Techniques to prevent plants in pots from cold and freezing weather.
Those of us who use potted plants in our gardens, on our patios, and around our landscapes face a problem each winter: how to protect them during the long cold winter. It’s hard enough in areas where extreme cold is frequent to keep perennials in the ground alive. It’s much harder overwintering potted plants. The bulk of soil that is in the ground tends to moderate the temperatures. The small amount in pots tend to give up heat more readily. What to do?
The general rule of keeping plants in pots two zones different than the zone you live in helps. In other words, if you live in zone 6, make sure the plants you have in containers are rated to zone 4. This of course makes it difficult if you live in zone 4. There are other things you can do to carry over plants in winter. Here are some suggestions. The basic rules are, of course, to keep the soil in the pots from freezing solid and becoming totally dry; not an easy proposition. (more…)