When to plant zucchini in Hasselt: 30 May – 1 September

In Hasselt, zucchini: sow for seedlings from 18 April to 11 August; plant into a greenhouse from 9 May to 1 September; plant out into open ground from 30 May to 1 September. For plants and seeds, the places nearby include De Fruitkorf (farm shop, 6 km) and Puur Leguum (farm shop, 12 km); addresses and opening hours are below.

Zucchini in Hasselt: soil, season and weather

In Hasselt the soil, not frost, sets the date: the last frost is over around 19 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 30 May, 41 days later.

Last spring frost	19 April
Top 7 cm of soil at 18 °C	30 May, 41 days after the last frost
First autumn frost	18 November, 172 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	5 July – 7 October
Days left for picking	136
Daylight	15:12 on 9 May, 16:08 on 30 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 11 rainy days

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

Zucchini in Hasselt: 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 Hasselt during the zucchini season

About 511 mm of rain falls in the season; September is the driest month (65 mm) and June the wettest (79 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19.2	8.8	68	11	15:31
June	23	13.2	79	13	16:30
July	23.8	14	77	12	16:06
August	23.9	14.3	70	12	14:36
September	20.6	11.5	65	11	12:42
October	15.8	9.1	78	14	10:47
November	10.1	4.4	74	14	8:58

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

All the nearest cities on our list plant zucchini later than Hasselt; the closest date is in Leuven, 1 day later.

City	Distance	Date	Difference
Liège	37 km	4 June – 2 September	5 days later
Leuven	45 km	31 May – 5 September	1 day later
Namur	61 km	11 June – 29 August	12 days later
Brussels	70 km	8 June – 5 September	9 days later
Antwerp	73 km	31 May – 5 September	1 day later
Charleroi	86 km	10 June – 29 August	11 days later

Where to buy zucchini plants and seeds near Hasselt

Buy plants ready to set out from 30 May to 1 September (from 9 May to 1 September for an unheated greenhouse); seed for raising your own is sown from 18 April to 11 August. Within 15 km of Hasselt OpenStreetMap lists 21 garden centres, 1 farm-supply shop, 1 plant nursery, 2 markets and 14 farm shops (collected 27 October 2026).

Markt Hasselt — market
Fri 08:00–13:00 · 0 km
De Fruitkorf — farm shop
Stationsstraat 38, 3570 Alken · Tue–Fri 10:00–12:30, 13:30–18:00; Sat 09:00–16:30; Sun, Mon closed · 6 km
Puur Leguum — farm shop
Schootschansweg 10, 3550 Heusden-Zolder · 12 km · puurleguum.be
Proviand — farm shop
Wisselstraat 90, 3583 Paal-Beringen · 16 km · proviand.net

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