I live in Halifax, NS - Canada. The winters here are very cold and we get a lot of snow during the winter months. I have two Hibiscus plants that I have taken from the outdoors and moved into my garage that is not heated. The only light that the plants receive is light from the light switch. Over the last week the leaves have become very dry and have wilted(soil is moist). I am not sure if the plant is still alive. I was not planning on taking the plants indoors because of the bugs. Have I killed my plants or will they come back in the spring?