Canadian Garden Calendar 2026 — Month-by-Month Planting Guide
What to plant, sow, harvest, and do in your Canadian vegetable garden every month of the year — organized by region.
Canadian gardeners face a challenge no American planting guide accounts for: enormous regional variation combined with short, unforgiving growing seasons. The approach that works in Vancouver — where you can plant outdoors in March — would kill seedlings in Calgary, where frost can hit in late May. This calendar gives you region-specific guidance so you're working with your actual climate, not some generic continental average.
All timing in this guide references your last spring frost date — the most critical number in Canadian gardening. Before using this calendar, find your exact frost date here.
🇨🇦 Quick Zone Reference
BC Coast / Victoria Zone 8–9 · Last frost: Mar
Vancouver Zone 8 · Last frost: late Mar
Toronto / Hamilton Zone 6–7 · Last frost: May 9
Ottawa / Montreal Zone 5–6 · Last frost: May 15–20
Calgary Zone 4 · Last frost: May 23
Edmonton Zone 4 · Last frost: May 20
Winnipeg Zone 3–4 · Last frost: May 25
Halifax / Maritimes Zone 6 · Last frost: May 6
St. John's, NL Zone 5 · Last frost: Jun 2
❄️ January — Plan & Order
January is planning month. The garden is dormant, but this is when the most organized Canadian gardeners do their most important work: reviewing last year's notes, ordering seeds before popular varieties sell out, and mapping out the new layout.
🌱 BC Coast only — Start Indoors: Onions, leeks, celery (early starters for the longest season)
📦 Everywhere: Order seed catalogues and place orders. William Dam, West Coast Seeds, OSC, Heritage Harvest Seed are popular Canadian options.
📋 Tasks: Review last season's garden journal. Map out new bed layouts. Check and sharpen tools. Inventory seeds left from last year (test germination on paper towel).
February is when BC gardeners get serious and when the rest of Canada sets up their grow lights. The days are noticeably lengthening, but don't be fooled — it's still far too early to transplant outdoors anywhere except BC's mildest zones.
🌱 BC Coast — Start Indoors: Tomatoes, peppers, eggplant, celery, onions, leeks, brassicas (cabbage, broccoli, kale). Direct sow cold-tolerant crops outdoors under cover: peas, spinach, Asian greens.
🌱 Prairie / Ontario / Quebec (late Feb): Start onions and leeks indoors — they're the slowest growers and benefit most from a head start.
📋 Tasks: Set up grow lights and heat mats. Clean seedling trays with diluted bleach solution. Buy seed-starting mix. Check that frost-free zones in garage aren't freezing stored root vegetables.
🌱 March — Main Seed Starting Month
March is the most important month for indoor seed starting across most of Canada. Tomatoes and peppers started now will be the perfect size for transplanting after last frost. Don't start them earlier — plants that outgrow their cells before transplant time become stressed and rootbound.
🌱 Ontario, Quebec, Maritimes — Start Indoors (mid-late March): Tomatoes (6–8 weeks before frost), broccoli, cabbage, cauliflower, kale, head lettuce.
🌱 Prairies — Start Indoors (late March): Peppers and eggplant (last frost May 20–25, so 8–10 weeks back = late March).
🌿 BC Coast — Direct Sow / Transplant Outdoors: Peas, spinach, lettuce, Asian greens, arugula. Transplant cold-hardy brassica seedlings under row cover.
📋 Tasks: Add compost to raised beds. Apply pre-emergent mulch to suppress weeds. Check raised bed soil levels and top up. Order any remaining supplies.
Get your personalized seed starting dates automatically
April is when gardeners across most of Canada can finally get outdoors and start working. Cold-hardy crops can go in the ground well before last frost — many of them actually taste better when they experience some frost (spinach, kale, carrots all get sweeter). But warm-season crops are still weeks away from outdoor life.
🌱 Start Indoors (Ontario / Quebec / Maritimes, early April): Cucumbers, zucchini, squash (3–4 weeks before last frost). Basil. Final round of tomatoes if you haven't yet.
🌱 Start Indoors (Prairies, early-mid April): Tomatoes (6–8 weeks before May 20–25 frost), cabbage, broccoli, kale, head lettuce.
🌿 Direct Sow Outdoors (Ontario / Quebec / Maritimes): Peas, spinach, lettuce, radishes, arugula, beets, carrots, parsnips — all as soon as soil can be worked. These tolerate light frost.
🌿 Transplant Outdoors (BC): All cold-hardy seedlings. Direct sow warm-season crops after Apr 15 in Vancouver area.
📋 Tasks: Begin hardening off brassica seedlings. Set up trellises for peas and cucumbers. Add compost. Install irrigation if using drip system. Fertilize overwintered garlic.
