Should We Cover Tomato Plants Tonight at 36 Degrees?

The temperature is dropping rapidly, and you're wondering whether to protect your tomato plants. With the temperature hovering around 36 degrees, you want to make a decision quickly. Here are some factors to consider:

The Type of Tomato Plants

The first factor to consider is the type of tomato plants you're growing. Generally, the determinate varieties, which grow up to a certain height and stop growing, are hardier than the indeterminate varieties, which keep growing and can become quite tall. If you're growing determinate tomato plants, they might be able to tolerate a bit more cold weather without protection. However, if you're growing indeterminate tomato plants, they're more fragile and are more likely to suffer from cold temperatures.

The Maturity of the Tomato Plants

The second factor to consider is the maturity of the tomato plants. If your tomato plants are young and have just been transplanted, they will be more sensitive to the cold than older, established plants. Consider covering them if the temperature drops below 40 degrees. Mature tomato plants, on the other hand, can handle some cold if they have been properly acclimated.

The Length of Time of the Cold

The third factor to consider is how long the cold will last. If the temperature will only be below 36 degrees for a few hours during the night, your tomato plants will probably be fine without protection. However, if the temperature will remain below 36 degrees for an extended period, your tomato plants might sustain damage, especially if they're young, fragile, or not well acclimated.

The Type of Covering

The fourth factor to consider is the type of covering you will use. If you're using a heavy or waterproof covering, it can actually trap moisture, which can lead to fungal diseases on the tomato plants. Instead, use a lightweight or breathable covering, such as a bed sheet, light blanket or row cover. These materials will allow enough air circulation to prevent moisture buildup, while still providing protection from the cold.

The Benefits of Covering Tomato Plants

While covering tomato plants may seem like a lot of work, it can provide many benefits. Covering tomato plants on nights where the temperature may drop below 36 degrees can prevent frost damage. Frost can kill tomato plants or cause them to become weak and vulnerable to pests and diseases.

Covering tomato plants can also help to maintain their temperature. Plants can lose heat during the colder months, which can affect growth and fruit production. By covering them, you can maintain their temperature, allowing them to continue to grow and produce fruit, even in colder conditions.

The Bottom Line

In conclusion, if your tomato plants are young, fragile, or not well established, and if the temperature is expected to drop below 36 degrees for an extended period, you should consider covering them. Use a lightweight or breathable cover, and remove it during the day to prevent moisture buildup. By protecting your tomato plants, you can keep them healthy and continue to enjoy fresh, homegrown tomatoes throughout the season.