GreenlyWhen to plant zucchini in Olomouc: 3 June – 20 August
In Olomouc, zucchini: sow for seedlings from 22 April to 30 July; plant into a greenhouse from 13 May to 20 August; plant out into open ground from 3 June to 20 August. For plants and seeds, the places nearby include MJM agro (farm supply, 2 km) and Okrasná školka Droždín (garden centre, 7 km); addresses and opening hours are below.
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Zucchini in Olomouc: soil, season and weather
In Olomouc the soil, not frost, sets the date: the last frost is over around 21 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 3 June, 43 days later.
| Last spring frost | 21 April |
|---|---|
| Top 7 cm of soil at 18 °C | 3 June, 43 days after the last frost |
| First autumn frost | 6 November, 156 days after the start |
| Days in the bed to the first harvest (card) | 36 |
| First harvest, if planted in this window | 9 July – 25 September |
| Days left for picking | 120 |
| Daylight | 15:15 on 13 May, 16:03 on 3 June |
| Watering outdoors when fruiting (card) | every 3 days; the driest month, November, has 9 rainy days |
The same dates in Olomouc hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.
Zucchini in Olomouc: care after planting
Planted on 3 June: in the first weeks water every 4 days.
Pests and diseases of zucchini to watch for:
Weather in Olomouc during the zucchini season
About 447 mm of rain falls in the season; November is the driest month (53 mm) and September the wettest (93 mm).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days | Daylight on the 15th |
|---|---|---|---|---|---|
| June | 25 | 13.9 | 80 | 12 | 16:16 |
| July | 26.1 | 15.2 | 76 | 12 | 15:54 |
| August | 26.3 | 15.3 | 85 | 10 | 14:29 |
| September | 21.2 | 11.2 | 93 | 10 | 12:40 |
| October | 15 | 6.6 | 60 | 10 | 10:51 |
| November | 8.2 | 1.9 | 53 | 9 | 9:07 |
ERA5 2016–2025, Open-Meteo
Zucchini in nearby cities
Around Olomouc, Opole is 1 day earlier and Ostrava 5 days later.
Where to buy zucchini plants and seeds near Olomouc
Buy plants ready to set out from 3 June to 20 August (from 13 May to 20 August for an unheated greenhouse); seed for raising your own is sown from 22 April to 30 July. Within 15 km of Olomouc OpenStreetMap lists 5 garden centres, 1 farm-supply shop, 1 plant nursery and 1 market (collected 28 October 2026).
- HECHT - specialista na zahradu — garden centre
Sebastiniho 579, 79607 Prostějov · Mon–Sun 08:00–20:00 · 15 km · cz.hecht.cz - Okrasná školka Droždín — garden centre
Horní Úlehla 324/32, 77900 Olomouc - Droždín · 7 km · drozdin.cz - MJM agro — farm supply
Mon–Fri 07:30–17:00, Sat 08:00–12:00 · 2 km - Tržnice — market
Mon–Sun, public holidays 00:00–00:00 · 0 km
Places: © OpenStreetMap contributors, ODbL.
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.
- How to grow zucchini
- All frost dates and weather of Olomouc
- Shops and markets: Olomouc
- Selling a surplus in Czechia
- Olomouc: #562 of 801 by frost-free season
- Moon planting calendar for November 2026
- How we calculate the dates
Questions
When to plant zucchini in Olomouc?
In Olomouc, zucchini: sow for seedlings from 22 April to 30 July; plant into a greenhouse from 13 May to 20 August; plant out into open ground from 3 June to 20 August.
When to sow zucchini for seedlings in Olomouc?
Sow for seedlings from 22 April to 30 July.
When is the last spring frost in Olomouc?
Last spring frost around 21 April, first autumn frost around 6 November.
