Think in temperature, not just dates

Ontario gardeners often search for one planting date, but the better approach is to divide crops by cold tolerance. Peas, spinach, lettuce, and radishes can go in early. Tomatoes, peppers, beans, squash, and basil should wait until frost danger has passed and the soil has warmed. That single shift prevents a lot of lost time and replanting.

Easy non-GMO choices for Ontario

• Peas, lettuce, spinach, and radishes for spring
• Beans, bush zucchini, cucumbers, and basil for summer
• Tomatoes and peppers as indoor starts
• Carrots, beets, kale, and cilantro for late summer sowing

A practical sowing rhythm

Where gardeners lose time

Common Ontario mistakes include sowing warm crops too early, underestimating fall planting opportunities, and choosing overly long-season varieties. In many home gardens, compact or earlier-maturing varieties are the safest bet.

Best strategy for a productive season

Mix indoor-started warm crops with fast direct-sown greens and roots. That gives you harvests from spring through fall instead of one big summer push. In Ontario, succession planting matters. Re-sow lettuce, beans, cilantro, and radishes rather than planting everything once.

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