When to Plant Vegetables in Toronto — 2026 Planting Calendar
Exact indoor start dates and outdoor transplant dates for Toronto's long growing season — last frost April 20, first frost November 1, approximately 197 days.
Toronto is one of the best cities in Canada for vegetable gardening. Zone 6b, a last frost around April 20, and a first fall frost that doesn't arrive until around November 1 gives Toronto gardeners roughly 197 days to work with — nearly 80 days more than Winnipeg and over two months more than Edmonton. That changes everything about what you can grow and when.
The challenge in Toronto isn't season length — it's knowing how to use it. Starting seeds at the right time in February and March, managing cool-season crops through the summer heat, and fitting in multiple successions through the long season requires a different approach than Prairie gardening. Use this guide alongside the seed starting calculator to build your full 2026 planting schedule.
📅 Toronto's Key Frost Dates — 2026
Toronto 2026 Planting Calendar — Full Table
All dates calculated from Toronto's average last frost of April 20. "Start indoors" counts backward by the recommended weeks. "Direct sow" is when it's safe to plant seeds in the garden.
| Vegetable | Start Indoors | Transplant Out | Direct Sow | Days to Harvest |
|---|---|---|---|---|
| 🍅 Tomatoes | Mar 2–16 | Apr 20–May 1 | — | 55–90 days |
| 🌶️ Peppers | Feb 18–Mar 4 | May 1–10 | — | 60–90 days |
| 🍆 Eggplant | Feb 18–Mar 4 | May 10–20 | — | 65–80 days |
| 🥒 Cucumbers | Apr 1–7 | Apr 27–May 7 | Apr 27–May 7 | 50–65 days |
| 🎃 Zucchini / Summer Squash | Apr 1–7 | Apr 27–May 7 | Apr 27–May 7 | 50–60 days |
| 🎃 Winter Squash / Pumpkins | Apr 1–14 | May 1–10 | May 1–10 | 85–110 days |
| 🍉 Watermelon | Apr 1–14 | May 10–20 | — | 70–90 days |
| 🍠 Sweet Potatoes | Start slips Mar 25 | May 10–20 | — | 90–110 days |
| 🌽 Sweet Corn | — | — | May 1–15 | 65–85 days |
| 🥦 Broccoli | Mar 9–23 | Apr 1–20 | — | 60–80 days |
| 🥬 Cabbage | Mar 2–16 | Apr 1–20 | — | 70–120 days |
| 🧅 Onions (from seed) | Jan 25–Feb 8 | Apr 1–20 | — | 100–120 days |
| 🧅 Onions (sets) | — | — | Apr 1–20 | 65–75 days |
| 🥕 Carrots | — | — | Apr 1–Jun 15 | 70–80 days |
| 🫘 Bush Beans | — | — | May 1–Jul 15 | 50–60 days |
| 🟢 Peas | — | — | Mar 25–Apr 20 | 55–70 days |
| 🥬 Lettuce | Mar 9–23 | Apr 1–20 | Apr 1–May 15, Aug 1–Sept 1 | 45–60 days |
| 🌿 Spinach | — | — | Mar 25–May 1, Aug 1–Sept 1 | 40–50 days |
| 🥦 Kale | Mar 9–23 | Apr 1–20 | Apr 1–May 15, Aug 1 | 55–75 days |
| 🌿 Basil | Apr 1–7 | May 1–10 | — | 60–90 days |
| 🫚 Garlic | — | — | Plant Oct 15–Nov 1 | Harvest Jul–Aug |
| 🥔 Potatoes | — | — | Apr 10–May 1 | 70–120 days |
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🌱 Free Seed Starting CalculatorWhat Toronto Can Grow That Prairie Cities Can't
Toronto's 197-day season opens up a whole category of vegetables that Prairie gardeners simply cannot grow outdoors. If you've moved from Calgary or Winnipeg, these are the crops worth trying first.
Winter Squash & Pumpkins
Butternut, acorn, delicata, and full-size carving pumpkins all need 85–110 days. Start indoors in early April and transplant in early May. Harvest in October before first frost.
Watermelons & Melons
Short-season watermelons (Sugar Baby, 75 days) and cantaloupes grow well in Toronto summers. Start indoors in early April, transplant mid-May into the warmest, most sheltered spot in your garden.
Sweet Potatoes
Need 90–110 days of warm weather. Start slips indoors in late March, transplant after May 10, and harvest before November 1. Beauregard and Georgia Jet are reliable Ontario varieties.
Eggplant
Needs the same warm conditions as peppers and a long season. Start indoors in late February, transplant mid-May. Japanese-style varieties (60–65 days) are most reliable in Toronto's climate.
Heirloom & Beefsteak Tomatoes
Brandywine (80 days), Cherokee Purple (80 days), Mortgage Lifter (85 days) — varieties Prairie gardeners can't touch. Toronto's long season makes the full spectrum of heirloom tomatoes achievable.
Full-Season Sweet Corn
Direct sow in early May and harvest in August. Ontario is corn country — your garden can produce the same quality sweetcorn as a farm stand with the right variety and warm soil.
