When to plant cucumbers in Yellowknife: 30 June – 20 July

In Yellowknife, cucumber: sow for seedlings from 12 May to 22 June; plant into a greenhouse from 9 June to 20 July; plant out into open ground from 30 June to 20 July. For plants and seeds, the places nearby include Boreal Garden Centre (garden centre, 3 km) and Arctic Farmer Landscaping (garden centre, 4 km); addresses and opening hours are below.

Cucumber in Yellowknife: soil, season and weather

In Yellowknife the soil, not frost, sets the date: the last frost is over around 23 May, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 30 June, 38 days later.

Last spring frost	23 May
Top 7 cm of soil at 18 °C	30 June, 38 days after the last frost
Into an unheated greenhouse	9 June – 20 July; June outside: 8.6 °C at night, 18.7 °C by day; card 18–25 °C
First autumn frost	4 October, 96 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	3 August – 23 August
Days left for picking	62
Daylight	19:16 on 2 June, 19:51 on 30 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, October, has 8 rainy days

The same dates in Yellowknife hold for Bell Pepper, Eggplant, Zucchini, Pumpkin and Watermelon.

Cucumber in Yellowknife: care after planting

Planted on 30 June: in the first weeks water every 4 days.

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

7 July — feed: nitrogen

Pests and diseases of cucumber 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 Yellowknife during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, July, averages 22 °C. Months that stay below 18 °C even by day on average: September (12.7 °C) and October (3 °C). Nights average below 18 °C in every month of the season, from -1.3 °C to 13.3 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	18.7	8.6	35	6	19:55
July	22	13.3	43	8	18:59
August	19.7	12.1	46	9	16:08
September	12.7	6.5	33	7	13:03
October	3	-1.3	28	8	10:04

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Yellowknife, Kelowna is 28 days earlier and Whitehorse 9 days later.

City	Distance	Date	Difference
Edmonton	991 km	27 June – 22 July	3 days earlier
Whitehorse	1,107 km	9 July – 14 July	9 days later
Juneau	1,189 km	3 June – 22 July	27 days earlier
Saskatoon	1,235 km	15 June – 22 July	15 days earlier
Calgary	1,268 km	18 June – 17 July	12 days earlier
Kelowna	1,432 km	2 June – 16 August	28 days earlier

Where to buy cucumber plants and seeds near Yellowknife

Buy plants ready to set out from 30 June to 20 July (from 9 June to 20 July for an unheated greenhouse); seed for raising your own is sown from 12 May to 22 June. Within 15 km of Yellowknife OpenStreetMap lists 2 garden centres (collected 28 October 2026).

Boreal Garden Centre — garden centre
Drybones Drive 101 · 3 km
Arctic Farmer Landscaping — garden centre
Drybones Drive 106 · 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