Gardening Reference » Gardening in 2002
I wouldn't suggest you keep them in the garage for the winter as they might freeze. I would bring them in the house for the winter in a sunny window and keep deadheading. Do this before you turn on the heat so they will have time to adjust to the indoor climate.
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When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.