When to plant tomatoes in Lugano: 28 April – 15 August

In Lugano, tomato: sow for seedlings from 14 February to 24 June; plant into a greenhouse from 7 April to 15 August; plant out into open ground from 28 April to 15 August. For plants and seeds, the places nearby include Keller Thomi SA (garden centre, 3 km) and Caminada Sementi SA (garden centre, 5 km); addresses and opening hours are below.

Tomato in Lugano: soil, season and weather

In Lugano the soil, not frost, sets the date: the last frost is over around 11 March, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 28 April, 48 days later.

Last spring frost	11 March
Top 7 cm of soil at 15 °C	28 April, 48 days after the last frost
Into an unheated greenhouse	7 April – 15 August; April outside: 7.2 °C at night, 17.1 °C by day; card 16–27 °C
First autumn frost	5 December, 221 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	7 July – 24 October
Days left for picking	151
Daylight	11:25 on 7 March, 14:10 on 28 April
Watering outdoors when fruiting (card)	every 3 days; the driest month, December, has 8 rainy days

Tomato in Lugano: care after planting

Planted on 28 April: in the first weeks water every 4 days.

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

28 April — feed: balanced (NPK)
26 May — 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 Lugano during the tomato season

Days average above the tomato card's 16–27 °C in July (27.5 °C) and August (27.3 °C). Months that stay below 16 °C even by day on average: November (12.7 °C) and December (10 °C). Nights average below 16 °C in April, May and September–December (2.1–14.8 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
April	17.1	7.2	145	12	13:31
May	20.3	11.4	208	19	14:56
June	25.5	16.4	225	17	15:44
July	27.5	18.6	209	18	15:25
August	27.3	18.7	260	15	14:11
September	22.7	14.8	195	15	12:36
October	18.6	10.7	222	14	10:59
November	12.7	5.2	155	12	9:29
December	10	2.1	88	8	8:40

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Lugano, Milan is 13 days earlier and Locarno 72 days later.

City	Distance	Date	Difference
Bellinzona	22 km	28 May – 26 July	30 days later
Locarno	22 km	9 July – 14 July	72 days later
Como	23 km	30 April – 3 August	2 days later
Milan	63 km	15 April – 10 August	13 days earlier
Bergamo	65 km	11 May – 29 July	13 days later
Novara	66 km	18 April – 2 August	10 days earlier

Where to buy tomato plants and seeds near Lugano

Buy plants ready to set out from 28 April to 15 August (from 7 April to 15 August for an unheated greenhouse); seed for raising your own is sown from 14 February to 24 June. Within 15 km of Lugano OpenStreetMap lists 8 garden centres, 2 markets and 10 farm shops (collected 27 October 2026).

Caminada Sementi SA — garden centre
Via Pré d'là 3, 6814 Lamone · Mon–Fri 07:30–18:00; Sat 07:30–17:00 · 5 km · caminadasementi.ch
Keller Thomi SA — garden centre
Strada di Pregassona 15, 6963 Pregassona · 3 km
Ketty garden — garden centre
Mon–Sat 08:30–12:15, 14:30–19:00 · 14 km
Vivaio Brugolta — garden centre
Via Statale 9 · 9 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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