The state of Wisconsin is Zone 5 of the USDA hardiness chart. Therefore, around this time of year the buds begin to show on the trees and winter turns to spring in this climate. If you are hoping to identify a plant in your yard or you're interested in planning a garden, take a look at this site called the USDA PLANTS Database. Maintained by the United States Department of Agriculture, this database can be searched by common or scientific name, plant family or genus. Searches can also be limited by state. In addition, there is a browsable and searchable image gallery of over 1,000 plants; Fact Sheets and Plant Guides.