When to Plant Tomatoes in a Cold Greenhouse

Tomatoes are a popular garden crop, but not everyone has the luxury of a warm, sunny climate. Luckily, greenhouses can extend the growing season and allow gardeners to grow crops that might not otherwise thrive in their area. However, timing is important when it comes to planting tomatoes in a cold greenhouse. Here's what you need to know.

Understanding Your Climate

The first step to successfully growing tomatoes in a cold greenhouse is to understand your climate. Look up your USDA Hardiness Zone to determine what kind of temperatures to expect in your area throughout the growing season. This will help you plan your planting schedule accordingly.

Timing Your Planting

In general, you should aim to plant your tomato seedlings in your cold greenhouse when nighttime temperatures consistently stay above 50°F (10°C) and daytime temperatures reach at least 60°F (15°C). This typically happens in late spring or early summer, depending on your location.

It's important to note that while tomatoes are a warm-season crop, they can be damaged by excessive heat. If you live in a particularly hot area, consider planting your tomatoes in the cooler months rather than waiting until summer.

Choosing Your Varieties

When selecting tomato varieties for your cold greenhouse, it's important to choose those that can tolerate lower temperatures. Some popular choices include Siberian, Stupice, and Glacier. These varieties are known for their ability to produce fruit in cooler temperatures and have a shorter growing season than other varieties.

Preparing Your Greenhouse

Before you plant your tomato seedlings, prepare your greenhouse to create the ideal growing environment. Clean the space thoroughly to remove any debris and sanitize the surfaces to prevent disease. Consider adding a layer of insulation or using row covers to help retain heat, especially during the colder months of the growing season.

Caring for Your Tomato Plants

Once your tomato seedlings are in the ground, proper care is crucial to ensure a healthy and successful harvest. Water the plants regularly, keeping the soil consistently moist but not waterlogged. Fertilize the plants as needed, and watch for signs of pests or disease, such as yellowing leaves or spots. Remove any affected leaves or fruits as soon as possible to prevent the spread of disease.

Conclusion

Planting tomatoes in a cold greenhouse can be a rewarding experience for any gardener. By understanding your climate, timing your planting, choosing the right varieties, and properly caring for your plants, you can enjoy a bountiful harvest of delicious, homegrown tomatoes all season long.