How Cold Is Too Cold for Cut Flowers Outside

For most cut flowers, the ideal range is from 33°F to 35°F. Tropical flowers, however, require 50 to 55°F. Temperatures above the optimum levels reduce vase life and quality. Keeping flowers cool slows down respiration rate and maximizes vase life.

How long will cut flowers last in the cold?

Once they’ve cooled down, store your nice, crisp flowers in the refrigerator for about six hours at near-freezing. Flowers love 34 to 36 degrees Fahrenheit and will thrive much longer if you subject them to the Big Chill when they are freshly cut.

Is 45 degrees too cold for flowers?

Experts recommend that you bring your plants indoors when nighttime temperatures drop to 45 or 50 degrees Fahrenheit. But it may be better to act well before that, when indoor and outdoor temperatures are about the same.