Pacific Northwest Gardening: Overwintering plants, 1 by Joy

Joy wrote:
I grow my plants mostly in containers. I have an unheated shed that I overwinter my tender plants in. It has many florescent lights on timers, many shelves, a cement floor and the walls and ceiling have been insulated. I leave the door open a crack for air circulation. I water about once a month throughout the winter. Some of my plants go completely dormant, others stay green or continue growing though they slow way down. I've even had some that bloomed in winter. I site the most tender of the plants away from the door and on a shelf as the cement floor can get very cold. I've had great success wintering my tender and tropicals this way. My dahlias and cannas (also grown in containers) are moved under an evergreen tree to give them shelter. I don't mulch them but group them closely together. All have come through many winters this way beautifully.
Here is a photo showing part of my growroom.