BC Seed Starting Schedule 2026

BC Seed Starting Calendar by Region

The two-column table below compares coastal BC (Vancouver/Victoria) with interior BC (Kelowna/Kamloops). Northern BC (Prince George, Fort St. John) follows a schedule closer to Prairie Zone 3 and is not shown separately — those gardeners should follow our Alberta seed-starting schedule with modest adjustments for local conditions.

Coastal dates target transplant windows in late March through mid-April; interior dates target mid-to-late May. The 4–6 week difference between the two regions' transplant dates drives everything else in the schedule. Coastal BC gardeners managing both regions (e.g., mainland and summer Okanagan property) often run two separate seed-starting streams on different schedules.

Coastal BC — Canada's Earliest Seed Starting

Vancouver and Victoria gardeners start onion seeds in mid-to-late December and early January — while the rest of Canada is still in deep winter. Reason: coastal BC's 275–302 frost-free days start with February or early March last-frost dates, requiring indoor starts much earlier than elsewhere. A Vancouver onion sown December 15 transplants outdoors March 15–April 1 and bulbs up for July–August harvest — standard timing for the coastal climate.

Tomatoes and peppers follow in January: Vancouver starts peppers January 1–15 and tomatoes January 15–February 1. The 10-week indoor period produces mature transplants ready to go outdoors by mid-April. Polytunnel or greenhouse gardeners start even earlier — late December starts for warm-season crops they'll transplant into protected growing by mid-March.

The coastal challenge is light quality, not timing. Vancouver and Victoria winters have extensive cloud cover — Greater Vancouver averages only 20 cloudless days November through February. January daylight at 49°N is 9 hours but much of that time sees low overcast conditions. Window-grown seedlings stretch severely during cloudy weeks. Grow lights are not optional for coastal BC January starts.

Heat management: coastal BC homes run cooler in winter (12–18°C typical) than interior homes due to less need for aggressive heating. Cool indoor temperatures slow germination and seedling growth. Heat mats for germination plus a slightly warmer room (office with supplemental heater, or basement near a furnace) improve results significantly over unheated rooms.

Interior BC — Semi-Arid Season Extension

Kelowna, Kamloops, and Penticton have semi-arid continental climates with cold winters and hot dry summers. Last frost is late April (Kelowna April 30) with only 165–180 frost-free days. Seed starting timing resembles Ontario: tomatoes March 10–20, peppers February 15–March 1, brassicas February 20–March 15.

Interior BC homes are drier than coastal BC homes (winter humidity often 15–25%), requiring humidity management during seed starting. Humidity domes over seed trays during germination prevent desiccation. Drier air also promotes faster germination at correct temperature — heat mat soil stays consistently warm without the cool-damp conditions that slow coastal germination.

Natural light is better in interior BC. Kelowna's winter sees more clear days than Vancouver's, producing stronger windowsill growing than on the coast. Grow lights remain helpful for peppers and eggplant (heat-loving, light-demanding crops) but optional for brassicas and cool-season starts that tolerate lower light.

Irrigation planning from day 1 is essential for interior BC. The Okanagan's semi-arid summer (200 mm annual rainfall) cannot support vegetables without supplemental water. Drip irrigation systems installed at transplant day produce better results than retrofitting later. Budget irrigation infrastructure alongside seeds and pots.

BC-Specific Crops Worth Starting

Coastal BC overwintering brassicas: plant kale, Brussels sprouts, and winter cabbage in June for fall/winter harvest. Unique to coastal BC — this practice has no equivalent elsewhere in Canada because only coastal BC's mild winters allow brassicas to survive outdoors from November through March. Varieties: Red Russian Kale (for winter harvest), Rubine Brussels Sprouts, January King Cabbage. Start seeds indoors May 15–June 1 for July transplanting.

Broad beans (fava beans): direct-sow outdoors in coastal BC in late October through February. Survive mild coastal winters and produce an early-spring crop in April–May. Interior BC sows broad beans in early April after frost. Varieties: Aquadulce Claudia (especially for overwintering), Windsor, Broad Windsor.

