When Do You Plant Tomatoes in Wisconsin?

Tomatoes are a popular summer crop in Wisconsin, and anyone interested in growing them knows that timing is crucial. Planting tomatoes too early or too late can result in a disappointing harvest. So, when is the best time to plant tomatoes in Wisconsin?

Understanding Wisconsin's Climate

Before we can answer this question, we need to understand Wisconsin's climate. Wisconsin has a continental climate with warm summers and cold winters. The state experiences a short growing season, with the last frost date occurring around late April to early May in southern Wisconsin and late May in northern Wisconsin. The first frost of the year usually happens in mid-September in northern Wisconsin and mid-October in southern Wisconsin.

Choosing the Right Variety of Tomato

When choosing the right variety of tomato, it's important to consider both the days to maturity and the length of the growing season. If you're planting in southern Wisconsin, you'll want to choose a variety that matures in 70-80 days. For northern Wisconsin, you'll want to select one that matures in 80-90 days. There are also a few varieties that are cold-tolerant, which can extend the growing season a bit.

Planting Tomatoes in Wisconsin

In southern Wisconsin, tomatoes can be planted in early to mid-May, after the last frost. It's essential to wait until the soil has warmed up to at least 60 degrees Fahrenheit, as colder soil can damage the plants. In northern Wisconsin, it's best to wait until late May or early June to plant tomatoes.

When planting tomatoes, it's recommended to space them at least 2 feet apart and plant them in a sunny, well-drained area with nutrient-rich soil. Tomatoes also benefit from a layer of mulch to help retain soil moisture and prevent weeds from growing.

Tomato Care in Wisconsin

Once tomatoes are planted, it's important to care for them properly. In Wisconsin, tomatoes need consistent moisture, so regular watering is essential. They also require fertilization every few weeks during the growing season. It's also recommended to stake or cage the plants to support their growth and prevent the fruit from touching the ground, where it may be more prone to disease.

If the weather dips below 55 degrees Fahrenheit, it's a good idea to cover the tomato plants with a sheet or row cover to protect them from the cold. You may also want to keep an eye out for pests and diseases, which can be more prevalent in a humid climate like Wisconsin's.

Harvesting Tomatoes in Wisconsin

The time to harvest tomatoes in Wisconsin varies depending on the variety. As a general rule, you want to harvest when the fruit is firm, fully colored, and ripe. Don't let the tomatoes wither on the vine for too long, or they may rot or attract pests. If you have green tomatoes left on the vine at the end of the season, you can pick them and allow them to ripen indoors.

Final Thoughts

Growing tomatoes in Wisconsin can be a rewarding experience, but it requires careful timing and attention to detail. By selecting the right variety, planting at the right time, and caring for your plants properly, you can enjoy a bountiful harvest of delicious, juicy tomatoes all summer long.