When to plant tomatoes in Kelowna: 19 May – 11 July

In Kelowna, tomato: sow for seedlings from 7 March to 20 May; plant into a greenhouse from 28 April to 11 July; plant out into open ground from 19 May to 11 July. For plants and seeds, the places nearby include Plant Gather (garden centre, 2 km) and Kelowna Fruits Stand (farm shop, 10 km); addresses and opening hours are below.

Tomato in Kelowna: soil, season and weather

In Kelowna the soil, not frost, sets the date: the last frost is over around 18 April, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 19 May, 31 days later.

Last spring frost	18 April
Top 7 cm of soil at 15 °C	19 May, 31 days after the last frost
Into an unheated greenhouse	28 April – 11 July; April outside: 2.4 °C at night, 14.7 °C by day; card 16–27 °C
First autumn frost	31 October, 165 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	28 July – 19 September
Days left for picking	95
Daylight	12:38 on 28 March, 15:33 on 19 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 4 rainy days

Tomato in Kelowna: care after planting

Planted on 19 May: in the first weeks water every 4 days.

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

19 May — feed: balanced (NPK)
16 June — 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 Kelowna during the tomato season

Days average above the tomato card's 16–27 °C in July (30.2 °C) and August (30.1 °C). Months that stay below 16 °C even by day on average: October (13.7 °C). Nights average below 16 °C in every month of the season, from 5.4 °C to 15.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	21.4	7.6	30	6	15:23
June	24.8	10.9	34	7	16:19
July	30.2	15.1	20	4	15:57
August	30.1	15.6	14	4	14:30
September	23.4	11.7	28	6	12:40
October	13.7	5.4	64	12	10:50

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Kelowna, Victoria is 5 days earlier and Calgary 15 days later.

City	Distance	Date	Difference
Vancouver	270 km	28 May – 28 July	9 days later
Spokane	289 km	15 May – 25 June	4 days earlier
Victoria	325 km	14 May – 31 August	5 days earlier
Seattle	327 km	17 May – 4 August	2 days earlier
Olympia	404 km	31 May – 26 July	12 days later
Calgary	405 km	3 June – 11 June	15 days later

Where to buy tomato plants and seeds near Kelowna

Buy plants ready to set out from 19 May to 11 July (from 28 April to 11 July for an unheated greenhouse); seed for raising your own is sown from 7 March to 20 May. Within 15 km of Kelowna OpenStreetMap lists 3 garden centres, 4 markets and 4 farm shops (collected 20 October 2026).

Plant Gather — garden centre
Gordon Drive 1111, Kelowna · Mon–Sun 10:00–17:00 · 2 km · plantgather.com
Buckerfield's — garden centre
Main Street 2565 · 12 km · buckerfields.ca
O K Drink'n Water Shops Ltd — market
Kane Road 1940, V1V 2J9 Kelowna · 5 km
Kelowna Fruits Stand — farm shop
Highway 97 North 5225, V1V 2K4 Kelowna · 10 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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