When to plant zucchini in Le Havre: 11 June – 25 September

In Le Havre, zucchini: sow for seedlings from 30 April to 4 September; plant into a greenhouse from 21 May to 25 September; plant out into open ground from 11 June to 25 September.

Zucchini in Le Havre: soil, season and weather

In Le Havre the soil, not frost, sets the date: the last frost is over around 14 February, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 11 June, 117 days later.

Last spring frost	14 February
Top 7 cm of soil at 18 °C	11 June, 117 days after the last frost
First autumn frost	12 December, 184 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	17 July – 31 October
Days left for picking	148
Daylight	15:35 on 21 May, 16:12 on 11 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, July, has 13 rainy days

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

Zucchini in Le Havre: care after planting

Planted on 11 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Le Havre during the zucchini season

About 645 mm of rain falls in the season; July is the driest month (62 mm) and December the wettest (121 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	20.4	13.6	69	12	16:15
July	22	15.5	62	13	15:53
August	22	15.7	66	12	14:28
September	20	13.9	93	13	12:40
October	16.4	11.2	115	15	10:51
November	11.8	7.7	119	17	9:08
December	9.5	5.5	121	16	8:11

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Le Havre, Le Mans is 11 days earlier and Brighton 39 days later.

City	Distance	Date	Difference
Caen	48 km	15 June – 18 September	4 days later
Rouen	72 km	16 June – 4 September	5 days later
Brighton	150 km	20 July – 14 September	39 days later
Amiens	164 km	12 June – 4 September	1 day later
Le Mans	166 km	31 May – 7 September	11 days earlier
Portsmouth	170 km	16 June – 14 September	5 days later

Where to buy zucchini plants and seeds near Le Havre

Buy plants ready to set out from 11 June to 25 September (from 21 May to 25 September for an unheated greenhouse); seed for raising your own is sown from 30 April to 4 September. Within 15 km of Le Havre OpenStreetMap lists 4 garden centres, 1 farm-supply shop, 1 plant nursery, 9 markets and 7 farm shops (collected 20 October 2026).

Les serres de Beaucamp — plant nursery
15 km
Les Halles Centrales — market
0 km · leshallescentrales-lehavre.fr
Marché aux Poissons — market
12 km
Marché aux Poissons — market
14 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