When to Plant Tomato Seeds in Ontario

Tomatoes are one of the most popular vegetables to grow in Ontario. They are relatively easy to cultivate, and homegrown tomatoes are incomparable in taste and nutrients to store-bought tomatoes. However, the timing of planting tomato seeds is crucial to their success.

Timing is Everything

The best time to start tomato seeds in Ontario is in mid-March to early April. This timing is ideal as it allows the seeds to germinate indoors under controlled conditions before being transplanted outdoors. It also means the outdoor planting time coincides with the last frost date in the region.

The last frost date varies depending on your location in Ontario, but it typically falls between late April and early June. The exact date can be determined by checking with your local weather service or university extension service.

Prepping the Seeds

Before planting tomato seeds, they can be prepped by soaking them in warm water for 12-24 hours. This process can help to soften the seed coat and promote faster germination. In addition, the seeds can be planted in a seed-starting mix that consists of peat, perlite, or vermiculite. This mixture provides good drainage while also retaining moisture for the seeds.

Conditions for Germination

In order to ensure successful germination, tomato seeds require specific conditions. They need a temperature range of 70-80°F (21-27°C) and plenty of sunlight. If sunshine is not readily available, fluorescent grow lights can be used to provide the artificial lighting needed for the seeds to grow. Also, make sure to keep the soil moist but not overly wet, as too much water can rot the seeds.

When to Transplant Outdoors

Once tomato seedlings have grown to approximately 6-8 inches tall and have developed their first true leaves, they can be transplanted outdoors. This generally takes place in late May or early June. However, pay attention to weather conditions as some years, the last frost may occur later, and outdoor planting may need to be delayed.

When transplanting the seedlings outdoors, make sure to select an area that receives at least six hours of sunlight per day. The soil should be well-draining, and compost or aged manure should be added to provide nutrients for the plants. Also, tomato plants need to be spaced 3-4 feet apart to ensure proper growth and adequate airflow.

Caring for Tomato Plants

After planting, tomato plants require consistent care to ensure a bountiful harvest. They need to be watered regularly and fertilized with a balanced fertilizer every two to three weeks. Also, pruning is necessary to remove suckers and promote upward growth. Finally, tomatoes need to be staked or caged to support the plants' weight and protect them from wind damage.

In Conclusion

The ideal time to plant tomato seeds in Ontario is in mid-March to early April, with transplanting taking place in late May or early June. Proper soil preparation, consistent watering, and pruning, along with staking or caging, are essential to ensure a healthy tomato crop. By following these guidelines, gardeners in Ontario can ensure a successful and rewarding tomato growing season.