When to Start Tomato Plants Indoors in Oregon

Tomatoes are a popular vegetable to grow in Oregon, and starting your plants indoors can give you a jumpstart on the growing season. However, it's important to know when is the best time to start your tomato plants indoors to ensure a successful harvest. Here are some tips on when to start tomato plants indoors in Oregon.

Know Your Last Frost Date

The first step in determining when to start your tomato plants indoors is to know your last frost date. In Oregon, this typically falls between mid-March and mid-April, depending on your location. You can find out your specific last frost date by checking with your local agricultural extension office or doing a quick online search.

Count Back 6-8 Weeks

Once you know your last frost date, you can count back 6-8 weeks to determine when to start your tomato seeds indoors. This will give your plants enough time to grow and mature before they are ready to be transplanted outside.

Consider Your Tomato Variety

The best time to start your tomato plants indoors can vary depending on the variety of tomato you are growing. Some varieties, such as early ripening varieties, can be started as early as February or early March. Other varieties, such as late season or large fruit varieties, may need to be started later in the season.

Provide Adequate Light and Water for Your Plants

Once you have started your tomato plants indoors, it's important to provide them with adequate light and water to ensure they grow strong and healthy. Tomato plants need at least 12-14 hours of light per day, so consider using grow lights if you don't have a sunny window. They also need consistent moisture, so make sure to water them regularly.

Transplanting Your Tomato Plants

When it's time to transplant your tomato plants outside, be sure to wait until after your last frost date. Tomato plants are sensitive to cold temperatures, and transplanting them too early can stunt their growth or even kill them. Gradually introduce them to the outdoor environment by placing them outside for a few hours each day, gradually increasing the time each day over the course of a week or two.

In Conclusion

Starting tomato plants indoors is a great way to get a head start on the growing season in Oregon. By knowing your last frost date, counting back 6-8 weeks, considering your tomato variety, and providing adequate light and water, you can ensure a successful harvest of delicious, ripe tomatoes.