Grow Frost-Tolerant Vegetables in the Cool Season Once autumn weather drifts into your area, unexpected early frost can ruin tender crops, like tomatoes, while other plants survive—and even thrive—when the temperature drops below freezing.
This is a MUST READ for anyone growing tomatoes. There's LOTS of science behind this planting plan that makes super healthy plants. Links give even more advice/ with pictures. remember to read this before planting.