Invasive species like teasel could use warmer hardiness zones to even greater advantage. (Beauty of Nature / Pixabay)

The U.S. Department of Agriculture recently released a new plant hardiness zone map, and significant swaths of the country — Chicago included — are now in warmer zones.

Despite the cold, there's plenty to do with your green thumb – even though it may be a little blue right now. Joining us with some winter gardening ideas and tips is Eliza Fournier of the Chicago Botanic Garden.