When to Plant Tomatoes in Seattle 2021

If you live in Seattle and love fresh, homegrown tomatoes, you might be wondering when the best time is to plant them. Tomatoes are warm-season crops that require plenty of sun and warmth to grow and produce sweet, juicy fruits. Here is a guide to help you determine when to plant tomatoes in Seattle in 2021.

Seattle's Climate and Growing Conditions

Seattle has a marine west coast climate, which means it has moderate temperatures throughout the year, with mild winters and cool summers. The average temperature during the growing season (April to October) ranges from 50°F to 75°F, and the city receives around 38 inches of rainfall per year.

The growing conditions in Seattle are ideal for growing a wide range of vegetables, including tomatoes. However, due to the cool summers, it is important to choose tomato varieties that are suitable for the region and can withstand the cooler temperatures.

Selecting Tomato Varieties

Seattle gardeners should choose tomato varieties that are well-suited for cool climates, such as early-maturing and indeterminate varieties. Early-maturing varieties are able to ripen and produce fruit quickly, while indeterminate varieties continue to grow and produce throughout the growing season.

Some popular tomato varieties for Seattle gardeners include Early Girl, Oregon Spring, Stupice, and Sungold. These varieties are known for their ability to grow well in cool and mild climates, and they produce delicious, juicy fruits that are perfect for salads, sandwiches, and sauces.

Planting Tomatoes in Seattle

The best time to plant tomatoes in Seattle is in late spring or early summer, when the soil has warmed up and the risk of frost has passed. Temperatures should be consistently above 50°F before planting, and soil should be moist and well-drained.

The first step to planting tomatoes is to prepare the soil. Work in some organic matter, such as compost or aged manure, to improve soil fertility and drainage. Add some slow-release fertilizer to the soil to provide nutrients throughout the growing season.

When planting tomatoes, space them apart by at least 2 feet to allow for adequate air circulation and sunlight. Water the plants regularly, providing around 1 inch of water per week. Mulch around the base of the plants to help conserve moisture and prevent soil-borne diseases.

Tips for Growing Tomatoes in Seattle

Here are some tips for growing healthy and productive tomatoes in Seattle:

Choose early-maturing and indeterminate tomato varieties.

Plant in late spring or early summer, when the soil has warmed up and the risk of frost has passed.

Prepare the soil with organic matter and slow-release fertilizer.

Space the plants at least 2 feet apart and water regularly.

Mulch around the plants to conserve moisture and prevent soil-borne diseases.

Provide support for the plants as they grow by staking or using a tomato cage.

Prune the plants to remove suckers and promote healthy growth.

Harvest the fruits when they are ripe but still firm, and store them in a cool, dry place.

Conclusion

Tomatoes are a popular and rewarding crop to grow in Seattle's moderate climate. By choosing the right varieties and following some basic planting and care guidelines, you can enjoy fresh, juicy tomatoes in your garden throughout the summer and into the fall. Happy gardening!