Frost can damage or kill plants, particularly those that are not cold-hardy or are nearing harvest. Low overnight temperatures can freeze plant tissues, leading to wilting, discoloration, or death. While DIY fabric covers can protect plants in most cases, they are limited to temperatures above 24°F (-4°C). For colder conditions, more robust solutions like cold frames or garden hoops may be necessary. Without proper protection, gardeners risk losing crops or delaying plant recovery in the spring.