6 April
Top 7 cm of soil at 18 °C	1 June, 56 days after the last frost
First autumn frost	17 November, 169 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	7 July – 6 October
Days left for picking	133
Daylight	14:57 on 11 May, 15:44 on 1 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 10 rainy days

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

Zucchini in Mulhouse: care after planting

Planted on 1 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Mulhouse during the zucchini season

About 423 mm of rain falls in the season; September is the driest month (60 mm) and November the wettest (83 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	24.9	14.5	77	13	15:59
July	26.3	15.6	64	11	15:38
August	26.4	15.5	67	11	14:20
September	22	11.9	60	10	12:38
October	16.7	7.9	72	11	10:55
November	9.6	2.9	83	13	9:19

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

1 of the nearest cities share Mulhouse's date.

City	Distance	Date	Difference
Basel	29 km	5 June – 3 September	4 days later
Colmar	37 km	16 June – 31 August	15 days later
Freiburg im Breisgau	47 km	4 June – 30 August	3 days later
Bern	89 km	21 June – 17 August	20 days later
Neuchâtel	90 km	6 June – 11 September	5 days later
Strasbourg	96 km	1 June – 3 September	same day

Where to buy zucchini plants and seeds near Mulhouse

Buy plants ready to set out from 1 June to 31 August (from 11 May to 31 August for an unheated greenhouse); seed for raising your own is sown from 20 April to 10 August. Within 15 km of Mulhouse OpenStreetMap lists 12 garden centres, 2 markets and 7 farm shops (collected 27 October 2026).

AZ Bonsaï — garden centre
14 km
Extra Stockage — market
3 km
Knecht - La boutique du primeur — farm shop
5 km
Ferme Boetsch-Wolf — farm shop
10 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