🥬 Harvest: Overwintered kale and leeks (Ontario/Quebec). Fresh peas and lettuce (BC). Asparagus (established beds, late April in southern Ontario).
☀️ May — Main Planting Season
May is the busiest and most important month in the Canadian vegetable garden. Last frost passes for most of the country — Toronto and Montreal around May 10–15, Ottawa May 17–20, Calgary and Edmonton around May 20–25, Winnipeg May 25. Once that date passes, warm-season crops go in.
🍅 After Last Frost — Transplant Outdoors: Tomatoes, peppers, eggplant, basil, cucumbers, zucchini, squash. This is the main event of the Canadian growing calendar.
🌿 Direct Sow After Last Frost: Beans, corn, more carrots and beets, summer squash, sunflowers, nasturtiums. Start succession sowings of lettuce and radishes every 2 weeks.
🌱 Start Indoors (Prairies only, late May): Cucumbers, squash, zucchini (3–4 weeks before June 1 transplant date).
📋 Tasks: Harden off and transplant all warm-season seedlings. Apply mulch around transplants immediately (conserves moisture, suppresses weeds). Install tomato cages, stakes, or trellises. Set up drip irrigation or soaker hose if using.
🥬 Harvest: Asparagus (Ontario / Quebec). Radishes sown in April. Lettuce, spinach, peas (BC and southern Ontario). Garlic scapes appear in mid-May.
🌞 June — Growth Explosion
June is when your garden transforms. Transplants establish, vines begin climbing, and the first summer harvests arrive. This is the month where consistent maintenance — watering, weeding, staking — pays the biggest dividends later in the season.
🌱 Direct Sow (Prairies after June 1): Beans, corn, cucumbers, zucchini, squash. Last chance for succession lettuce before summer heat.
🌿 Succession Sow Everywhere: New lettuce and radish every 2 weeks for continuous harvest. Direct sow beans every 2 weeks for staggered harvest.
📋 Tasks: Thin carrots, beets, and other root vegetables to proper spacing. Weed weekly before weeds go to seed. Stake and prune indeterminate tomatoes (remove suckers). Fertilize heavy feeders (tomatoes, peppers, corn) with balanced fertilizer. Water deeply but less frequently to encourage deep roots. Use our Watering Calculator to dial in your schedule.
🥬 Harvest: Lettuce, spinach, peas, radishes, early kale, herbs, garlic scapes. First strawberries. Asparagus (last harvest before fronds develop).
🌾 July — Peak Summer Production
July brings the most intense gardening of the year. The harvest is beginning in earnest, hot weather demands consistent watering, and it's time to think ahead to fall crops. Don't get so caught up in summer abundance that you forget to plant for September.
🌱 Direct Sow for Fall (Ontario / Quebec, early July): Broccoli, cabbage, and kale transplants for September-October harvest. These need 60–90 days; start them now for fall production. Also: carrots sown now mature just after first fall frost (sweetened by cold).
🌱 Succession Sow: More beans, more lettuce, more radishes. Start fall lettuce and spinach from seed indoors in late July for transplanting in August.
📋 Tasks: Water deeply every 2–3 days or more in heat waves. Mulch heavily to retain moisture. Prune and stake tomatoes aggressively. Side-dress corn and heavy feeders with compost or fertilizer. Watch for pests — cucumber beetles, aphids, squash bugs peak in July.
🥬 Harvest: Beans, cucumbers, zucchini (harvest young!), first tomatoes (Toronto / Montreal), beets, early potatoes, peas, herbs. In BC: full tomato production is underway.
🍅 August — Harvest Overload
August is the moment every Canadian gardener works toward all winter. Everything is producing at once. Use our Harvest Calculator to predict when each crop will peak so nothing goes to waste.
🌱 Direct Sow for Fall (all zones): Spinach, leaf lettuce, arugula, radishes, Asian greens — all quick crops (30–45 days) that will be ready before first fall frost. Sow in gaps as summer crops finish.
🧄 Plant Garlic Ahead: Collect and cure garlic harvested in July for replanting in late September / October.
📋 Tasks: Harvest zucchini and cucumbers daily to keep plants producing. Begin preserving: canning tomatoes, freezing beans, making pesto. Remove spent plants and add to compost. Start tracking first fall frost date — use our Frost Calculator for first fall frost.
🥬 Harvest: Tomatoes, peppers, cucumbers, beans, corn, zucchini, eggplant, potatoes, onions, garlic, herbs. Full summer production across all zones.
🍂 September — Fall Transition
September is when Prairie and northern gardeners feel the clock ticking. First fall frost arrives in Calgary and Edmonton around September 15–20, Winnipeg September 20. Southern Ontario and Quebec have until October 15. Harvest decisively — don't lose tomatoes to frost.
