When to plant watermelons in Kelowna: 2 June – 22 July

In Kelowna, watermelon: sow for seedlings from 14 April to 24 June; plant into a greenhouse from 12 May to 22 July; plant out into open ground from 2 June to 22 July. For plants and seeds, the places nearby include Stone Pillow Farms (farm shop, 4 km) and JM Fruit And Veg. Market (farm shop, 5 km); addresses and opening hours are below.

Watermelon 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 18 °C — the minimum on the watermelon card — only around 2 June, 45 days later.

Last spring frost	18 April
Top 7 cm of soil at 18 °C	2 June, 45 days after the last frost
Into an unheated greenhouse	12 May – 22 July; May outside: 7.6 °C at night, 21.4 °C by day; card 18–35 °C
First autumn frost	31 October, 151 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	31 July – 19 September
Days left for picking	92
Daylight	14:52 on 5 May, 16:04 on 2 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 4 rainy days

The same dates in Kelowna hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Kelowna: care after planting

Planted on 2 June: in the first weeks water every 5 days.

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

2 June — feed: balanced (NPK)

Pests and diseases of watermelon 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 watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 30.2 °C. Months that stay below 18 °C even by day on average: October (13.7 °C). Nights average below 18 °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
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

Watermelon in nearby cities

Around Kelowna, Spokane is 11 days earlier and Olympia 24 days later.

City	Distance	Date	Difference
Vancouver	270 km	22 June – 8 August	20 days later
Spokane	289 km	22 May – 6 July	11 days earlier
Victoria	325 km	13 June – 11 September	11 days later
Seattle	327 km	21 June – 15 August	19 days later
Olympia	404 km	26 June – 6 August	24 days later
Calgary	405 km	18 June – 22 June	16 days later

Where to buy watermelon plants and seeds near Kelowna

Buy plants ready to set out from 2 June to 22 July (from 12 May to 22 July for an unheated greenhouse); seed for raising your own is sown from 14 April to 24 June. Within 15 km of Kelowna OpenStreetMap lists 3 garden centres, 4 markets and 4 farm shops (collected 20 October 2026).

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
JM Fruit And Veg. Market — farm shop
Douglas Road 907 · 5 km
Stone Pillow Farms — farm shop
2220 Hayman Rd, West Kelowna, BC V1Z 1Z5 · 4 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.

Questions