When to plant tomatoes in Guarapuava: 12 August – 3 March

In Guarapuava, tomato: sow for seedlings from 31 May to 11 January; plant into a greenhouse from 22 July to 3 March; plant out into open ground from 12 August to 3 March. For plants and seeds, the places nearby include Master Campus (farm supply, 5 km); addresses and opening hours are below.

Tomato in Guarapuava: soil, season and weather

In Guarapuava frost, not soil, sets the date: the top 7 cm of soil warms to 15 °C — the minimum on the tomato card — around 10 August, 5 days after the last frost on 5 August, so planting waits only for the week after that frost.

Last spring frost	5 August
Top 7 cm of soil at 15 °C	10 August, 5 days after the last frost
Into an unheated greenhouse	22 July – 3 March; July outside: 8.9 °C at night, 18.4 °C by day; card 16–27 °C
First autumn frost	23 June, 316 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	21 October – 12 May
Days left for picking	246
Daylight	10:33 on 21 June, 11:09 on 12 August
Watering outdoors when fruiting (card)	every 3 days; the driest month, April, has 9 rainy days

Tomato in Guarapuava: care after planting

Planted on 12 August: in the first weeks water every 4 days.

Feeding, by the card’s schedule from that day:

12 August — feed: balanced (NPK)
9 September — feed: nitrogen

Pests and diseases of tomato to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Weather in Guarapuava during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, December, averages 24.7 °C. Nights average below 16 °C in March–June and August–December (9.7–15.8 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
August	19.8	9.7	123	8	11:13
September	22.6	12.5	127	10	11:55
October	22.5	13.5	232	17	12:40
November	23.6	14	139	13	13:21
December	24.7	15.7	178	18	13:42
January	24.5	16.5	216	21	13:33
February	24.5	16.3	157	18	12:57
March	24	15.8	140	17	12:16
April	22.1	13.4	103	9	11:30
May	19.3	11	146	11	10:54
June	17.9	9.7	155	10	10:34

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Guarapuava, Cascavel is 18 days earlier and Lages 9 days later.

City	Distance	Date	Difference
Ponta Grossa	136 km	26 July – 4 March	17 days earlier
Cascavel	206 km	25 July – 8 March	18 days earlier
Curitiba	221 km	from 26 July	17 days earlier
Chapecó	222 km	10 August – 3 March	2 days earlier
Lages	293 km	21 August – 3 March	9 days later
Passo Fundo	332 km	26 July – 26 February	17 days earlier

Where to buy tomato plants and seeds near Guarapuava

Buy plants ready to set out from 12 August to 3 March (from 22 July to 3 March for an unheated greenhouse); seed for raising your own is sown from 31 May to 11 January. Within 15 km of Guarapuava OpenStreetMap lists 1 farm-supply shop, 1 plant nursery and 1 market (collected 27 October 2026).

Master Campus — farm supply
BR-277 2540, 85030-230 Guarapuava - PR · Mon–Sat 08:00–18:00 · 5 km
Matilde — market
Rua Fredolin Worn · 2 km
Horta Dalpozzo — plant nursery
3 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.

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