Calculate when your vegetables will be ready to harvest and expected yields
"Days to maturity" is one of the most important numbers on any seed packet, and one of the most misunderstood. It tells you how long a plant takes to produce harvestable food — but the starting point varies. For transplants (tomatoes, peppers, cucumbers), days to maturity is counted from transplant date. For direct-sown crops (carrots, beans, beets), it's counted from when seeds germinate.
For Canadian gardeners, days to maturity is critical for variety selection. If you're in Calgary with a 120-day growing season, a tomato variety that takes 85 days to maturity is cutting it very close — one early frost ends your harvest. Choosing varieties with 65–70 days to maturity gives you a much larger buffer. Always match your variety's days to maturity to your frost-free growing window. Use our Frost Date Calculator to find your exact growing season.
Most tomato varieties take 60–80 days from transplant to first harvest. In Canada, where the growing season ranges from 100 days (short-season regions) to 175+ days (southern Ontario and BC), choosing the right variety matters enormously. Early varieties like Stupice (55 days) and Early Girl (52 days) are ideal for Alberta and Manitoba. Larger beefsteak types often need 80–90 days and are best suited to longer-season regions like the Fraser Valley or Niagara Peninsula.
Days to maturity gives you an estimate, but visual and tactile cues are the real indicators. Tomatoes are ready when fully coloured and slightly soft to the touch. Cucumbers should be harvested before they yellow. Zucchini is best at 6–8 inches (check daily — they grow fast). Carrots are ready when shoulders are ½–¾ inch in diameter. Lettuce should be harvested before it bolts and sends up a flower stalk. For most vegetables, err on the side of harvesting slightly early — younger produce is often more tender and flavourful.
For raw yield per square foot, zucchini, cucumbers, and tomatoes top the list — a single zucchini plant can produce 6–10 lbs or more over a season. Leafy greens like kale and chard produce continuously when harvested properly. For caloric value, potatoes and beans offer exceptional return. For a short Canadian season, fast-maturing crops like radishes (25 days), lettuce (45 days), and bush beans (50 days) let you get multiple harvests from the same space through succession planting.
Succession planting means staggering plantings of the same crop every 2–3 weeks so you have a continuous harvest rather than everything ripening at once. It's especially valuable for fast-maturing crops like lettuce, radishes, beans, and spinach. Instead of planting a full row of lettuce at once and having 20 heads ready the same week, you plant a small amount every two weeks for harvests throughout the season. In Canada's shorter season, this strategy makes better use of every week of frost-free growing time.
As your first fall frost approaches, harvest all tender crops — tomatoes, peppers, cucumbers, and basil — even if not fully ripe. Green tomatoes ripen well indoors at room temperature. Pull frost-sensitive plants and add them to your compost. Cold-hardy crops like kale, spinach, carrots, and Brussels sprouts can handle several frosts and often taste better after one. Row covers or frost blankets can extend your season by 2–4 weeks in most Canadian regions. Use our Frost Date Calculator to know exactly when to start preparing.
A well-managed 4x8 raised bed (32 square feet) can produce 50–100+ lbs of vegetables in a Canadian growing season, depending on what you grow and how intensively you plant. Tomatoes alone can yield 40–60 lbs from 4 plants. A 4x8 bed planted with mixed vegetables — tomatoes, lettuce, herbs, and beans — can realistically offset $200–$400 in grocery costs per season. Raised beds with good soil, consistent watering, and proper fertilizing consistently outperform in-ground gardens of the same size.
Plan your full season from seed to harvest.