GreenlyWhen to plant zucchini in Curitiba: from 3 September
In Curitiba, zucchini: sow for seedlings from 23 July; plant into a greenhouse from 13 August; plant out into open ground from 3 September. There is no autumn frost here, so the frost dates set no end to the window.
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Zucchini in Curitiba: soil, season and weather
In Curitiba the soil, not frost, sets the date: the last frost is over around 19 July, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 3 September, 46 days later. Curitiba has no autumn frost in the median year, so frost does not end the season.
| Last spring frost | 19 July |
|---|---|
| Top 7 cm of soil at 18 °C | 3 September, 46 days after the last frost |
| Days in the bed to the first harvest (card) | 36 |
| First harvest, if planted in this window | from 9 October |
| Daylight | 11:10 on 13 August, 11:38 on 3 September |
| Watering outdoors when fruiting (card) | every 3 days; the driest month, September, has 10 rainy days |
The same dates in Curitiba hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.
Zucchini in Curitiba: care after planting
Planted on 3 September: in the first weeks water every 4 days.
Pests and diseases of zucchini to watch for:
Weather in Curitiba during the zucchini season
About 763 mm of rain falls in the season; September is the driest month (105 mm) and January the wettest (203 mm).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days | Daylight on the 15th |
|---|---|---|---|---|---|
| September | 22.6 | 12.7 | 105 | 10 | 11:55 |
| October | 22.4 | 14 | 172 | 18 | 12:40 |
| November | 23.4 | 14.7 | 121 | 17 | 13:21 |
| December | 25.4 | 16.8 | 162 | 21 | 13:43 |
| January | 25.5 | 17.8 | 203 | 24 | 13:33 |
ERA5 2016–2025, Open-Meteo
Zucchini in nearby cities
Around Curitiba, Cascavel is 40 days earlier and Lages 21 days later.
| City | Distance | Date | Difference |
|---|---|---|---|
| Ponta Grossa | 97 km | 4 September – 7 April | 1 day later |
| Guarapuava | 221 km | 22 September – 6 April | 19 days later |
| Lages | 286 km | 24 September – 6 April | 21 days later |
| Chapecó | 382 km | 12 September – 6 April | 9 days later |
| Cascavel | 425 km | 25 July – 11 April | 40 days earlier |
| Passo Fundo | 443 km | 8 September – 31 March | 5 days later |
Where to buy zucchini plants and seeds near Curitiba
Buy plants ready to set out from 3 September (from 13 August for an unheated greenhouse); seed for raising your own is sown from 23 July. Within 15 km of Curitiba OpenStreetMap lists 3 garden centres, 2 farm-supply shops, 1 plant nursery, 31 markets and 2 farm shops (collected 20 October 2026).
- Feira Livre Vila Hauer — market
Sun 07:00–13:00 · 7 km · curitiba.pr.gov.br - Feira Livre do Seminário — market
Rua Professor João Argemiro Loyola · Sábados pela manhã · 4 km - Armazém da Família Osternack — market
Rua Guaçui 5757 · 14 km - Feira Sazonal da Praça Osório — market
Mar Mon–Sat 10:00–21:00; Mar Sun 14:00–20:00; Jun–Jul Mon–Sat 10:00–21:00; Jun–Jul Sun 14:00–20:00; Sept–Oct Sat 10:00–21:00; Sept–Oct Sun 14:00–20:00; Dec Sat 10:00–21:00; Dec Sun 14:00–20:00 · 1 km
Places: © OpenStreetMap contributors, ODbL.
- How to grow zucchini
- All frost dates and weather of Curitiba
- Shops and markets: Curitiba
- Moon planting calendar for November 2026
- How we calculate the dates
Questions
When to plant zucchini in Curitiba?
In Curitiba, zucchini: sow for seedlings from 23 July; plant into a greenhouse from 13 August; plant out into open ground from 3 September. There is no autumn frost here, so the frost dates set no end to the window.
When to sow zucchini for seedlings in Curitiba?
Sow for seedlings from 23 July.
