Geranium overwintering

Question

Hello I am planning on the upside down overwintering of my Geraniums. When they hang can they stay in the dark. Our garage is very cold so I want to hang them in a Styrofoam box in our basement. The same way I keep our Dalhia bulbs.
But its not very pretty so I want to know can the box be closed only with aeration holes around?
Thank you
Vic
Vancouver BC Canada

Answer 1

Styrofoam doesn't breathe so it sounds like perfect breeding for fungus. Read the following article. It mentions the need to water your plant, making fungal problems more likely.
https://www.gardeningknowhow.com/ornamental/flowers/geranium/how-to-save-geraniums-over-the-winter.htm