Geraniums do not tolerate frost
This also includes that Geraniums do not tolerate frost. At best, the temperature should not drop below five to ten degrees Celsius during the growing season, because then the plant stops growing until it gets warmer again. An exception is overwintering, where the degrees mentioned are optimal - after all, the plant should not sprout prematurely.
Geraniums Temperature: Frost is particularly harmful at night
However, it does not harm the geraniums if the temperatures briefly drop below five degrees Celsius - provided there is no frost. The plants do not tolerate night frost in particular, which is why they should if possible only after the ice saints - if no more cold nights are to be expected - should be planted out.
Tips
With appropriate weather, i. H. Outside temperatures in the double digits, your geraniums can too even earlier on the balcony place. But then it makes more sense to bring the plants in overnight.
