When is the Best Time to Plant Tomatoes in Seattle?

Tomatoes are a popular crop for gardeners in Seattle because they are easy to grow and yield tasty results. However, planting tomatoes in the wrong season can result in a disappointing harvest. So, when is the best time to plant tomatoes in Seattle?

Spring Planting

The most popular time to plant tomatoes in Seattle is in the spring, typically around mid-April to early May. This is when the weather starts to warm up and the danger of frost has passed. Planting at this time ensures that the tomatoes will have enough time to grow and ripen before the cooler fall weather sets in.

It's important to note that Seattle's climate is unique, and the right planting time can vary from year to year depending on the weather. If spring is unusually cool and wet, it may be best to hold off on planting until the conditions improve.

Fall Planting

Another option for planting tomatoes is in the fall, around late August to early September. This is a good time for a second round of planting or for those who missed the spring planting season. Planting in the fall often results in a later harvest, but the cooler temperatures and shorter days can also help to produce sweeter and fuller-flavored fruit.

It's worth noting that fall planting relies on the use of determinate tomato varieties, which are bred to mature quickly and ripen all at once. This is because the shorter days and cooler temperatures in the fall mean that there isn't enough time for indeterminate tomato varieties to mature and ripen before the weather turns too cold.

Greenhouse Growing

For those who want to grow tomatoes year-round or to extend the growing season, greenhouse growing is an option. This allows for more control over the environment and eliminates the need to worry about the weather.

It's important to choose the right tomato variety for greenhouse growing, such as early-ripening varieties that are suited for cooler temperatures. Additionally, greenhouse growing can be more costly and time-consuming, so it's important to weigh the pros and cons before investing in this option.

Final Thoughts

Ultimately, the best time to plant tomatoes in Seattle depends on the individual gardener's goals, preferences, and the weather conditions of the season. Whether you choose to plant in the spring, fall, or in a greenhouse, selecting the right tomato variety and providing proper care will help to yield a bountiful and flavorful harvest.