Flowering cabbage and kale bring bright hues to the autumn landscape. These eye-catching plants combine beautifully with sweet alyssum, viola, nemesia and garden mums. Best of all, flowering cabbage and kale stand up to temps as low as 5°F and light snows. Keep an eye out for cabbage looper caterpillars on plants in early autumn. Where frost comes early, buy these plants in the largest size you can find, because cold air won’t fuel rapid growth.