Asian greens (bok choy, tatsoi, mizuna, mustard greens): year-round on coastal BC with succession planting every 4–6 weeks. Late-summer sowings produce fall-winter harvests. Interior BC: spring (March–May) and fall (August–September) succession plantings.

Corn in Kelowna: the interior's hot summers (30–35°C peak) make corn viable in raised beds and containers in a way that fails on the cool coast. Start seeds in late April indoors, transplant in mid-May after frost. Choose short-season varieties (Early Sunglow, 62 days) for reliable ripening. Coastal BC corn rarely succeeds due to cool summer nights.

Melons and warm-season crops: interior BC's heat supports cantaloupe, watermelon, and full-sized winter squash in ways coastal BC cannot. Start indoors late April, transplant late May. Cool coastal summers below 20°C fail to develop melon sugars; the Okanagan produces excellent melon harvests.

Equipment for BC Seed Starting

Grow lights: T5 fluorescents or LED panels running 14–16 hours daily. Strongly recommended for all coastal BC January-March starts due to heavy cloud cover. Interior BC can get by with less light assistance but still benefits for peppers and eggplant.

Heat mats: $25–80. Essential for peppers, eggplant, and basil. Helpful for tomatoes. Optional for brassicas (which germinate at cooler 15–21°C). Thermostat-controlled mats prevent overheating during hot spring days.

Seed starting mix: Pro-Mix (Quebec-made, widely available in BC), Fafard, Black Gold. Do not use garden soil. A 10L bag covers 100+ 4-inch pots.

Trays and pots: 1020 trays, 72 or 50-cell inserts, 4-inch pots for potting up. Clear humidity domes for germination. Bottom-watering reservoirs to prevent damping off.

BC garden centres: West Coast Seeds (coastal BC focus), Salt Spring Seeds, Stellar Seeds. All three provide BC-specific variety recommendations and cool-tolerant genetics that translate well to coastal and interior BC conditions.

Hardening Off in BC's Variable Weather

Coastal BC hardening off: March–April weather is highly variable with frequent cool rainy stretches. Hardening schedule needs flexibility — may extend to 14 days during cloudy weather rather than the standard 7–10 days. Protected outdoor locations (covered porch, carport) work well during wet weeks.

Interior BC hardening off: April weather is drier and often sunnier than coastal. Standard 7–10 day schedule works well. Watch for chinook winds or unexpected warm spells that might dehydrate young seedlings — shade during extreme bright windy conditions.

Wind hardening: BC's coastal wind (especially on south-facing exposed sites) damages young seedlings. Begin hardening with sheltered locations (against house wall, behind shrubs) before full wind exposure. Brush or gentle fan oscillation indoors during the late growing phase produces sturdier stems ready for wind.

UV adjustment: BC's bright summer sun can burn tender indoor-grown leaves. Start hardening with morning sun or dappled light, extending to full-sun exposure only in days 5–7. Marine-layer cloudy days in BC coast late spring actually help — provide mild protection during the adjustment period.

Fall Garden Planning for Coastal BC

Coastal BC's unique year-round growing capability means seed starting happens twice per year: spring starts (December–February) for summer harvest, and summer starts (May–July) for fall-winter harvest. Most other Canadian regions have no fall garden seed-starting because winter ends production entirely.

July seed starts for fall/winter harvest: broccoli (for October harvest), kale (for November–March harvest), winter cabbage (for December–February harvest), Brussels sprouts (for October–February harvest), overwintering lettuce varieties. All sown indoors in July, transplanted outdoors August–September for production through winter.

August seed starts: garlic (October outdoor planting for July harvest), winter radishes (for November harvest), overwintering onion sets (for May spring bulbs).

This continuous cycle distinguishes coastal BC from every other Canadian region. A Vancouver gardener with well-organized seed-starting can harvest something from the garden 12 months of the year — a flexibility impossible in Ontario or Prairie provinces.

Frequently Asked Questions

Related BC Growing Guides