Can Petunias Survive German Winters?

Petunias are hardy annuals — they tolerate light frost but die at hard freeze. In Germany, where winters drop well below freezing by October/November, petunias won't survive outdoors. You cannot overwinter them indoors successfully as houseplants. Plan to buy new plants or start seeds each spring.

Enjoy them through autumn, then compost them when hard frost arrives. Their low cost and high impact make them worth replanting yearly.