🍅 Growing Tomatoes in Toronto
Toronto is excellent tomato territory. With 197 frost-free days, you can choose from virtually any variety — from quick cherry tomatoes to large 85-day beefsteaks and heirlooms. The main challenge in Toronto is not the season length but managing disease pressure: the hot, humid Toronto summers create conditions for early blight, late blight, and septoria leaf spot. Proper spacing, airflow, and avoiding overhead watering matter more here than in drier Prairie climates.
Best Tomato Varieties for Toronto
💡 Toronto tip: Toronto's humid summers mean tomato disease pressure is higher than in drier Prairie cities. Choose disease-resistant varieties (look for letters like V, F, N, T on seed packets), stake plants for good airflow, and water at the base — never overhead. Mulching the soil surface also prevents soil-borne fungal spores from splashing up onto lower leaves.
Toronto-Specific Gardening Tips
Start seeds earlier than you think — February matters
Toronto gardeners often don't realize how early their indoor season should start. Onions and leeks need to go in late January. Peppers and eggplant start in late February. If you wait until March to start everything, you're already behind. The April 20 last frost date means your indoor season starts 8–10 weeks before that — in mid-to-late February for the slowest crops.
Succession sow cool-season crops in spring and fall
Toronto's long season allows two distinct cool-season windows: March through May, and August through October. Lettuce, spinach, kale, arugula, and radishes grow well in both windows but struggle in July heat. Sow your first round in early April for spring harvest, then sow again in early August for a fall harvest that runs through October.
Manage humidity and disease on tomatoes and squash
Toronto's humid Lake Ontario summers create more disease pressure than Prairie gardens. Space tomatoes at least 60 cm apart, remove lower leaves once plants are established, and water at the base. Watch for powdery mildew on squash from mid-July — it's normal and manageable but spreads fast in humid conditions.
Use your long fall — don't stop in September
Toronto gardeners often wind down in September when the garden is actually still highly productive. First frost doesn't arrive until around November 1. Tomatoes, peppers, eggplant, and cucumbers can all continue producing through October with no frost protection. And cold-tolerant crops — kale, spinach, arugula, Brussels sprouts — improve in flavour after the first light frosts of October.
Toronto's urban heat island works in your favour
Gardens in downtown Toronto and the inner suburbs often run a half-zone warmer than the official Zone 6b designation due to the urban heat island effect. If you're in the core, you may find your garden behaves more like Zone 7a — potentially allowing overwintering of some perennial herbs like rosemary with protection, and an even earlier spring start than April 20.
Month-by-Month Toronto Garden Calendar
- Start onions and leeks indoors (late January)
- Start peppers and eggplant indoors (late February)
- Order all seeds — popular varieties sell out
- Set up grow lights if not already done
- Start tomatoes indoors (early-mid March)
- Start broccoli, cabbage, kale indoors
- Start lettuce indoors for early transplant
- Direct sow peas outdoors (late March)
- Start cucumbers, squash, melons indoors (early April)
- Transplant cold-tolerant crops outdoors (broccoli, kale, onions)
- Direct sow carrots, spinach, lettuce outdoors
- Transplant tomatoes after April 20
- Harden off all seedlings
- Transplant peppers, eggplant, basil, sweet potatoes (after May 10)
- Direct sow beans, corn, squash
- Succession sow beans every 2–3 weeks
- Harvest peas, lettuce, early beans (June)
- Harvest tomatoes, cucumbers, zucchini (July onward)
- Sow fall lettuce, spinach, kale (early August)
- Succession sow beans through mid-July
- Water consistently during heat waves
- Continue harvesting tomatoes, peppers through October
- Harvest winter squash, pumpkins, sweet potatoes before Nov 1
- Harvest fall kale, spinach, arugula through frost
- Plant garlic (mid-October to November 1)
- Clear beds and add compost layer
Frequently Asked Questions
When is the last frost in Toronto?
Toronto's average last spring frost is April 20. In warm years it can come as early as April 7. It's safe to transplant frost-sensitive plants like tomatoes after April 20, though keeping frost cloth handy through the end of April is wise.
When should I start tomatoes indoors in Toronto?
Start tomato seeds indoors between March 2 and March 16 — 6 to 8 weeks before Toronto's April 20 last frost. Unlike Prairie cities, Toronto gardeners can choose any tomato variety including long-season heirlooms up to 85–90 days. Use the seed starting calculator for a full schedule.
What hardiness zone is Toronto?
Toronto is Canadian Hardiness Zone 6b — the warmest zone of any major city in this guide and significantly warmer than the Prairie cities. Urban areas of downtown Toronto may experience Zone 7a conditions due to the heat island effect.
Can I grow watermelons in Toronto?
Yes — short-season watermelons like Sugar Baby (75 days) grow well in Toronto. Start indoors in early April, transplant mid-May into the warmest spot in your garden with black plastic mulch to warm the soil. This is not reliably possible in any Prairie city.
When is the first fall frost in Toronto?
Toronto's average first fall frost is around November 1. This is exceptionally late compared to Prairie cities — Winnipeg's first frost is September 20, over six weeks earlier. Toronto gardeners can continue harvesting tomatoes, peppers, and cucumbers through all of October with no protection needed in most years.
📖 Related Guides & Calculators
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