🧄 Plant Garlic (late September): Plant hardneck garlic cloves 10–15 cm deep, 15 cm apart. This is one of the most important September tasks in Canadian gardens — garlic planted now harvests next July.
🌱 BC Coast — Direct Sow: Fall/winter kale, spinach, Asian greens, garlic. Plant cover crops (crimson clover, winter rye) in empty beds.
📋 Tasks: Harvest all peppers before first frost (green peppers ripen to red off the vine). Dig potatoes when tops die back. Bring green tomatoes indoors to ripen in a paper bag. Harvest winter squash before frost; cure at room temperature for 10 days. Mulch garlic bed with 10–15 cm of straw after planting.
🥬 Harvest: Last tomatoes and peppers. Winter squash, pumpkins. Fall broccoli and cabbage. Carrots (improve with light frost). Kale (sweetens after frost).
🍁 October–November — Cleanup & Close
First fall frost arrives across most of Canada in October: Toronto and Ottawa around October 15–20, Prairie provinces in late September to early October. The focus shifts to harvest, storage, and soil preparation for next season.
🌿 BC Coast — Direct Sow: Hardy overwintering varieties of spinach, mâche, claytonia. Plant spring bulbs: tulips, garlic, shallots.
📋 Tasks (Everywhere): Pull all frost-killed plants and compost healthy material (compost pile heats up well in fall). Cut down perennial herbs, leaving 5–8 cm of growth. Add 5–8 cm of compost to all beds now so it breaks down over winter. Apply thick mulch over garlic. Store root vegetables in cool, humid conditions (carrots and beets in damp sand, 0–4°C). Drain and store hoses. Clean and oil tools before winter storage.
🥬 Harvest: Final carrots (sweetest after frost), parsnips (leave in ground through frost for best flavor), Brussels sprouts, kale, late-season lettuce (BC only). Dig and store any remaining beets, potatoes, and celeriac.
❄️ December–February — Rest & Plan
For most Canadian gardeners, winter is off-season. But it's also when the next season's success is shaped: good planning, good seed selection, and good rest prepare you for a strong start in spring.
🌿 BC Coast — Keep Growing: Harvest overwintered kale, chard, leeks, claytonia, mâche. Start onion seeds in mid-January for spring transplanting.
🌱 Indoor Growing Everywhere: Microgreens on the kitchen counter produce in 7–14 days. Sprouts in a jar. Herbs on a sunny windowsill. Small grow-light setups can produce lettuce and radishes year-round.
📋 Tasks: Write up your garden journal while it's fresh. Research and plan new bed layouts. Order seeds before February sellouts. Read, learn, plan.
Frequently Asked Questions
When should I plant tomatoes in Canada?
Tomato transplanting date varies by city: Toronto and Montreal around May 10–15, Ottawa and Halifax May 17–20, Calgary and Edmonton May 23–25, Winnipeg late May. Always wait until after your last expected frost date. Start tomato seeds indoors 6–8 weeks before transplant date — so early to late March in most of Ontario and Quebec. Use our Seed Starting Calculator for exact dates by city.
What can I plant in April in Canada?
In April, direct sow cold-hardy crops outdoors as soon as soil is workable: peas, spinach, lettuce, radishes, arugula, beets, carrots, and chard. These tolerate light frost and actually prefer cool weather. In BC, transplant brassica seedlings outdoors. Across Ontario, Quebec, and the Maritimes, continue seed starting indoors — cucumbers, squash, and zucchini go in around early April (3–4 weeks before last frost). Prairie gardeners start tomatoes and peppers in early April.
When is it safe to plant outside in Calgary?
Cold-hardy crops (lettuce, peas, spinach, carrots, radishes) can go into Calgary soil in early to mid-May as soon as it's workable. For frost-sensitive plants like tomatoes, peppers, cucumbers, and beans, wait until after May 23 — Calgary's average last frost date. However, late frosts do still occur into early June in some years, so keep frost cloth on hand to protect transplants if forecasts drop below 2°C. Calgary's short season (120–130 frost-free days) rewards gardeners who start seeds indoors and use the full season wisely.
What should I do in my garden in March in Ontario?
March in Ontario is primarily an indoor month. Start peppers and eggplant in early March (8–10 weeks before May 10–15 last frost), followed by tomatoes in mid to late March (6–8 weeks before frost). Also start brassicas — broccoli, cabbage, cauliflower, kale. Outdoors, you can spread compost over beds that are accessible and prune any overwintered perennial herbs. Don't direct sow outdoors yet — Ontario soil is typically still too cold and wet in March for successful germination.
Plan Your Season with These Tools
Each calculator works together to give you a complete planting plan