Cold weather and Citronella plants
At what temp is this plant safe outdoors?
Certified GKH Gardening Expert
These plants will start to die in the lower 60's. You will have to bring them in when temperatures approach this. Here is an article that will give you more information: https://www.gardeningknowhow.com/edible/herbs/scented-geranium/mosquito-citronella-geranium-plant.htm